MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer
with Advanced Shutdown Features
General Description
The MAX19757 dual-channel downconverter is designed
to provide 8.8dB gain, +25.3dBm input IP3 and 10.4dB
NF for a multitude of 1700MHz to 2700MHz basestation
receiver applications. With an optimized LO frequency
range of 1800MHz to 2600MHz, this mixer supports both
high- and low-side LO injection architectures for 1700MHz
to 2200MHz and 2000MHz to 2700MHz RF bands,
respectively. Independent path shutdown allows the user
to save DC power during low-peak usage times or in TDD
TX mode.
The device integrates baluns in the RF and LO ports, an
LO buffer, two double-balanced mixers, and a pair of dif-
ferential IF output amplifiers. The MAX19757 requires a
typical LO drive of 0dBm, and a supply current typically
300mA at band center and 350mA across the LO frequen-
cy band to achieve the targeted linearity performance.
The MAX19757 is available in a compact 36-pin TQFN
package (6mm x 6mm x 0.8mm) with an exposed paddle.
Electrical performance is guaranteed over the extended
-40°C to +105°C temperature range.
Applications
● 2.3GHz WCS Base Stations
● 2.5GHz WiMAX®, LTE, TD-LTE Base Stations
● 2.7GHz MMDS Base Stations
● UMTS/WCDMA, TD-SCDMA and cdma2000® 3G
Base Stations
● DCS1800 and PCS1900 and EDGE Base Stations
● Fixed Broadband Wireless Access
● Wireless Local Loop
● Private Mobile Radios
● Military Systems
Benets and Features
● 1700MHzto2700MHzRFFrequencyRange
● 1800MHzto2600MHzLOFrequencyRange
● 50MHzto500MHzIFFrequencyRange
● 25.3dBmIIP3
● 8.8dBConversionGain
● 13.1dBmInput1dBCompressionPoint
● 10.4dBNoiseFigure
● 73dBc2RF–2LOSpuriousRejectionatPRF = -10dBm
● DualChannelsIdealforDiversityReceiver
Applications
● IntegratedLOBuffer
● -3dBmto+3dBmLODrive
● Built-InSPDTLOSwitchwith50dBLO-to-LO
Isolation and 240ns Switching Time
● 46dBChannelIsolation
● OptionalOn-ChipDetectoratIFOutputAutomatically
Adjusts Bias Current for Optimum Power
Management
● ExternalCurrent-SettingResistorsAllowTradeoff
Between Power and Performance
● AdvancedShutdownFeaturesInclude:
• Independent Path Power-Down
• Rapid Power-Down/Power-Up Modes for Toggling
Between On/Off States in TDD Applications
• Controlled LO Port Impedance Minimizes VCO
Pulling During Power Cycling
19-6280; Rev 0; 12/12
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX19757.related.
WiMAX is a registered certification mark and registered
service mark of WiMAX Forum.
cdma2000 is a registered trademark of Telecommunications
Industry Association.
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
www.maximintegrated.com Maxim Integrated
│
2
5V DC Electrical Characteristics
(Typical Application Circuit, VCC=4.75Vto5.25V,R1=4.87kΩ,R3=154kΩtoVCC,RFandIFsingleendedports=50ΩtoGND,
LO1portdrivenfrom50Ωsource,PLO = 0dBm, fLO = 2350MHz, LOSEL = 5V, LO_TUNE1 = LO_TUNE2 = 1, PD1 = PD2 = STBY = 0,
TC = -40°C to +105°C. Typical values are at VCC = 5.0V, PLO = 0dBm, fLO = 2350MHz, LO_TUNE1 = LO_TUNE2 = 1, TC = +25°C,
unless otherwise noted.) (Notes 5, 6)
Note 3: Junction temperature TJ = TA+(θJA x VCC x ICC). This formula can be used when the ambient temperature of the PCB is
known. The junction temperature must not exceed +150°C.
Note 4: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
VCC .......................................................................-0.3V to +5.5V
RFMAIN, RFDIV, LO1, LO2,
IFM+, IFM-, IFD+, IFD- ......................... -0.3V to (VCC + 0.3V)
IF_RADJ, LO_VADJ, LOSEL,
LO_TUNE1, LO_TUNE2 ...................... -0.3V to (VCC + 0.3V)
RFMAIN to RFM_RTN, RFDIV to RFD_RTN .....................20mA
PD1, PD2, STBY, IF_DET_OUT,
IF_DET_CEXT ...................................... -0.3V to (VCC + 0.3V)
RFMAIN, RFDIV, LO1, LO2 Input Power .......................+20dBm
Continuous Power Dissipation (Note 1) ..............................8.7W
Operating Case Temperature Range (Note 2)... -40°C to +105°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (soldering 10s) ..................................+300°C
Soldering Temperature (reflow) ....................................... +260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Package Thermal Characteristics
TQFN
Junction-to-AmbientThermalResistanceθJA
(Notes 3, 4) ................................................................+36°C/W
Junction-to-CaseThermalResistanceθJC
(Notes 1, 4) ...............................................................+7.4°C/W
Absolute Maximum Ratings
Note 1: Based on junction temperature TJ = TC+(θJC x VCC x ICC). This formula can be used when the temperature of the
exposed pad is known while the device is soldered down to a PCB. See the Applications Information section for details. The
junction temperature must not exceed +150°C.
Note 2: TC is the temperature on the exposed pad of the package. TA is the ambient temperature of the device and PCB.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Vcc 4.75 5.00 5.25 V
Dual-Channel Operation
Supply Current IDUALCH
fLO = 1800MHz,
LO_TUNE1 = 0, LO_TUNE2 = 1 350 420
mA
fLO = 1900MHz,
LO_TUNE1 = 0, LO_TUNE2 = 1 324 395
fLO = 2100MHz,
LO_TUNE1 = 0, LO_TUNE2 = 0 305 365
fLO = 2300MHz,
LO_TUNE1 = 1, LO_TUNE2 = 1 293 350
fLO = 2350MHz,
LO_TUNE1 = 1, LO_TUNE2 = 1 290 350
fLO = 2500MHz,
LO_TUNE1 = 1, LO_TUNE2 = 0 285 345
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
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│
3
3.3V DC Electrical Characteristics
(Typical Application Circuit, VCC=3.1Vto3.5V,R1=4.87kΩ,R3=154kΩtoVCC,RFandIFsingle-endedports=50ΩtoGND,LO1
portdrivenfrom50Ωsource,PLO = 0dBm, fLO = 2350MHz, LOSEL = 5V, LO_TUNE1 = LO_TUNE2 = 1, PD1 = PD2 = STBY = 0,
TC = -40°C to +105°C. Typical values are at VCC = 3.3V, PLO = 0dBm, fLO = 2350MHz, LO_TUNE1 = LO_TUNE2 = 1, TC = +25°C,
unless otherwise noted.) (Notes 5, 6)
5V DC Electrical Characteristics (continued)
(Typical Application Circuit, VCC=4.75Vto5.25V,R1=4.87kΩ,R3=154kΩtoVCC,RFandIFsingleendedports=50ΩtoGND,
LO1portdrivenfrom50Ωsource,PLO = 0dBm, fLO = 2350MHz, LOSEL = 5V, LO_TUNE1 = LO_TUNE2 = 1, PD1 = PD2 = STBY = 0,
TC = -40°C to +105°C. Typical values are at VCC = 5.0V, PLO = 0dBm, fLO = 2350MHz, LO_TUNE1 = LO_TUNE2 = 1, TC = +25°C,
unless otherwise noted.) (Notes 5, 6)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Single-Channel Operation
Supply Current ISINGLECH PD1 = 0, PD2 = 1 or PD1 = 1, PD2 = 1 163 197 mA
Power-Down Supply Current IPD PD1 = 1, PD2 = 0 5.3 8.5 mA
Standby (STBY) Supply Current ISTBY STBY = 1 in any power-down mode 35 49 mA
LOSEL, PD1, PD2, STBY,
LO_TUNE1, LO_TUNE2,
Input High Voltage
VIH 1.17 V
LOSEL, PD1, PD2, STBY
LO_TUNE1, LO_TUNE2,
Input Low Voltage
VIL 0.5 V
Control Logic Input Current IIL and IIH
VIL > -0.25; VIH < VCC + 0.25V;
internal50kΩpulldownresistors -50 +250 µA
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage VCC 3.1 3.3 3.5 V
Dual-Channel Operation
Supply Current IDUALCH Total supply current 305 385 mA
Single-Channel Operation
Supply Current ISINGLECH PD1 = 0, PD2 = 1 or PD1 = 1, PD2 = 1 163 mA
Power-Down Supply Current IPD PD1 = 1, PD2 = 0 3.5 mA
Standby (STBY) Supply Current ISTBY STBY = 1 in any power-down mode 33 mA
LOSEL, PD1, PD2, STBY,
LO_TUNE1, LO_TUNE2,
Input High Voltage
VIH 1.0 V
LOSEL, PD1, PD2, STBY,
LO_TUNE1, LO_TUNE2,
Input Low Voltage
VIL 0.75 V
Control Logic Input Current IIL and IIH
VIL > -0.25; VIH < VCC + 0.25V;
internal50kΩpulldownresistors 0 to 100 µA
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
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4
Recommended AC Operating Conditions
5V AC Electrical Characteristics (Low-Side LO)
(Typical Application Circuit,R1=4.87kΩ,R3=154kΩtoVCC, VCC=4.75Vto5.25V,RFandLOportsaredrivenfrom50Ωsources,
PRF = -5dBm, fRF = 2550MHz, fLO = 2350MHz, fIF = 200MHz, PLO1 = -3dBm to +3dBm, LOSEL = 1, LO_TUNE1 = LO_TUNE2 = 1,
PD1 = PD2 = STBY = 0, TC = -40°C to +105°C. Typical values are at VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 2550MHz,
fLO = 2350MHz, LO_TUNE1 = LO_TUNE2 = 1, fIF = 200MHz, and TC = +25°C.) (Notes 5, 6)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RF Frequency fRF (Note 7) 1700 2700 MHz
LO Frequency fLO (Note 7) 1800 2600 MHz
IF Frequency (Note 7) fIF
UsingMini-CircuitsTC4-1W-174:1
transformerasdenedintheTypical
Application Circuit; IF matching components
affect the IF frequency range
100 500
MHz
Using alternative Mini-Circuits
TC4-1W-7A4:1transformerasdenedin
the Typical Application Circuit, IF matching
components affect the IF frequency range
50 250
LO Drive Level PLO -3 +3 dBm
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Conversion Gain GC
7.4 8.8 9.9 dB
TC = +25°C 8.1 8.8 9.7
RF Gain Flatness Flatness over any 120MHz portion of the RF
band, fIF = 200MHz 0.10 dB
Conversion Gain Flatness GFREQ
Flatness over a 100MHz RF band,
fIF = 200 ±50MHz (Note 9) 0.34 0.55 dB
Gain Variation Over Temperature TCCG TC = -40°C to +105°C -0.010 dB/°C
1σGainDeviation TC = -40°C to +105°C 0.082 dB
Input 1dB Compression Point IP1dB (Notes 8, 9) 11 13.1 dBm
Output 1dB Compression Point OP1dB (Notes 8, 9) 17 20.9 dBm
Input 0.1dB Compression Point IP0.1dB (Note 9) 4 5.6 dBm
Small-Signal Compression Under
Blocking Conditions
PRF = -5dBm, fBLOCKER = 2545MHz,
PBLOCKER = 8dBm (Note 8) 0.4 dB
Input Third-Order Intercept Point IIP3
fRF1-fRF2 = 1MHz,
PRF = -5dBm/tone
(Notes 9,10)
TC = +25°C 23.9 25.3
dBm
23.5 25.3
Input Third-Order Intercept Point
1σDeviation IIP3dev fRF1-fRF2 = 1MHz, PRF = -5dBm/tone 0.17 dBm
Input Third-Order Intercept Point
Variation Over Temperature TCIIP3
fRF1-fRF2 = 1MHz, PRF = -5dBm/tone,
TC = -40°C to +105°C 0.0035 dB/°C
Output Third-Order Intercept
Point OIP3
fRF1-fRF2 = 1MHz,
PRF = -5dBm/tone
(Notes 9, 10)
TC = +25°C 30.8 34.1
dBm
30.4 34.1
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
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│
5
5V AC Electrical Characteristics (Low-Side LO) (continued)
(Typical Application Circuit,R1=4.87kΩ,R3=154kΩtoVCC, VCC=4.75Vto5.25V,RFandLOportsaredrivenfrom50Ωsources,
PRF = -5dBm, fRF = 2550MHz, fLO = 2350MHz, fIF = 200MHz, PLO1 = -3dBm to +3dBm, LOSEL = 1, LO_TUNE1 = LO_TUNE2 = 1,
PD1 = PD2 = STBY = 0, TC = -40°C to +105°C. Typical values are at VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 2550MHz,
fLO = 2350MHz, LO_TUNE1 = LO_TUNE2 = 1, fIF = 200MHz, and TC = +25°C.) (Notes 5, 6)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Noise Figure, Single Sideband
(Note 9) NFSSB
TC = +25°C, no blockers present, RF trace
de-embedded 10.4 10.9
dB
No blockers present, RF trace de-
embedded, TC = -40°C to +100°C 10.4 12.2
Noise Figure Temperature
Coefcient TCNF
Single sideband, no blockers present,
TC = -40°C to +105°C 0.0166 dB/°C
1σNFdeviation NFSTD 0.09 dB
Noise Figure with Blocker NFB
PBLOCKER = 8dBm, fBLOCKER = 2300MHz,
fRF = 2200MHz, fLO = 1950MHz,
fIFDESIRED = 250MHz, fIFBLOCKER =
350MHz PLO = 0dBm, VCC = 5.0V,
TC = +25°C (Notes 9, 11)
18.3 20 dB
2RF - 2LO Spur Rejection
(Note 9) 2 x 2 fSPUR = fLO +
100MHz
PRF = -10dBm 63 73
dBc
PRF = -5dBm
(Note 10) 58 68
3RF - 3LO Spur Rejection
(Note 9) 3 x 3 fSPUR = fLO +
66.667MHz
PRF = -10dBm 75 91
dBc
PRF = -5dBm
(Note 10) 65 81
LO Leakage at RF Port PLO = 3dBm (Note 9) -39.8 -34 dBm
2LO Leakage at RF Port PLO = 3dBm (Note 9) -24.3 -20 dBm
3LO Leakage at RF Port PLO = 3dBm (Note 9) -46 -40 dBm
4LO Leakage at RF Port PLO = 3dBm (Note 9) -31 -22 dBm
LO Leakage at IF Port PLO = 3dBm (Notes 9, 10) -25.5 -23 dBm
LO Leakage at IF Port PLO = 3dBm, FLO = 2150MHz, (Note 10) -19.9 dBm
2LO Leakage at IF Port PLO = 3dBm -37 dBm
RF to IF Isolation (Notes 9, 10) 30 37.3 dB
LO1 to LO2 Isolation PLO1 = 3dBm, PLO2 = 3dBm, fLO1-fLO2 =
1MHz, PRF = -5dBm (Note 12) 30 50 dB
Channel-to-Channel Isolation
PRF = -10dBm, RFMAIN (RFDIV) power
measured at IFDIV (IFMAIN), relative to
IFMAIN (IFDIV), all unused ports terminated
to50Ω(Notes9,10)
40 46 dB
LO Switching Time 50% of LOSEL to IF settled within two
degrees 0.24 µs
Power-Down IF Attenuation
0dBm at RF & LO ports; IF output power
reduction from PD1 and PD2 switched from
0 to 1
40 61 dB
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
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│
6
5V AC Electrical Characteristics (Low-Side LO) (continued)
(Typical Application Circuit,R1=4.87kΩ,R3=154kΩtoVCC, VCC=4.75Vto5.25V,RFandLOportsaredrivenfrom50Ωsources,
PRF = -5dBm, fRF = 2550MHz, fLO = 2350MHz, fIF = 200MHz, PLO1 = -3dBm to +3dBm, LOSEL = 1, LO_TUNE1 = LO_TUNE2 = 1,
PD1 = PD2 = STBY = 0, TC = -40°C to +105°C. Typical values are at VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 2550MHz,
fLO = 2350MHz, LO_TUNE1 = LO_TUNE2 = 1, fIF = 200MHz, and TC = +25°C.) (Notes 5, 6)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Power-Down Time
PD1 and PD2 switched from 0 to 1. Settled
towithin5%ofthenalpowerdownDC
current.
20 ns
Power-Down Recovery Time
PD1 and PD2 switched from 1 to 0. The
‘on’stateisdenedasIFphasesettledto
within<±1°ofthenalvalueinastatic
measurement.
0.55 µs
STBY Time STBY switched from 0 to 1. Settled to within
5%ofthenalshutdownDCcurrent. 20 ns
STBY Recovery Time
STBY switched from 1 to 0. The ‘on’ state is
denedasIFphasesettledtowithin
<±1°ofthenalvalueinastatic
measurement.
0.5 µs
RF Input Impedance ZRF 50 Ω
RF Return Loss LO on and IF terminated 20 dB
LO Input Impedance ZLO 50 Ω
LO Return Loss LO port selected 16 dB
LO port unselected 17
IF Output Impedance ZIF
Nominal differential impedance at the IC’s
IF outputs 200 Ω
IF Return Loss
RFterminatedinto50Ω,LOdrivenby
50Ωsource,IFtransformedto50Ωusing
external components shown in the Typical
Application Circuit
30 dB
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
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7
5V AC Electrical Characteristics (High-Side LO)
(Typical Application Circuit,R1=4.87kΩ,R3=154kΩtoVCC, VCC=4.75Vto5.25V,RFandLOportsaredrivenfrom50Ωsources,
PLO1 = -3dBm to +3dBm, PRF = -5dBm, fRF = 2150MHz, fLO = 2350MHz, fIF = 200MHz, LOSEL = 1, LO_TUNE1 = LO_TUNE2 = 1,
PD1 = PD2 = STBY = 0, TC = -40°C to +105°C. Typical values are at VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 2150MHz,
fLO = 2350MHz, LO_TUNE1 = LO_TUNE2 = 1, fIF = 200MHz, and TC = +25°C.) (Notes 5, 6)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Conversion Gain GC
7.7 9.2 10.2 dB
TC = +25°C 8.4 9.2 10.1
RF Gain Flatness Flatness over any 120MHz portion of the RF
band, fIF = 200MHz 0.10 dB
Conversion Gain Flatness GFREQ
Flatness over a 100MHz RF band,
fIF = 200 ±50MHz 0.4 dB
Gain Variation Over Temperature TCCG TC = -40°C to +105°C -0.010 dB/°C
1σGainDeviation 0.08 dB
Input 1dB Compression Point IP1dB (Notes 8, 9) 10.3 12.6 dBm
Output 1dB Compression Point OP1dB (Notes 8, 9) 17.0 20.8 dBm
Input 0.1dB Compression Point IP0.1dB 7.1 dBm
Small-Signal Compression Under
Blocking Conditions
PRF = -5dBm, fBLOCKER = 2155MHz
PBLOCKER = 8dBm (Note 8) 0.4 dB
Input Third-Order Intercept Point IIP3 fRF1 - fRF2 = 1MHz, PRF = -5dBm/tone 24.7 dBm
Input Third-Order Intercept Point
1σDeviation IIP3dev fRF1 - fRF2 = 1MHz, PRF = -5dBm/tone 0.15 dBm
Input Third-Order Intercept Point
Variation Over Temperature TCIIP3
fRF1 - fRF2 = 1MHz, PRF = -5dBm/tone,
TC = -40°C to +105°C -0.01 dB/°C
Output Third-Order Intercept
Point OIP3 fRF1 - fRF2 = 1MHz, PRF = -5dBm/tone 34 dBm
Noise Figure, Single Sideband NFSSB No blockers present 10.0 dB
Noise Figure Temperature
Coefcient TCNF
Single sideband, no blockers present,
TC = -40°C to +105°C 0.017 dB/°C
Noise Figure with Blocker NFB
PBLOCKER = 8dBm, fBLOCKER = 1950MHz,
fRF = 2050MHz, fLO = 2300MHz,
fIFDESIRED = 250MHz, fIFBLOCKER =
350MHz (Note 11)
18.4 dB
2LO–2RFSpurRejection 2 x 2 fSPUR = fLO -
100MHz
PRF = -10dBm 85 dBc
PRF = -5dBm 80 dBc
3LO–3RFSpurRejection 3 x 3 fSPUR = fLO -
66.667MHz
PRF = -10dBm 85.5 dBc
PRF = -5dBm 75.5 dBc
LO Leakage at RF Port PLO = 3dBm -40 dBm
2LO Leakage at RF Port PLO = 3dBm -24 dBm
3LO Leakage at RF Port PLO = 3dBm -40 dBm
4LO Leakage at RF Port PLO = 3dBm -30 dBm
LO Leakage at IF Port PLO = 3dBm (Note 10) -25.5 dBm
2LO Leakage at IF Port PLO = 3dBm -37 dBm
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
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│
8
5V AC Electrical Characteristics (High-Side LO) (continued)
(Typical Application Circuit,R1=4.87kΩ,R3=154kΩtoVCC, VCC=4.75Vto5.25V,RFandLOportsaredrivenfrom50Ωsources,
PLO1 = -3dBm to +3dBm, PRF = -5dBm, fRF = 2150MHz, fLO = 2350MHz, fIF = 200MHz, LOSEL = 1, LO_TUNE1 = LO_TUNE2 = 1,
PD1 = PD2 = STBY = 0, TC = -40°C to +105°C. Typical values are at VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 2150MHz,
fLO = 2350MHz, LO_TUNE1 = LO_TUNE2 = 1, fIF = 200MHz, and TC = +25°C.) (Notes 5, 6)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RF to IF Isolation (Note 10) 34 dB
LO1 to LO2 Isolation
PLO1 = 3dBm, PLO2 = 3dBm,
fLO1 - fLO2 = 1MHz, PRF = -5dBm
(Note 12)
30 50 dB
Channel-to-Channel Isolation
PRF = -10dBm, RFMAIN (RFDIV) power
measured at IFDIV (IFMAIN), relative to
IFMAIN (IFDIV), all unused ports terminated
to50Ω,(Note10)
50 dB
LO Switching Time 50% of LOSEL to IF settled within two
degrees 0.24 µs
Power-Down IF Attenuation
0dBm at RF & LO ports;
IF output power reduction from
PD1 and PD2 switched from 0 to 1
40 61 dB
Power-Down Time
PD1 and PD2 switched from 0 to 1. Settled
towithin5%ofthenalpowerdownDC
current.
20 ns
Power-Down Recovery Time
PD1 and PD2 switched from 1 to 0. The
‘on’stateisdenedasIFphasesettledto
within<±1°ofthenalvalueinastatic
measurement.
0.55 µs
STBY Time STBY switched from 0 to 1. Settled to within
5%ofthenalshutdownDCcurrent. 20 ns
STBY Recovery Time
STBY switched from 1 to 0. The ‘on’ state is
denedasIFphasesettledtowithin<±1°
ofthenalvalueinastaticmeasurement.
0.5 µs
RF Input Impedance ZRF 50 Ω
RF Return Loss LO on and IF terminated 20 dB
LO Input Impedance ZLO 50 Ω
LO Return Loss LO port selected 16 dB
LO port unselected 17
IF Output Impedance ZIF
Nominal differential impedance at the IC’s
IF outputs 200 Ω
IF Return Loss
RFterminatedinto50Ω,LOdrivenby
50Ωsource,IFtransformedto50Ωusing
external components shown in the Typical
Application Circuit.
30 dB
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
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3.3V AC Electrical Characteristics (Low-Side LO)
(Typical Application Circuit,R1=4.87kΩ,R3=154kΩtoVCC,RFandLOportsaredrivenfrom50Ωsources.Typicalvaluesareat
VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 2550MHz, fLO = 2350MHz, fIF = 200MHz LO_TUNE1 = LO_TUNE2 = 1, PD1 = PD =
STBY = 0, and TC = +25°C.) (Note 6)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Conversion Gain GC 8.9 dB
Gain Variation Over Temperature TCCG TC = -40°C to +105°C 0.011 dB/°C
Input 1dB Compression Point IP1dB (Note 8) 10.2 dBm
Output 1dB Compression Point OP1dB (Note 8) 18.1 dBm
Input Third-Order Intercept Point IIP3 fRF1 - fRF2 = 1MHz, PRF = -5dBm/tone 24.1 dBm
Output Third-Order Intercept
Point OIP3 fRF1 - fRF2=1MHz, PRF = -5dBm/tone 33 dBm
Noise Figure, Single Sideband NFSSB
No blockers present, RF trace de-
embedded 10.3 dB
2RF - 2LO Spur Rejection 2 x 2 fSPUR = fLO +
100MHz
PRF = -10dBm 71 dBc
PRF = -5dBm 66 dBc
3RF - 3LO Spur Rejection 3 x 3 fSPUR = fLO +
66.667MHz
PRF = -10dBm 82 dBc
PRF = -5dBm 72 dBc
LO Leakage at RF Port PLO = 3dBm -36.6 dBm
2LO Leakage at RF Port PLO = 3dBm -22.6 dBm
LO Leakage at IF Port PLO = 3dBm -26.3 dBm
RF to IF Isolation 35.6 dB
Channel-to-Channel Isolation
PRF = -10dBm, RFMAIN (RFDIV) power
measured at IFDIV (IFMAIN), relative to
IFMAIN (IFDIV), all unused ports terminated
to50Ω
45.6 dB
LO Switching Time 50% of LOSEL to IF settled within two
degrees 0.24 us
RF Input Impedance ZRF 50 Ω
RF Return Loss LO on and IF terminated 20 dB
LO Input Impedance ZLO 50 Ω
LO Return Loss LO port selected 16 dB
LO port unselected 17
IF Output Impedance ZIF
Nominal differential impedance at the IC’s
IF outputs 200 Ω
IF Return Loss
RFterminatedinto50Ω,LOdrivenby
50Ωsource,IFtransformedto50Ωusing
external components shown in the Typical
Application Circuit.
30 dB
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
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Note 5: Production tested and guaranteed at TC = +25°C for worst-case supply voltage. Performance at TC = -40°C and +105°C
are guaranteed by production test characterization.
Note 6: All limits reflect 0.35dB loss for RF connectors and PCB RF trace, and 0.7dB loss for the IF transformer unless otherwise
noted .Output measurements taken at IF outputs with the Typical Application Circuit.
Note 7: Not production tested. Operation outside this range is possible, but with degraded performance of some parameters. See
Typical Operating Characteristics.
Note 8: MaximumreliablecontinuousinputpowerappliedtotheRForLOportofthisdeviceis15dBmfroma50Ωsource.
Note 9: Guaranteed by design and characterization. GBDC limits are 6-sigma.
Note 10: 100% production tested for functionality.
Note 11: Measured with external LO source noise filtered so the noise floor is -174dBm/Hz. This specification reflects the effects of
all SNR degradations in the mixer, including the LO noise as defined in Maxim ApplicationNote2021:Specifications and
Measurement of Local Oscillator Noise in Integrated Circuit Base Station Mixers.
Note 12: Measured at IF port at IF frequency. LOSEL may be in either logic state.
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
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Typical Operating Characteristics
(Typical Application Circuit, VCC = 5.0V, fRF = 2000MHz to 2700MHz, LO is low-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
NOISE FIGURE vs. RF FREQUENCY
MAX19757 toc09
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
252523502175
9
8
10
11
12
13
7
2000 2700
VCC = 4.75V, 5.0V, 5.25V
NOISE FIGURE vs. RF FREQUENCY
MAX19757 toc08
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
252523502175
9
8
10
11
12
13
7
2000 2700
PLO = -3dBm, 0dBm, +3dBm
NOISE FIGURE vs. RF FREQUENCY
MAX19757 toc07
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
252523502175
9
8
10
11
12
13
7
2000 2700
TC = -40°C
TC = +25°C
TC = +85°C
TC = +105°C
INPUT IP3 vs. RF FREQUENCY
MAX19757 toc06
INPUT IP3 (dBm)
24
25
26
27
23
RF FREQUENCY (MHz)
2525235021752000 2700
PRF = -5dBm/ TONE
VCC = 4.75V
VCC = 5.0V
VCC = 5.25V
INPUT IP3 vs. RF FREQUENCY
MAX19757 toc05
INPUT IP3 (dBm)
24
25
26
27
23
RF FREQUENCY (MHz)
2525235021752000 2700
PRF = -5dBm/ TONE
PLO = -3dBm, 0dBm, 3dBm
INPUT IP3 vs. RF FREQUENCY
MAX19757 toc04
INPUT IP3 (dBm)
24
25
26
27
23
RF FREQUENCY (MHz)
2525235021752000 2700
TC = -40°C
TC = +105°C
TC = +25°C
PRF = -5dBm/ TONE
CONVERSION GAIN vs. RF FREQUENCY
MAX19757 toc03
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
252523502175
7
8
9
10
11
6
2000 2700
VCC = 4.75V, 5.0V, 5.25V
CONVERSION GAIN vs. RF FREQUENCY
MAX19757 toc02
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
252523502175
7
8
9
10
11
6
2000 2700
PLO = -3dBm, 0dBm, +3dBm
CONVERSION GAIN vs. RF FREQUENCY
MAX19757 toc01
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
252523502175
7
8
9
10
11
6
2000 2700
TC = +105°C TC = +25°C
TC = -40°C
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
Maxim Integrated
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 5.0V, fRF = 2000MHz to 2700MHz, LO is low-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
2RF - 2LO RESPONSE
vs. RF FREQUENCY
MAX19757 toc10
RF FREQUENCY (MHz)
2RF - 2LO RESPONSE (dBc)
252523502175
80
50
2000 2700
TC = +25°C
TC = -40°C
TC = +105°C
60
70
PRF = -5dBm
2RF - 2LO RESPONSE
vs. RF FREQUENCY
MAX19757 toc11
RF FREQUENCY (MHz)
2RF - 2LO RESPONSE (dBc)
252523502175
80
50
2000 2700
60
70
PRF = -5dBm
PLO = -3dBm
PLO = 0dBm
PLO = +3dBm
2RF - 2LO RESPONSE
vs. RF FREQUENCY
MAX19757 toc12
RF FREQUENCY (MHz)
2RF - 2LO RESPONSE (dBc)
252523502175
80
50
2000 2700
60
70
PRF = -5dBm
VCC = 4.75V, 5.0V, 5.25V
3RF - 3LO RESPONSE
vs. RF FREQUENCY
MAX19757 toc13
3RF - 3LO RESPONSE (dBc)
65
75
85
95
55
RF FREQUENCY (MHz)
2525235021752000 2700
TC = -40°C
TC = +105°C
TC = +25°C
PRF = -5dBm
3RF - 3LO RESPONSE
vs. RF FREQUENCY
MAX19757 toc14
3RF - 3LO RESPONSE (dBc)
65
75
85
95
55
RF FREQUENCY (MHz)
2525235021752000 2700
PRF = -5dBm
PLO = -3dBm, 0dBm, +3dBm
3RF - 3LO RESPONSE
vs. RF FREQUENCY
MAX19757 toc15
3RF - 3LO RESPONSE (dBc)
65
75
85
95
55
RF FREQUENCY (MHz)
2525235021752000 2700
PRF = -5dBm
VCC = 4.75V, 5.0V, 5.25V
INPUT P1dB vs. RF FREQUENCY
MAX19757 toc16
RF FREQUENCY (MHz)
INPUT P1dB (dBm)
252523502175
11
12
13
14
15
10
2000 2700
TC = +105°C
TC = +25°C
TC = -40°C
INPUT P1dB vs. RF FREQUENCY
MAX19757 toc17
RF FREQUENCY (MHz)
INPUT P1dB (dBm)
252523502175
11
12
13
14
15
10
2000 2700
PLO = -3dBm, 0dBm, +3dBm
INPUT P1dB vs. RF FREQUENCY
MAX19757 toc18
RF FREQUENCY (MHz)
INPUT P1dB (dBm)
252523502175
11
12
13
14
15
10
2000 2700
VCC = 5.25V
VCC = 4.75V
VCC = 5.0V
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 5.0V, fRF = 2000MHz to 2700MHz, LO is low-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
CHANNEL ISOLATION
vs. RF FREQUENCY
MAX19757 toc19
RF FREQUENCY (MHz)
CHANNEL ISOLATION (dB)
252523502175
35
40
45
50
55
30
2000 2700
TC = +25°C
TC = +105°C
TC = -40°C
CHANNEL ISOLATION
vs. RF FREQUENCY
MAX19757 toc20
RF FREQUENCY (MHz)
CHANNEL ISOLATION (dB)
252523502175
35
40
45
50
55
30
2000 2700
PLO = -3dBm, 0dBm, +3dBm
CHANNEL ISOLATION
vs. RF FREQUENCY
MAX19757 toc21
RF FREQUENCY (MHz)
CHANNEL ISOLATION (dB)
252523502175
35
40
45
50
55
30
2000 2700
VCC = 4.75V, 5.0V, 5.25V
LO LEAKAGE AT IF PORT
vs. LO FREQUENCY
MAX19757 toc22
LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT (dBm)
232521501975
-30
-20
-10
-40
1800 2500
TC = -40°C, +25°C, +105°C
LO LEAKAGE AT IF PORT
vs. LO FREQUENCY
MAX19757 toc23
LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT (dBm)
232521501975
-30
-20
-10
-40
1800 2500
PLO = -3dBm, 0dBm, +3dBm
LO LEAKAGE AT IF PORT
vs. LO FREQUENCY
MAX19757 toc24
LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT (dBm)
232521501975
-30
-20
-10
-40
1800 2500
VCC = 4.75V, 5.0V, 5.25V
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX19757 toc25
RF FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
252523502175
50
20
2000 2700
30
40
TC = -40°C
TC = +105°CTC = +25°C
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX19757 toc26
RF FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
252523502175
50
20
2000 2700
30
40
PLO = -3dBm, 0dBm, +3dBm
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX19757 toc27
RF FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
252523502175
50
20
2000 2700
30
40
VCC = 4.75V, 5.0V, 5.25V
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
Maxim Integrated
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 5.0V, fRF = 2000MHz to 2700MHz, LO is low-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
2LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc33
2LO LEAKAGE AT RF PORT (dBm)
-40
-30
-20
-10
-50
LO FREQUENCY (MHz)
240021001800 2700
VCC = 4.75V, 5.0V, 5.25V
2LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc32
2LO LEAKAGE AT RF PORT (dBm)
-40
-30
-20
-10
-50
LO FREQUENCY (MHz)
240021001800 2700
PLO = -3dBm, 0dBm, +3dBm
2LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc31
2LO LEAKAGE AT RF PORT (dBm)
-40
-30
-20
-10
-50
LO FREQUENCY (MHz)
240021001800 2700
TC = +105°C
TC = -40°C TC = +25°C
LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc30
LO LEAKAGE AT RF PORT (dBm)
-45
-40
-35
-30
-50
LO FREQUENCY (MHz)
240021001800 2700
VCC = 4.75V, 5.0V, 5.25V
LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc29
LO LEAKAGE AT RF PORT (dBm)
-45
-40
-35
-30
-50
LO FREQUENCY (MHz)
240021001800 2700
PLO = -3dBm, 0dBm, +3dBm
LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc28
LO LEAKAGE AT RF PORT (dBm)
-45
-40
-35
-30
-50
LO FREQUENCY (MHz)
240021001800 2700
TC = -40°C
TC = +105°C
TC = +25°C
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 5.0V, fRF = 2000MHz to 2700MHz, LO is low-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
SUPPLY CURRENT vs. LO FREQUENCY
MAX19757 toc37
LO FREQUENCY (MHz)
SUPPLY CURRENT (mA)
245022001950
400
250
1700 2700
300
350
TUNE 0,1
TUNE 0,0
TUNE 1,1 TUNE 1,0
LO PORT RETURN LOSS
vs. LO FREQUENCY
MAX19757 toc36
LO FREQUENCY (MHz)
LO PORT RETURN LOSS (dB)
2300210019001700
20
15
10
5
0
25
1500 2500
IF PORT RETURN LOSS
vs. IF FREQUENCY
MAX19757 toc35
IF FREQUENCY (MHz)
IF PORT RETURN LOSS (dB)
410320230140
30
20
10
0
40
50 500
LO = 2350MHz
RF PORT RETURN LOSS
vs. RF FREQUENCY
MAX19757 toc34
RF PORT RETURN LOSS (dB)
30
20
10
0
40
RF FREQUENCY (MHz)
25252175 23502000 2700
TUNE 0,1
TUNE 1,1
TUNE 1,0
TUNE 0,0
IF = 200MHz
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 5.0V, fRF = 1700MHz to 2800MHz, LO is high-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
NOISE FIGURE vs. RF FREQUENCY
MAX19757 toc46
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
222520501875
8
9
10
11
12
13
7
1700 2400
VCC = 4.75V, 5.0V, 5.25V
NOISE FIGURE vs. RF FREQUENCY
MAX19757 toc45
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
222520501875
8
9
10
11
12
13
7
1700 2400
PLO = -3dBm, 0dBm, +3dBm
NOISE FIGURE vs. RF FREQUENCY
MAX19757 toc44
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
222520501875
8
9
10
11
12
13
7
1700 2400
TC = -40°C
TC = +25°C
TC = +85°C
TC = +105°C
INPUT IP3 vs. RF FREQUENCY
MAX19757 toc43
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
252522501975
24
25
26
27
23
1700 2800
VCC = 4.75V, 5.0V, 5.25V
PRF = -5dBm/TONE
INPUT IP3 vs. RF FREQUENCY
MAX19757 toc42
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
252522501975
24
25
26
27
23
1700 2800
PLO = -3dBm, 0dBm, 3dBm
PRF = -5dBm/TONE
INPUT IP3 vs. RF FREQUENCY
MAX19757 toc41
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
252522501975
24
25
26
27
23
1700 2800
TC = -40°C
TC = +25°C
TC = +105°C
PRF = -5dBm/TONE
CONVERSION GAIN vs. RF FREQUENCY
MAX19757 toc40
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
252522501975
7
8
9
10
11
6
1700 2800
VCC = 4.75V, 5.0V, 5.25V
CONVERSION GAIN vs. RF FREQUENCY
MAX19757 toc39
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
252522501975
7
8
9
10
11
6
1700 2800
PLO = -3dBm, 0dBm, +3dBm
CONVERSION GAIN vs. RF FREQUENCY
MAX19757 toc38
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
252522501975
7
8
9
10
11
6
1700 2800
TC = +25°C
TC = +105°C
TC = -40°C
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
Maxim Integrated
│
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 5.0V, fRF = 1700MHz to 2800MHz, LO is high-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
INPUT P1dB vs. RF FREQUENCY
MAX19757 toc55
RF FREQUENCY (MHz)
INPUT P1dB (dBm)
252522501975
12
13
14
11
1700 2800
VCC = 4.75V
VCC = 5.25V
VCC = 5.0V
INPUT P1dB vs. RF FREQUENCY
MAX19757 toc54
RF FREQUENCY (MHz)
INPUT P1dB (dBm)
252522501975
12
13
14
11
1700 2800
PLO = -3dBm, 0dBm, +3dBm
INPUT P1dB vs. RF FREQUENCY
MAX19757 toc53
RF FREQUENCY (MHz)
INPUT P1dB (dBm)
252522501975
12
13
14
11
1700 2800
TC = -40°C
TC = +25°C
TC = +105°C
3LO - 3RF RESPONSE
vs. RF FREQUENCY
MAX19757 toc52
RF FREQUENCY (MHz)
3LO-3RF RESPONSE (dBc)
252522501975
60
70
80
90
100
50
1700 2800
PRF = -5dBm
VCC = 4.75V, 5.0V, 5.25V
3LO - 3RF RESPONSE
vs. RF FREQUENCY
MAX19757 toc51
RF FREQUENCY (MHz)
3LO-3RF RESPONSE (dBc)
252522501975
60
70
80
90
100
50
1700 2800
PRF = -5dBm
PLO = -3dBm, 0dBm, +3dBm
3LO - 3RF RESPONSE
vs. RF FREQUENCY
MAX19757 toc50
RF FREQUENCY (MHz)
3LO-3RF RESPONSE (dBc)
252522501975
60
70
80
90
100
50
1700 2800
PRF = -5dBm
TC = -40°C
TC = +25°C
TC = +105°C
2LO - 2RF RESPONSE
vs. RF FREQUENCY
MAX19757 toc49
RF FREQUENCY (MHz)
2LO-2RF RESPONSE (dBc)
252522501975
60
70
80
90
100
50
1700 2800
VCC = 4.75V, 5.0V, 5.25V
PRF = -5dBm
2LO - 2RF RESPONSE
vs. RF FREQUENCY
MAX19757 toc48
RF FREQUENCY (MHz)
2LO-2RF RESPONSE (dBc)
252522501975
60
70
80
90
100
50
1700 2800
PLO = -3dBm
PLO = +3dBm
PLO = 0dBm
PRF = -5dBm
2LO - 2RF RESPONSE
vs. RF FREQUENCY
MAX19757 toc47
RF FREQUENCY (MHz)
2LO-2RF RESPONSE (dBc)
252522501975
60
70
80
90
100
50
1700 2800
TC = +25°C
TC = -40°C
TC = +105°C PRF = -5dBm
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
Maxim Integrated
│
18
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 5.0V, fRF = 1700MHz to 2800MHz, LO is high-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
RF-TO-IF ISOLATION
vs. RF FREQUENCY
MAX19757 toc64
RF FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
252522501975
30
40
50
20
1700 2800
VCC = 4.75V, 5.0V, 5.25V
RF-TO-IF ISOLATION
vs. RF FREQUENCY
MAX19757 toc63
RF FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
252522501975
30
40
50
20
1700 2800
PLO = -3dBm, 0dBm, +3dBm
RF-TO-IF ISOLATION
vs. RF FREQUENCY
MAX19757 toc62
RF FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
252522501975
30
40
50
20
1700 2800
TC = -40°C, +25°C, +105°C
LO LEAKAGE AT IF PORT
vs. LO FREQUENCY
MAX19757 toc61
LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT (dBm)
272524502175
-30
-20
-10
-40
1900 3000
VCC = 4.75V, 5.0V, 5.25V
LO LEAKAGE AT IF PORT
vs. LO FREQUENCY
MAX19757 toc60
LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT (dBm)
272524502175
-30
-20
-10
-40
1900 3000
PLO = -3dBm, 0dBm, +3dBm
LO LEAKAGE AT IF PORT
vs. LO FREQUENCY
MAX19757 toc59
LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT (dBm)
272524502175
-30
-20
-10
-40
1900 3000
TC = -40°C, +25°C, +105°C
CHANNEL ISOLATION
vs. RF FREQUENCY
MAX19757 toc58
RF FREQUENCY (MHz)
CHANNEL ISOLATION (dB)
252522501975
35
40
45
50
55
30
1700 2800
VCC = 4.75V, 5.0V, 5.25V
CHANNEL ISOLATION
vs. RF FREQUENCY
MAX19757 toc57
RF FREQUENCY (MHz)
CHANNEL ISOLATION (dB)
252522501975
35
40
45
50
55
30
1700 2800
PLO = -3dBm, 0dBm, +3dBm
CHANNEL ISOLATION
vs. RF FREQUENCYY
MAX19757 toc56
RF FREQUENCY (MHz)
CHANNEL ISOLATION (dB)
252522501975
35
40
45
50
55
30
1700 2800
TC = +105°C
TC = -40°C
TC = +25°C
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
Maxim Integrated
│
19
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 5.0V, fRF = 1700MHz to 2800MHz, LO is high-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
2LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc70
LO FREQUENCY (MHz)
2LO LEAKAGE AT RF PORT (dBm)
24002100
-40
-30
-20
-10
-50
1800 2700
VCC = 4.75V, 5.0V, 5.25V
2LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc69
LO FREQUENCY (MHz)
2LO LEAKAGE AT RF PORT (dBm)
24002100
-40
-30
-20
-10
-50
1800 2700
PLO = -3dBm, 0dBm, +3dBm
2LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc68
LO FREQUENCY (MHz)
2LO LEAKAGE AT RF PORT (dBm)
24002100
-40
-30
-20
-10
-50
1800 2700
TC = -40°C TC = +25°C
TC = +105°C
LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc67
LO FREQUENCY (MHz)
LO LEAKAGE AT RF PORT (dBm)
24002100
-45
-40
-35
-30
-50
1800 2700
VCC = 4.75V, 5.0V, 5.25V
LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc66
LO FREQUENCY (MHz)
LO LEAKAGE AT RF PORT (dBm)
24002100
-45
-40
-35
-30
-50
1800 2700
PLO = -3dBm, 0dBm, +3dBm
LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc65
LO FREQUENCY (MHz)
LO LEAKAGE AT RF PORT (dBm)
24002100
-45
-40
-35
-30
-50
1800 2700
TC = +105°C
TC = -40°C
TC = +25°C
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
Maxim Integrated
│
20
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 5.0V, fRF = 1700MHz to 2800MHz, LO is high-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
SUPPLY CURRENT vs. LO FREQUENCY
MAX19757 toc74
LO FREQUENCY (MHz)
SUPPLY CURRENT (mA)
245022001950
300
350
400
250
1700 2700
TUNE 1,0
TUNE 1,1
TUNE 0,0
TUNE 0,1
LO PORT RETURN LOSS
vs. LO FREQUENCY
MAX19757 toc73
LO FREQUENCY (MHz)
LO PORT RETURN LOSS (dB)
2300210019001700
20
15
10
5
0
25
1500 2500
IF PORT RETURN LOSS
vs. IF FREQUENCY
MAX19757 toc72
IF FREQUENCY (MHz)
IF PORT RETURN LOSS (dB)
410320230140
30
20
10
0
40
50 500
LO = 2350MHz
RF PORT RETURN LOSS
vs. RF FREQUENCY
MAX19757 toc71
RF FREQUENCY (MHz)
RF PORT RETURN LOSS (dB)
252522501975
30
20
10
0
40
1700 2800
TUNE 0,0
TUNE 0,1 TUNE 1,1
TUNE 1,0
IF = 200MHz
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
Maxim Integrated
│
21
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 3.3V, fRF = 2000MHz to 2700MHz, LO is low-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
NOISE FIGURE vs. RF FREQUENCY
MAX19757 toc83
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
252523502175
8
9
10
11
12
13
7
2000 2700
VCC = 3.1V, 3.3V, 3.5V
NOISE FIGURE vs. RF FREQUENCY
MAX19757 toc82
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
252523502175
8
9
10
11
12
13
7
2000 2700
PLO = -3dBm, 0dBm, +3dBm
NOISE FIGURE vs. RF FREQUENCY
MAX19757 toc81
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
252523502175
8
9
10
11
12
13
7
2000 2700
TC = -40°C
TC = +25°C
TC = +85°C
TC = +105°C
INPUT IP3 vs. RF FREQUENCY
MAX19757 toc80
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
252523502175
22
23
24
25
21
2000 2700
PRF = -5dBm/TONE
VCC = 3.1V
VCC = 3.5V
VCC = 3.3V
INPUT IP3 vs. RF FREQUENCY
MAX19757 toc79
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
252523502175
22
23
24
25
21
2000 2700
PLO = -3dBm, 0dBm, 3dBm
PRF = -5dBm/TONE
INPUT IP3 vs. RF FREQUENCY
MAX19757 toc78
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
252523502175
22
23
24
25
21
2000 2700
TC = +105°C
TC = -40°C
TC = +25°C
PRF = -5dBm/TONE
CONVERSION GAIN vs. RF FREQUENCY
MAX19757 toc77
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
252523502175
7
8
9
10
11
6
2000 2700
VCC = 3.1V, 3.3V, 3.5V
CONVERSION GAIN vs. RF FREQUENCY
MAX19757 toc76
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
252523502175
7
8
9
10
11
6
2000 2700
PLO = -3dBm, 0dBm, +3dBm
CONVERSION GAIN vs. RF FREQUENCY
MAX19757 toc75
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
252523502175
7
8
9
10
11
6
2000 2700
TC = +105°C
TC = -40°C
TC = +25°C
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
Maxim Integrated
│
22
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 3.3V, fRF = 2000MHz to 2700MHz, LO is low-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
INPUT P1dB vs. RF FREQUENCY
MAX19757 toc92
RF FREQUENCY (MHz)
INPUT P1dB (dBm)
252523502175
9
10
11
12
8
2000 2700
VCC = 3.1V
VCC = 3.3V
VCC = 3.5V
INPUT P1dB vs. RF FREQUENCY
MAX19757 toc91
RF FREQUENCY (MHz)
INPUT P1dB (dBm)
252523502175
9
10
11
12
8
2000 2700
PLO = -3dBm, 0dBm, +3dBm
INPUT P1dB vs. RF FREQUENCY
MAX19757 toc90
RF FREQUENCY (MHz)
INPUT P1dB (dBm)
252523502175
9
10
11
12
8
2000 2700
TC = -40°C
TC = +25°C
TC = +105°C
3RF - 3LO RESPONSE
vs. RF FREQUENCY
MAX19757 toc89
RF FREQUENCY (MHz)
3RF-3LO RESPONSE (dBc)
252523502175
65
75
85
55
2000 2700
PRF = -5dBm
VCC = 3.1V VCC = 3.5V
VCC = 3.3V
3RF - 3LO RESPONSE
vs. RF FREQUENCY
MAX19757 toc88
RF FREQUENCY (MHz)
3RF-3LO RESPONSE (dBc)
252523502175
65
75
85
55
2000 2700
PRF = -5dBm
PLO = -3dBm, 0dBm, +3dBm
3RF - 3LO RESPONSE
vs. RF FREQUENCY
MAX19757 toc87
RF FREQUENCY (MHz)
3RF-3LO RESPONSE (dBc)
252523502175
65
75
85
55
2000 2700
PRF = -5dBm
TC = +105°C
TC = -40°C
TC = +25°C
2RF - 2LO RESPONSE
vs. RF FREQUENCY
MAX19757 toc86
RF FREQUENCY (MHz)
2RF-2LO RESPONSE (dBc)
252523502175
65
75
85
55
2000 2700
PRF = -5dBm
VCC = 3.5V
VCC = 3.3V VCC = 3.1V
2RF - 2LO RESPONSE
vs. RF FREQUENCY
MAX19757 toc85
RF FREQUENCY (MHz)
2RF-2LO RESPONSE (dBc)
252523502175
60
70
80
50
2000 2700
PRF = -5dBm
PLO = +3dBm
PLO = 0dBm PLO = -3dBm
2RF - 2LO RESPONSE
vs. RF FREQUENCY
MAX19757 toc84
RF FREQUENCY (MHz)
2RF-2LO RESPONSE (dBc)
252523502175
60
70
80
50
2000 2700
TC = +105°C TC = -40°C
TC = +25°C
PRF = -5dBm
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
Maxim Integrated
│
23
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 3.3V, fRF = 2000MHz to 2700MHz, LO is low-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX19757 toc101
RF FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
252523502175
30
40
50
20
2000 2700
VCC = 3.1V, 3.3V, 3.5V
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX19757 toc100
RF FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
252523502175
30
40
50
20
2000 2700
PLO = -3dBm, 0dBm, +3dBm
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX19757 toc99
RF FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
252523502175
30
40
50
20
2000 2700
TC = +25°C
TC = -40°C
TC = +105°C
LO LEAKAGE AT IF PORT
vs. LO FREQUENCY
MAX19757 toc98
LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT (dBm)
232521501975
-30
-20
-10
-40
1800 2500
VCC = 3.1V, 3.3V, 3.5V
LO LEAKAGE AT IF PORT
vs. LO FREQUENCY
MAX19757 toc97
LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT (dBm)
232521501975
-30
-20
-10
-40
1800 2500
PLO = -3dBm, 0dBm, +3dBm
LO LEAKAGE AT IF PORT
vs. LO FREQUENCY
MAX19757 toc96
LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT (dBm)
232521501975
-30
-20
-10
-40
1800 2500
TC = +105°C
TC = +25°C
TC = -40°C
CHANNEL ISOLATION
vs. RF FREQUENCY
MAX19757 toc95
RF FREQUENCY (MHz)
CHANNEL ISOLATION (dB)
252523502175
35
40
45
50
55
30
2000 2700
VCC = 3.1V, 3.3V, 3.5V
CHANNEL ISOLATION
vs. RF FREQUENCY
MAX19757 toc94
RF FREQUENCY (MHz)
CHANNEL ISOLATION (dB)
252523502175
35
40
45
50
55
30
2000 2700
PLO = -3dBm, 0dBm, +3dBm
CHANNEL ISOLATION
vs. RF FREQUENCY
MAX19757 toc93
RF FREQUENCY (MHz)
CHANNEL ISOLATION (dB)
252523502175
35
40
45
50
55
30
2000 2700
TC = +105°C
TC = -40°C
TC = +25°C
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
Maxim Integrated
│
24
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 3.3V, fRF = 2000MHz to 2700MHz, LO is low-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
2LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc107
LO FREQUENCY (MHz)
2LO LEAKAGE AT RF PORT (dBm)
2100 2400
-30
-20
-10
-40
1800 2700
VCC = 3.1V, 3.3V, 3.5V
2LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc106
LO FREQUENCY (MHz)
2LO LEAKAGE AT RF PORT (dBm)
2100 2400
-30
-20
-10
-40
1800 2700
PLO = -3dBm, 0dBm, +3dBm
2LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc105
LO FREQUENCY (MHz)
2LO LEAKAGE AT RF PORT (dBm)
2100 2400
-30
-20
-10
-40
1800 2700
TC = -40°C
TC = +105°C
TC = +25°C
LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc104
LO FREQUENCY (MHz)
LO LEAKAGE AT RF PORT (dBm)
24002100
-45
-40
-35
-30
-50
1800 2700
VCC = 3.1V, 3.3V, 3.5V
LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc103
LO FREQUENCY (MHz)
LO LEAKAGE AT RF PORT (dBm)
24002100
-45
-40
-35
-30
-50
1800 2700
PLO = -3dBm, 0dBm, +3dBm
LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
MAX19757 toc102
LO FREQUENCY (MHz)
LO LEAKAGE AT RF PORT (dBm)
24002100
-45
-40
-35
-30
-50
1800 2700
TC = +105°C
TC = -40°C
TC = +25°C
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
Maxim Integrated
│
25
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Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 3.3V, fRF = 2000MHz to 2700MHz, LO is low-side injected for a 200MHz IF, PRF = -5dBm,
PLO = 0dBm, TC = +25°C, LO1 driven, LOSEL= 5V, STBY = PD1 = PD2 = GND, LOTUNE1 and LOTUNE2 set per Table 2, unless
otherwise noted.)
SUPPLY CURRENT vs. LO FREQUENCY
MAX19757 toc111
LO FREQUENCY (MHz)
SUPPLY CURRENT (mA)
245022001950
280
300
320
340
360
260
1700 2700
TUNE 1,0
TUNE 1,1
TUNE 0,1
TUNE 0,0
LO PORT RETURN LOSS
vs. LO FREQUENCY
MAX19757 toc110
LO FREQUENCY (MHz)
LO PORT RETURN LOSS (dB)
24002100
20
15
10
5
0
25
1800 2700
IF FREQUENCY (MHz)
IF PORT RETURN LOSS (dB)
410320230140
25
20
15
10
5
0
30
50 500
IF PORT RETURN LOSS
vs. IF FREQUENCY
MAX19757 toc109
LO = 2350MHz
RF PORT RETURN LOSS
vs. RF FREQUENCY
MAX19757 toc108
RF FREQUENCY (MHz)
RF PORT RETURN LOSS (dB)
252523502175
30
20
10
0
40
2000 2700
TUNE 1,1
TUNE 1,0
TUNE 0,1
TUNE 0,0
IF = 200MHZ
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
www.maximintegrated.com Maxim Integrated
│
26
Pin Conguration
MAX19757
+
LO_TUNE2
LO_VADJ
VCC
GND2
IFM-
IFM+
GND
IF_RADJ
VCC
LO_TUNE1
IF_DET_CEXT
VCC
GND1
IFD-
IFD+
GND
EP* IF_DET_OUT
VCC
28
29
30
31
32
33
34
35
36
27 26 25 24 23 22 21 20 19
123456789
18
17
16
15
14
13
12
11
10
LO2
GND
STBY
PD2
LOSEL
PD1
VCC
GND
LO1
RFMAIN
RFM_RTN
GND
VCC
GND
N.C.
GND
RFD_RTN
RFDIV
TQFN
(6mm x 6mm)
TOP VIEW
*EXPOSED PAD. INTERNALLY CONNECTED TO GND.
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
www.maximintegrated.com Maxim Integrated
│
27
Pin Description
PIN NAME FUNCTION
1 RFMAIN MainChannelRFInput.Internallymatchedto50Ω.RequiresaninputDC-blockingcapacitor.
2 RFM_RTN Main Channel RF return. Bypass to GND with capacitor close to the pin.
3, 5, 7, 12,
20, 26, 34 GND Ground
4, 10, 16,
21, 30, 36 VCC Power-Supply Input. Connect bypass capacitors as close to the pin as possible.
6 N.C. No Connection. This pin has no internal connection and can be left open or connected to ground.
8 RFD_RTN Diversity Channel RF Return. Bypass to GND with capacitor close to the pin.
9 RFDIV DiversityChannelRFInput.Internallymatchedto50Ω;requiresaninputDC-blockingcapacitor.
11 IF_DET_OUT
If auto-leveling loop is not used leave this pin unconnected.
If auto-leveling is desired connect resistor R2 and R3 to IF_DET_OUT and add a capacitor Cext (Pin
17) to ground (see the Optional Dynamic Bias Typical Application Circuit).
13, 14 IFD+, IFD- Diversity Mixer Differential IF Output. Connect pullup inductors from each of these pins to VCC.
15, 31 GND1, GND2 Connect these pins to a via to ground.
17 IF_DET_CEXT
If auto-leveling loop is not used leave this pin unconnected.
If auto leveling is used connect a capacitor to ground (see the Optional Dynamic Bias Typical
Application Circuit). This capacitor sets the detector decay rate.
18, 28 LO_TUNE1,
LO_TUNE2 2-BitLOTankTuning.SeeTable2fordesiredsettinginternal50kΩpulldownresistor.
19 LO1 LocalOscillator1Input.Thisinputisinternallymatchedto50Ω.RequiresaninputDC-blocking
capacitor.
22, 24 PD1, PD2 Power-DownControlPinLogic.SeeTable1fordesiredsetting.Internal50kΩpulldownresistor.
23 LOSEL Local Oscillator Select Input. Set LOSEL high to select LO1. Set LOSEL low to select LO2. Internal
50kΩpulldownresistor.
25 STBY Standby(Active-High).AllOffexceptBiasandselectedLOport.Internal50kΩpulldownresistor.
27 LO2 LocalOscillator2Input.Thisinputisinternallymatchedto50Ω.RequiresaninputDC-blocking
capacitor.
29 LO_VADJ LO Drive Amplitude Bias Control. Internally biased to VREF. Connect a resistor to VCC.
32, 33 IFM-, IFM+ Main Mixer Differential IF Output. Connect pullup inductors from each of these pins to VCC.
35 IF _RADJ IFAmplierBiasControlMode.Connectaresistorfromthispintogroundtosetthebiascurrentfor
theIFampliers.
— EP
Exposed Pad. Internally connected to GND. Solder this exposed pad to a PCB pad that uses
multiple ground vias to provide heat transfer out of the device into the PCB ground planes. These
multiple via grounds are also required to achieve the noted RF performance (see the Layout
Considerations section.)
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
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Detailed Description
The MAX19757 dual-channel downconverter is designed
to provide 8.8dB gain, 25.3dBm input IP3 and 10.4dB
NF for a multitude of 1700MHz to 2700MHz basestation
receiver applications. With an optimized LO frequency
range of 1800MHz to 2600MHz, this mixer supports both
high- and low-side LO injection architectures for 1700MHz
to 2200MHz and 2000MHz to 2700MHz RF bands,
respectively. Independent path shutdown allows the user
to save DC power during low-peak usage times or in TDD
TX mode.
The device integrates baluns in the RF and LO ports,
an LO buffer, two double-balanced mixers, and a pair of
differential IF output amplifiers. The MAX19757 requires
a typical LO drive of 0dBm and a supply current typically
300mA at band center and 350mA across the RF frequen-
cy band to achieve the targeted linearity performance.
Applications Information
Independent Channel Shutdown
Control pins PD1 and PD2 can be used to independently
enable/disable the two mixer channels. Table 1 sum-
marizes the relevant settings for enabling/disabling each
channel. Both channels can be switched on and off in uni-
son by tying PD2 to ground and switching PD1. The PD1
andPD2inputshaveaninternal50kΩpulldownresistor
which can be used to set a logic-low if left unconnected.
LO Port Select
As with most of Maxim’s Dual Rx mixers, the MAX19757
includes an LO select control (LOSEL) for use in systems
with multiple LO synthesizers. LOSEL controls the active
LO port selection. Setting LOSEL high (VCC) selects
LO port 1 while LOSEL low (ground) selects LO port 2.
TheLOSELinputhasaninternal50kΩpulldownresistor
which can be used to set a logic-low if left unconnected.
LO Buffer Standby Mode (Synthesizer Pulling
Prevention Feature)
To minimize LO port disturbances in transceiver systems
that reuse the LO for transmit, the active front-end
circuitry of the MAX19757 LO port can be left ON while
disabling the selected Rx path(s). Toggling the STBY
pin high (VCC) will place the selected LO port driver in
a constant ON state, ensuring a buffered termination for
the external synthesizer during main and/or diversity path
shutdowns. Depending on the application, this buffered
interface may allow for the elimination of the external
buffer that is typically used between the synthesizer and
themixersLOport.TheSTBYinputhasaninternal50kΩ
pulldown resistor which can be used to set a logic-low if
left unconnected.
LO Tune
The MAX19757 employs a resonant LO driver scheme for
improved efficiency, as well as an internal leveling control
loop (ALC) to hold the internal LO drive level constant. To
extend the frequency range of this topology, two bits of
tuning are used to adjust the LO tank resonance. Good
efficiency is maintained over a typical ±150MHz range
around the resonant frequency. Table 2 settings should be
used to select the appropriate LO band for best efficiency
and performance. DC currents over LO Frequency at the
four tune settings can be seen in the Typical Operating
Characteristics curves. The minimum bias current cor-
responds to the LO tank resonant point. The internal ALC
loop maintains a constant drive amplitude over the range
shown in the curves for different settings. The various
specifications and guarantees assume that the appropri-
ate LO band is used. The ALC loop includes a bias limit
circuit to prevent overdrive when operated at an inappro-
priate LO frequency. LO_TUNE1 and LO_TUNE2 can be
driven dynamically by using external control logic or can
besettoVccorgroundbyusinga0Ωresistoronthepins.
If driven from external logic, VCC must be applied to the
device so as to not overcurrent the on-chip ESD diodes
which could damage the part. The LO_TUNE1 and LO_
TUNE2 inputs have an internal 50kΩ pulldown resistor
which can be used to set a logic-low if left unconnected.
Table 1. Channel Enable/Disable States
Table 2. LO TUNE States
Main
Channel
Diversity
Channel PD1 PD2
ON ON 0 0
OFF OFF 1 0
ON OFF 0 1
OFF ON 1 1
Desired LO Band LO_TUNE1 LO_TUNE2
< 2000MHz 0 1
> 2000MHz to < 2200MHz 0 0
> 2200MHz to 2400MHz 1 1
> 2400MHz 1 0
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
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Bias Settings
Since mixer linearity and power are affected by the
device’s operating points, flexibility was built into the
MAX19757 so that the IF and LO bias levels can be
adjusted using external resistor sets (see the Typical
Application Circuit). Customized tradeoffs can thus be
made to optimize linearity vs. overall power consumption.
The IF quiescent bias is set via the current at pin 35 (the
R1 value to ground), and the internal LO drive amplitude
by the current at pin 29.
IF Amplier Bias Adjustments
Pin 35 of the device, IF_RADJ, must have a resistor to
ground for the IF amp to function. A nominal IF bias of
80mAisobtainedwitha4.87kΩresistorusedforR1.A
smaller resistance increases the IF bias. Conversely, a
larger resistance decreases the IF quiescent bias; the IF
amp bias current through L1/L2 or L4/L5 of the Typical
Application Circuit should not exceed 130mA.
LO Buffer Bias Adjustments
The internal LO target amplitude can be altered by sinking
or sourcing sink current at the LO_VADJ pin. To increase
the static LO drive, remove R3 from VCC and connect it
toground.ThevalueofR3shouldbegreaterthan10KΩ
for this increased drive operation. To reduce overall power
consumption by decreasing the LO drive, connect R3
from pin 29 to VCC. The Typical Application Circuit is con-
figured for this reduced power consumption mode.
Static Bias Operation
As outlined above, external resistor sets can be chosen
to set the bias schemes for the MAX19757’s LO and IF
amplifier circuits. Select R1 and R3 to set the IF and LO
biases per the guidance provided above. See the Typical
Application Circuit for details surrounding the suggested
configurations.
Using the static bias mode will ensure that the mixer deliv-
ers a constant level of linearity performance with a con-
stant level of power dissipation, regardless of the signal
power present on the mixer’s RF ports.
Dynamic Bias Operation
The static biasing schemes outlined above provide a con-
stant level of linearity for a given current draw. However,
in many base station receiver applications, it may not be
necessary to maintain exceptionally high levels of linearity
performance at all times. IIP3 linearity is critical for base
station receivers when the radio is operating in the pres-
ence of interfering blockers. Due to the intermittent nature
of these blocking signals, there exists an opportunity to
relax the mixer’s IIP3 performance when the blockers are
not present. This relaxation of linearity implies that the
mixer’s overall current consumption can be throttled back
by a commensurate amount.
The MAX19757 capitalizes on this opportunity by employ-
ing a novel dynamic biasing scheme which detects the
presence of blockers in the IF domain, and increases
the biases to the IF and LO amplifiers automatically. The
use of the feature is completely optional (see Optional
Dynamic Bias Typical Application Circuit). In this figure, a
few additional components and connections are added or
modified to enable this feature. Omitting these additional
components will force the circuit to revert back to the
static biasing scheme.
The MAX19757 includes a simple log amp detector that
senses the presence of a high-level signal on both of the
IF paths. IF_DET_OUT (pin 11) will yield a signal that
swings above or below the internal 1.2V bandgap refer-
ence and can therefore be used to source or sink current
into the IF and/or LO bias adjust pins. As the IF signal
increases, the IF_DET_OUT output decreases down to
its 0.4V limit. Conversely, as the IF signal decreases, the
IF_DET_OUT output increases to its upper limit of 1.7V.
The nominal bias crossing corresponds to an IF output
level of approximately +10dBm.
The IF_DET CEXT pin (17) is used to set the attack /
decay times of the detector. The effective resistance at
thispinis~30KΩ.SelectaCextvalueappropriateforthe
slowest system data rate.
Typical values for dynamic control of both the IF and
LO are as follows: R1 = 4.64K, R2 = 5K, R3 = 10K,
and Cext = 1µF. Under small-signal conditions, the chip
power will decrease ~25% and increase to about +30%
with an IIP3 increase of ~3dBm.
Note that the attack/decay times will be affected when
the individual paths are subjected to the shutdown states
described in Table 1. Contact the factory for details.
Layout Considerations
A properly designed PCB is an essential part of any RF/
microwave circuit. Keep RF signal lines as short as pos-
sible to reduce losses, radiation, and inductance. For best
performance, route the ground-pin traces directly to the
exposed pad underneath the package. This pad MUST
be connected to the ground plane of the board by using
multiple vias under the device to provide the best RF and
thermal conduction path. Solder the exposed pad on the
bottom of the device package to a PCB.
Power-Supply Bypassing
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
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│
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Proper voltage-supply bypassing is essential for high fre-
quency circuit stability. Bypass each VCC pin with capaci-
tors placed as close as possible to the device. Place the
smallest capacitor closest to the device. See the Typical
Application Circuit and Table 3 for details.
Exposed Pad RF and Thermal
Considerations
The exposed pad (EP) of the device’s 36-pin thin QFN
package provides a low thermal-resistance path to the
die. It is important that the PCB on which the IC is
mounted be designed to conduct heat from this contact.
In addition, provide the EP with a low-inductance RF
ground path for the device. The EP MUST be soldered to
a ground plane on the PCB, either directly or through an
array of plated via holes. Soldering the pad to ground is
also critical for efficient heat transfer. Use a solid ground
plane wherever possible.
Table 3. Typical Application Circuit
Component Values
DESIGNATION QTY DESCRIPTION
C1, C6 2
3.0pF ±0.1pF 50V C0G CER
CAP (0402)
Murata:GRM1555C1H3R0B
C12, C14 2
5.0pF ±0.1pF 50V C0G CER
CAP (0402)
Murata:GRM1555C1H5R0B
C2, C3, C5,
C7–C11,C13,
C16–C20
14
0.01µF ±10% 25V X7R CER
CAP (0402)
Murata:GRM155R71E103K
C25 1
4.7µF ±10% 16V X7R CER CAP
(1206)
Murata:GRM31CR71C475K
L1, L2, L4, L5 4
330 nH ±5% Wire Wound IND
(0805)
Coilcraft:0805CS-331XJLC
R1 1 4.87KΩ±1% Resistor (0402)
Any
R3 1 154KΩ±1% Resistor (0402)
Any
T1, T2 2Mini Circuits TC4-1W-17
U1 1 Maxim MAX19757ETX+
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
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Typical Application Circuit
MAX19757 EXPOSED PAD
+9876543
2
1
19202122232425
26
27
RFMAIN
RFDIV LO1
LO2
GND
GND
VCC
PD1
PD2
STBY
LOSEL
LO_TUNE1
LO_TUNE2
PD1
VCC
DNC
DNC
IF_DET_OUT
IF_DET_CEXT
IFD+
GND
GND2 GND1
IFD-
LO_TUNE1LO_TUNE2
LO_VADJ
RFM_RTN
RFD_RTN
VCC
GND
N.C.
GND
C1 C6
C2 C3
VCC
18
17
16
15
14
13
12
11
10
28
29
30
31
32
33
34
35
36
GND
C5
C12C14
C7
VCC
IFM+
IFM-
VCC
VCC
C11
VCC
VCC
50Ω
C16
C19
L1
T1
C20
L2
C18
Z = 4:1
PD2
STBY
LO2
IF MAIN
OUTPUT
RF MAIN
INPUT
RF DIV
INPUT
LO1
LOSEL
VCC
IF_RADJ
R1
R3
C17
VCC
VCC
C25
4.7µF
5V OR
3.3V
GND
VCC
C13
VCC
50Ω
C10
L4
T2
C9
L5
C8
Z = 4:1
IF DIV
OUTPUT
VCC
GND
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
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Optional Dynamic Bias Typical Application Circuit
MAX19757 EXPOSED PAD
+9876543
2
1
19202122232425
26
27
RFMAIN
RFDIV LO1
LO2
GND
GND
VCC
PD1
PD2
STBY
LOSEL
LO_TUNE1
LO_TUNE2
PD1
VCC
IF_DET_OUT
IF_DET_CEXT
IFD+
GND
GND2 GND1
IFD-
LO_TUNE1LO_TUNE2
LO_VADJ
RFM_RTN
RFD_RTN
VCC
GND
N.C.
GND
C1 C6
C2 C3
VCC
18
17
16
15
14
13
12
11
10
28
29
30
31
32
33
34
35
36
GND
C5
C12C14
C7
VCC
IFM+
IFM-
VCC
VCC
C11
VCC
50Ω
C19
L1
T1
C20
L2
C18
Z = 4:1
PD2
STBY
LO2
IF MAIN
OUTPUT
RF MAIN
INPUT
RF DIV
INPUT
LO1
LOSEL
VCC
IF_RADJ
R1
R2
R3
C17
VCC
VCC
C25
4.7µF
5V OR
3.3V
GND
VCC
C13
VCC
50Ω
C10
L4
T2
CEXT
C9
L5
C8
Z = 4:1
IF DIV
OUTPUT
VCC
VCC
C16
GND
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
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│
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Package Information
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.com/packages. Note
that a “+”, “#”, or “-” in the package code indicates RoHS status
only. Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
Chip Information
PROCESS:SiGeBiCMOS
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
T = Tape and reel.
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX19757ETX+ -40°C to +105°C 36 TQFN-EP*
MAX19757ETX+T -40°C to +105°C 36 TQFN-EP*
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
36 TQFN T3666+2 21-0141 90-0049
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
MAX19757 Dual, SiGe, High-Linearity,
1700MHz to 2700MHz Downconversion Mixer with
Advanced Shutdown Features
© 2012 Maxim Integrated Products, Inc.
│
34
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 12/12 Initial release —
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MAX19757ETX+