General Description
The MAX2058 high-linearity digital-variable-gain ampli-
fier (DVGA) is designed to provide 62dB of total gain
range and typical output IP3 and output P1dB levels of
+32.3dBm and +19dBm, respectively. The device is
ideal for a variety of applications, including RFID hand-
held and portal readers, as well as single and multicar-
rier 700MHz to 1200MHz GSM/EDGE, cdma2000®,
WCDMA, and iDEN®base stations. The MAX2058
yields a high level of component integration, which
includes two 5-bit, 31dB digital attenuators, a two-stage
driver amplifier, a loopback mixer, and a serial interface
to control the attenuators.
The MAX2058 is pin compatible with the MAX2059
1800MHz to 2200MHz DVGA, facilitating an easy
design-in for applications where a common PC board
layout is used for both frequency bands.
The MAX2058 is available in a 40-pin thin QFN pack-
age with an exposed paddle. Electrical performance is
guaranteed over a -40°C to +85°C temperature range.
Applications
GSM 850/GSM 900 2G and 2.5G EDGE Base-
Station Transmitters and Power Amplifiers
Cellular cdmaOne™, cdma2000, and Integrated
Digital Enhanced Network (iDEN) Base-Station
Transmitters and Power Amplifiers
WCDMA 850MHz and Other 3G Base-Station
Transmitters and Power Amplifiers
Transmitter Gain Control
Receiver Gain Control
Broadband Systems
Automatic Test Equipment
Digital and Spread-Spectrum Communication
Systems
Microwave Terrestrial Links
RFID Handheld and Portal Readers
Features
♦+32.3dBm Typical Output IP3
♦+19dBm Typical Output 1dB Compression Point
♦700MHz to 1200MHz RF Frequency Range
♦1800MHz to 2200MHz RF Frequency Range
(MAX2059)
♦10.5dB Typical Small-Signal Gain
♦Includes Two Independent 31dB Attenuator
Stages, Yielding 62dB of Total Gain-Control
Range with 1dB Steps
♦3-Wire SPI™/MICROWIRE™-Compatible
♦Integrated Loopback Mixer for Tx/Rx Self-
Diagnostics
♦+5V Single-Supply Operation
♦External Current-Setting Resistors for Scalable
Device Power
♦Lead-Free Package Available
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
19-0512; Rev 0; 6/06
**
EP = Exposed paddle.
+
Denotes lead-free package.
T
= Tape-and-reel.
Pin Configuration/Functional Diagram appears at end of data
sheet.
SPI is a trademark of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
cdma2000 is a registered trademark of Telecommunications
Industry Association.
iDEN is a registered trademark of Motorola, Inc.
cdmaOne is a trademark of CDMA Development Group.
PART TEMP RANGE PIN-PACKAGE PKG
CODE
MAX2058ETL -40°C to +85°C 40 Thi n Q FN - E P **
(6mm x 6mm) T4066-3
MAX2058ETL-T -40°C to +85°C 40 Thi n Q FN - E P **
( 6m m x 6m m ) T4066-3
MAX2058ETL+ -40°C to +85°C 40 Thi n Q FN - E P **
( 6m m x 6m m ) T4066-3
MAX2058ETL+T -40°C to +85°C 40 Thi n Q FN - E P **
( 6m m x 6m m ) T4066-3
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(MAX2058
Typical Application Circuit
, VCC = +4.75V to +5.25V, R1 = 1.2kΩ, R2 = 3.92kΩ, R3 = 2kΩ, TC= -40°C to +85°C. Typical
values are at VCC = +5.0V and TC= +25°C, unless otherwise noted.) (Note 1)
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.
VCC to GND ...........................................................-0.3V to +5.5V
RSET1, RSET2......................................................+1.2V to +4.0V
LBBIAS .......................................................(VCC - 1.5V) to +5.5V
LB_EN, DATA, CS, CLK .............................-0.3V to (VCC + 0.3V)
ATTEN_INA, ATTEN_INB, ATTEN_OUTA, ATTEN_OUTB
Input Power .................................................................+24dBm
AMPIN, Differential LO Input Power ...............................+12dBm
Continuous Power Dissipation (TA= +70°C)
40-Pin TQFN (derated 26.3mW/°C above +70°C) ......2100mW
Operating Temperature Range (Note A) .............-40°C to +85°C
Junction Temperature......................................................+150°C
θJC....................................................................................10°C/W
θJA....................................................................................38°C/W
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage VCC Reference to VCC, VCCLB, VCCLOGIC,
VCCBIAS1, VCCBIAS2, VCCAMP 4.75 5.0 5.25 V
LB mixer disabled (LB_EN = 1) 134 156
Total Supply Current ICC LB mixer enabled (LB_EN = 0) 158 186 mA
LOGIC INPUTS (DATA, CS, CLK, LB_EN)
Input High Voltage VIH 2.4 V
Input Low Voltage VIL 0.8 V
Input Current with Logic-High IIH 0.01 µA
Input Current with Logic-Low IIL 0.01 µA
AC ELECTRICAL CHARACTERISTICS
(MAX2058
Typical Application Circuit
, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤fRF ≤1200MHz,
40MHz ≤fLO ≤100MHz, TC= -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, PLO = -6dBm, fLO =
45MHz, fLBOUT = fRF - fLO, and TC= +25°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX2058 700 1200
RF Frequency (Note 2) MAX2059 1800 2200 MHz
Small-Signal Gain AVfRF = 940MHz, TC = +25°C 8.4 10.5 12.8 dB
TC = -40°C to +25°C -0.014
Gain Variation vs. Temperature All attenuation
settings TC = +25°C to +85°C -0.021 dB/°C
Output Power POUT PIN = 0dBm, fRF = 940MHz, TC = +25°C 8.4 10.5 12.8 dBm
800MHz to 900MHz 0.13
Output Power Flatness PIN = 0dBm 900MHz to 1000MHz -0.52 dB
Attenuation Range 62 dB
Output Third-Order Intercept
Point OIP3 Two tones: fRF1 = 940MHz, fRF2 = 941MHz,
POUT1 = POUT2 = +5dBm 32.3 dBm
Note A: TCis the temperature on the exposed paddle of the package.
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2058
Typical Application Circuit
, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤fRF ≤1200MHz,
40MHz ≤fLO ≤100MHz, TC= -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, PLO = -6dBm, fLO =
45MHz, fLBOUT = fRF - fLO, and TC= +25°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output -1dB Compression Point
(Note 3) OP1dB 19 dBm
RMS Error Vector Magnitude EVM POUT = +12dBm, EDGE modulation 0.5 %
200kHz offset -39.2
400kHz offset -73.5
600kHz offset -82.7
Spurious Emissions in 30kHz
Bandwidth (Note 4)
POUT = +12dBm,
EDGE modulation
1.2MHz offset -85.7
dBc
Noise Figure NF 6.8 dB
Input Return Loss 50Ω source, minimum attenuation setting 18 dB
Output Return Loss 50Ω load, minimum attenuation setting 20 dB
5-BIT DIGITAL ATTENUATORS
Insertion Loss Attenuator measured separately ZS = ZL =
50Ω3.3 dB
Input Third-Order Intercept Point IIP3
Attenuator measured separately ZS = ZL =
50Ω, two tones: fRF1 = 940MHz, fRF2 =
941MHz, PIN1 = PIN2 = +5dBm
44 dBm
Control Range 31 dB
800MHz to 900MHz ±0.08
Attenuation Step Size Variation
vs. Frequency 900MHz to 1000MHz ±0.06 dB
800MHz to 1000MHz,
TC = -40°C to +25°C ±0.002
Attenuation Variation vs.
Temperature 800MHz to 1000MHz,
TC = +25°C to +85°C ±0.003
dB/°C
Step Size 1dB
Relative Step Accuracy 800MHz to 1000MHz -0.2
+0.4 dB
Absolute Step Accuracy 800MHz to 1000MHz -0.2
+0.5 dB
Spurious Emissions in 300kHz
Bandwidth (Note 5)
No RF input, attenuator A stepped from 0 to
2dB, 7dB to 9dB, 15dB to 17dB, 0 to 31dB,
31dB to 0dB, with attenuator B at 0dB;
attenuator B stepped from 0 to 2dB, 7dB to
9dB, 15dB to 17dB, 0 to 31dB, 31dB to
0dB, with attenuator A at 0dB
-85 dBm
Switching Speed
From chip select transitioning high to the
output settling to within 1dB of steady state
output
0.3 µs
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
4 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2058
Typical Application Circuit
, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤fRF ≤1200MHz,
40MHz ≤fLO ≤100MHz, TC= -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, PLO = -6dBm, fLO =
45MHz, fLBOUT = fRF - fLO, and TC= +25°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
LOOPBACK MIXER
LO Frequency (Note 2) fLO 40 100 MHz
LO Input Power PLO -6 0 dBm
Output Power (Note 6) PIN = +5dBm, fRF = 940MHz, TC = +25°C -14.7 -12.7 -10.8 dBm
800MHz to 900MHz ±1.7
Gain Accuracy PIN = +5dBm, TC
= -40°C to +25°C 900MHz to 1000MHz ±1.7 dB
Output Third-Order Intercept
Point (Note 6) OIP3 Tw o tones: fR F1
= 940M H z, fR F2
= 940.2M H z,
P
IN 1
= P
IN 2
= + 2d Bm , TC
= + 25°C 10.6 dBm
Output Noise Floor PIN = +5dBm -137 dBc/Hz
LB_EN enable time 0.12
ON/OFF Switching Time LB_EN disable time 0.12 µs
LBOUT to ATTEN_OUTB Isolation Mixer enabled, attenuators A and B both set
to 31dB, PIN = +5dBm 67 dB
ATTEN_OUTB to LBOUT Isolation Mixer disabled, PIN = 0dBm 50 dB
Mixer enabled, 50Ω load 22
Output Return Loss Mixer disabled, 50Ω load 23 dB
LO Port Return Loss 50Ω source 32 dB
SERIAL PERIPHERAL INTERFACE (SPI)
Maximum Clock Speed 38 MHz
Data to Clock Setup Time tCS 1ns
Data to Clock Hold Time tCH 9ns
Clock to CS Setup Time tES 4ns
CS Positive Pulse Width tEW 18 ns
CS Negative Pulse Width tEWN 24 ns
CLOCK Pulse Width tCW 13 ns
Note 1: All limits include external component losses. Output measurements taken at RFOUT or LBOUT ports of the
Typical
Application Circuit
.
Note 2: Operating outside this range is possible, but with degraded performance of some parameters.
Note 3: Compression point characterized. It is advisable not to continuously operate the VGA RF input above +15dBm.
Note 4: Input RF source contribution to spurious emissions (Agilent ESG 4435B, PSA E4443A): 200kHz = -39.2dBc,
400kHz = -73.5dBc, 600kHz = -83.2dBc, 1.2MHz = -85.7dBc
Note 5: No SPI clock input applied.
Note 6: Guaranteed by design and characterization.
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
_______________________________________________________________________________________
5
GAIN vs. RF FREQUENCY
(MAXIMUM GAIN)
RF FREQUENCY (MHz)
GAIN (dB)
MAX2058 toc01
700 800 900 1000 1100 1200
6
7
8
9
10
11
12
13
TC = +25°C
TC = +5°C
TC = +85°C
TC = -40°C
GAIN vs. RF FREQUENCY
(MAXIMUM GAIN)
RF FREQUENCY (MHz)
GAIN (dB)
MAX2058 toc02
6
8
7
10
9
12
11
13
700 900800 1000 1100 1200
VCC = 4.75V
VCC = 5.0V
VCC = 5.25V
GAIN vs. RF FREQUENCY
ADJUSTING ATTEN A
RF FREQUENCY (MHz)
GAIN (dB)
MAX2058 toc03
700 800 900 1000 1100 1200
-25
-15
-5
5
15
ATTEN A ABS ACCURACY vs. RF FREQUENCY
RF FREQUENCY (MHz)
ERROR (dB)
MAX2058 toc04
700 800 900 1000 1100 1200
-1.0
-0.5
0
0.5
1.0
ATTEN A REL ACCURACY vs. RF FREQUENCY
RF FREQUENCY (MHz)
ERROR (dB)
MAX2058 toc05
700 800 900 1000 1100 1200
-1.0
-0.5
0
0.5
1.0
GAIN vs. RF FREQUENCY
ADJUSTING ATTEN B
RF FREQUENCY (MHz)
GAIN (dB)
MAX2058 toc06
700 800 900 1000 1100 1200
-25
-15
-5
5
15
ATTEN B ABS ACCURACY vs. RF FREQUENCY
RF FREQUENCY (MHz)
ERROR (dB)
MAX2058 toc07
700 800 900 1000 1100 1200
-1.0
-0.5
0
0.5
1.0
ATTEN B REL ACCURACY vs. RF FREQUENCY
RF FREQUENCY (MHz)
ERROR (dB)
MAX2058 toc08
700 800 900 1000 1100 1200
-1.0
-0.5
0
0.5
1.0
OUTPUT IP3 vs. RF FREQUENCY
RF FREQUENCY (MHz)
OUTPUT IP3 (dBm)
MAX2058 toc09
800 850 900 950 1000
29
30
31
32
33
34
TC = +85°C
TC = +5°C
TC = +25°C
TC = -40°C
Typical Operating Characteristics
(MAX2058
Typical Application Circuit
, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤fRF ≤1200MHz,
40MHz ≤fLO ≤100MHz, TC= -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT =
fRF - fLO, and TC= +25°C, unless otherwise noted.)
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
6 _______________________________________________________________________________________
OUTPUT IP3 vs. RF FREQUENCY
RF FREQUENCY (MHz)
OUTPUT IP3 (dBm)
MAX2058 toc10
800 850 900 950 1000
29
30
31
32
33
34
VCC = 5.0V VCC = 4.75V
VCC = 5.25V
NOISE FIGURE vs. RF FREQUENCY
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
MAX2058 toc11
700 800 900 1000 1100 1200
4
5
6
7
8
9
10
TC = +85°C
TC = +5°C
TC = +25°C
TC = -40°C
NOISE FIGURE vs. RF FREQUENCY
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
MAX2058 toc12
700 800 900 1000 1100 1200
4
5
6
7
8
9
10
VCC = 4.75V
VCC = 5.0V
VCC = 5.25V
OUTPUT P1dB vs. RF FREQUENCY
RF FREQUENCY (MHz)
OUTPUT P1dB (dBm)
MAX2058 toc13
700 800 900 1000 1100 1200
14
15
16
17
18
19
20
21
22
TC = +85°C
TC = +25°C
TC = +5°C
TC = -40°C
OUTPUT P1dB vs. RF FREQUENCY
RF FREQUENCY (MHz)
OUTPUT P1dB (dBm)
MAX2058 toc14
700 800 900 1000 1100 1200
14
15
16
17
18
19
20
21
22
VCC = 4.75V
VCC = 5.0V
VCC = 5.25V
INPUT RETURN LOSS vs. RF FREQUENCY
ATTEN A VARIED
RF FREQUENCY (MHz)
INPUT RETURN LOSS (dB)
MAX2058 toc15
700 800 900 1000 1100 1200
0
5
10
15
20
25
30
8dB
0dB
2dB 4dB
1dB
16dB, 31dB
INPUT RETURN LOSS vs. RF FREQUENCY
ATTEN B VARIED
RF FREQUENCY (MHz)
INPUT RETURN LOSS (dB)
MAX2058 toc16
700 800 900 1000 1100 1200
0
5
10
15
20
25
30
31dB
0dB, 1dB
OUTPUT RETURN LOSS vs. RF FREQUENCY
ATTEN A VARIED
RF FREQUENCY (MHz)
OUTPUT RETURN LOSS (dB)
MAX2058 toc17
700 800 900 1000 1100 1200
0
10
20
30
40
0dB
31dB
OUTPUT RETURN LOSS vs. RF FREQUENCY
ATTEN B VARIED
RF FREQUENCY (MHz)
OUTPUT RETURN LOSS (dB)
MAX2058 toc18
700 800 900 1000 1100 1200
0
10
20
30
40 1dB
0dB
8dB
16dB, 31dB
4dB
2dB
Typical Operating Characteristics (continued)
(MAX2058
Typical Application Circuit
, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤fRF ≤1200MHz,
40MHz ≤fLO ≤100MHz, TC= -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT =
fRF - fLO, and TC= +25°C, unless otherwise noted.)
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
_______________________________________________________________________________________
7
REVERSE GAIN vs. RF FREQUENCY
ADJUSTING ATTEN A AND B
RF FREQUENCY (MHz)
GAIN (dB)
MAX2058 toc19
700 800 900 1000 1100 1200
-80
-70
-60
-50
-40
-30
ATTEN A AND B, 0dB
ATTEN A, 31dB
ATTEN B, 31dB
MIXER CONV LOSS vs. RF FREQUENCY
RF FREQUENCY (MHz)
CONVERSION LOSS (dB)
MAX2058 toc20
800 850 900 950 1000
14
15
16
17
18
19
20
TC = +5°CTC = -40°C
TC = +85°CTC = +25°C
MIXER CONV LOSS vs. RF FREQUENCY
RF FREQUENCY (MHz)
CONVERSION LOSS (dB)
MAX2058 toc21
800 850 900 950 1000
14
15
16
17
18
19
20
VCC = 5.0V
VCC = 4.75V
VCC = 5.25V
MIXER CONV LOSS vs. RF FREQUENCY
RF FREQUENCY (MHz)
CONVERSION LOSS (dB)
MAX2058 toc22
800 850 900 950 1000
14
15
16
17
18
19
20
PLO = 0dBm
PLO = -3dBm
PLO = -6dBm
MIXER OUTPUT IP3 vs. RF FREQUENCY
RF FREQUENCY (MHz)
OUTPUT IP3 (dBm)
MAX2058 toc23
800 850 900 950 1000
7
8
9
10
11
12
13
TC = +85°C
TC = +5°C
TC = +25°C
TC = -40°C
MIXER OUTPUT IP3 vs. RF FREQUENCY
RF FREQUENCY (MHz)
OUTPUT IP3 (dBm)
MAX2058 toc24
800 850 900 950 1000
7
8
9
10
11
12
13
VCC = 4.75V VCC = 5.0V
VCC = 5.25V
MIXER OUTPUT IP3 vs. RF FREQUENCY
RF FREQUENCY (MHz)
OUTPUT IP3 (dBm)
MAX2058 toc25
800 850 900 950 1000
7
8
9
10
11
12
13
PLO = -6dBm PLO = 0dBm
PLO = -3dBm, 0dBm
MIXER OUTPUT RETURN LOSS
vs. RF FREQUENCY (MIXER ENABLED)
RF FREQUENCY (MHz)
MIXER OUT RETURN LOSS (dB)
MAX2058 toc26
700 800 900 1000 1100 1200
0
10
20
30
40
TC = +85°C
TC = +25°C
TC = +5°CTC = -40°C
MIXER OUTPUT RETURN LOSS
vs. RF FREQUENCY (MIXER ENABLED)
RF FREQUENCY (MHz)
MIXER OUT RETURN LOSS (dB)
MAX2058 toc27
700 800 900 1000 1100 1200
0
10
20
30
40
VCC = 4.75V, 5.0V, 5.25V
Typical Operating Characteristics (continued)
(MAX2058
Typical Application Circuit
, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤fRF ≤1200MHz,
40MHz ≤fLO ≤100MHz, TC= -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT =
fRF - fLO, and TC= +25°C, unless otherwise noted.)
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
8 _______________________________________________________________________________________
MIXER OUTPUT RETURN LOSS
vs. RF FREQUENCY (MIXER DISABLED)
RF FREQUENCY (MHz)
MIXER OUT RETURN LOSS (dB)
MAX2058 toc28
700 800 900 1000 1100 1200
0
10
20
30
40
TC = +85°CTC = +25°C
TC = +5°CTC = -40°C
MIXER OUTPUT RETURN LOSS
vs. RF FREQUENCY (MIXER DISABLED)
RF FREQUENCY (MHz)
MIXER OUT RETURN LOSS (dB)
MAX2058 toc29
700 800 900 1000 1100 1200
0
10
20
30
40
VCC = 4.75V, 5.0V, 5.25V
LO RETURN LOSS vs. LO FREQUENCY
(MIXER ENABLED)
LO FREQUENCY (MHz)
LO RETURN LOSS (dB)
MAX2058 toc30
0 50 100 150 200
0
10
20
30
40
TC = -40°C
TC = +5°C
TC = +25°C
TC = +85°C
LO RETURN LOSS vs. LO FREQUENCY
(MIXER ENABLED)
LO FREQUENCY (MHz)
LO RETURN LOSS (dB)
MAX2058 toc31
15010050
30
20
10
0
40
0 200
VCC = 4.75V, 5.0V, 5.25V
ATTEN A ONLY
GAIN vs. RF FREQUENCY
MAX2058 toc32
RF FREQUENCY (MHz)
GAIN (dB)
1000 1100900800
-30
-20
-10
0
-40
700 1200
ATTEN A ONLY
GAIN vs. RF FREQUENCY
(NMT 450MHz BAND)
MAX2058 toc33
RF FREQUENCY (MHz)
GAIN (dB)
500 550350 400 450
-30
-20
-10
0
-40
300
ATTEN A ONLY
ABS ACCURACY vs. RF FREQUENCY
MAX2058 toc34
RF FREQUENCY (MHz)
ERROR (dB)
11001000900800700
-1.0
-1.5
-0.5
0
1.0
0.5
1.5
2.0
-2.0
1200
ATTEN A ONLY
ABS ACCURACY vs. RF FREQUENCY
(NMT 450MHz BAND)
MAX2058 toc35
RF FREQUENCY (MHz)
ERROR (dB)
550500450400350
-1.0
-0.5
0
0.5
1.0
1.5
2.0
-2.0
-1.5
300
ATTEN A ONLY
REL ACCURACY vs. RF FREQUENCY
MAX2058 toc36
RF FREQUENCY (MHz)
ERROR (dB)
1000900700 800
-0.5
0
0.5
1.0
-1.0
12001100
Typical Operating Characteristics (continued)
(MAX2058
Typical Application Circuit
, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤fRF ≤1200MHz,
40MHz ≤fLO ≤100MHz, TC= -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT =
fRF - fLO, and TC= +25°C, unless otherwise noted.)
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
_______________________________________________________________________________________ 9
ATTEN A ONLY
REL ACCURACY vs. RF FREQUENCY
(NMT 450MHz BAND)
MAX2058 toc37
RF FREQUENCY (MHz)
ERROR (dB)
500450400350300
-0.5
0
0.5
1.0
-1.0
550
ATTEN B ONLY
GAIN vs. RF FREQUENCY
MAX2058 toc38
RF FREQUENCY (MHz)
GAIN (dB)
1000 1100900800
-30
-20
-10
0
-40
700 1200
ATTEN B ONLY
GAIN vs. RF FREQUENCY
(NMT 450MHz BAND)
MAX2058 toc39
RF FREQUENCY (MHz)
GAIN (dB)
500 550350 400 450
-30
-20
-10
0
-40
300
ATTEN B ONLY
ABS ACCURACY vs. RF FREQUENCY
MAX2058 toc40
RF FREQUENCY (MHz)
ERROR (dB)
11001000900800700
-1.0
-1.5
-0.5
0
1.0
0.5
1.5
2.0
-2.0
1200
ATTEN B ONLY
ABS ACCURACY vs. RF FREQUENCY
(NMT 450MHz BAND)
MAX2058 toc41
RF FREQUENCY (MHz)
ERROR (dB)
550500450400350
-1.0
-0.5
0
0.5
1.0
1.5
2.0
-2.0
-1.5
300
Typical Operating Characteristics (continued)
(MAX2058
Typical Application Circuit
, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤fRF ≤1200MHz,
40MHz ≤fLO ≤100MHz, TC= -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT =
fRF - fLO, and TC= +25°C, unless otherwise noted.)
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
10 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(MAX2058
Typical Application Circuit
, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤fRF ≤1200MHz,
40MHz ≤fLO ≤100MHz, TC= -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT =
fRF - fLO, and TC= +25°C, unless otherwise noted.)
ATTEN B ONLY
REL ACCURACY vs. RF FREQUENCY
MAX2058 toc42
RF FREQUENCY (MHz)
ERROR (dB)
1000900700 800
-0.5
0
0.5
1.0
-1.0
12001100
ATTEN B ONLY
REL ACCURACY vs. RF FREQUENCY
(NMT 450MHz BAND)
MAX2058 toc43
RF FREQUENCY (MHz)
ERROR (dB)
500450400350300
-0.5
0
0.5
1.0
-1.0
550
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(MIXER DISABLED)
VCC (V)
SUPPLY CURRENT (mA)
MAX2058 toc44
4.750 4.875 5.000 5.125 5.250
110
120
130
140
150
TC = +25°CTC = +5°CTC = -40°C
TC = +85°C
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(MIXER ENABLED)
VCC (V)
SUPPLY CURRENT (mA)
MAX2058 toc45
4.750 4.875 5.000 5.125 5.250
130
140
150
160
170
180
TC = +85°C
TC = +5°CTC = -40°C
TC = +25°C
MAX2058
Pin Description
PIN NAME FUNCTION
1 LO+ Loopback Mixer Local Oscillator Positive Input
2 LO- Loopback Mixer Local Oscillator Negative Input
3 VCCLB Loopback Mixer Supply Voltage. +5V supply for the internal loopback mixer. Bypass to GND with
100pF and 0.1µF capacitors as close as possible to the pin.
4 LBOUT Loopback Mixer RF Output. Internally matched to 50Ω. AC-couple with a capacitor.
5 LB_EN Loop b ack M i xer Log i c Inp ut. S et to l og i c- l ow 0 to enab l e the m i xer . S et to l og i c- hi g h 1 to d i sab l e the m i xer .
6 DATA SPI Digital Data Input
7 CLK SPI Clock Input
8CS SPI Chip-Select Input
9 VCCLOGIC Logic Supply Voltage. +5V supply for the internal logic circuitry. Bypass to GND with 100pF and
0.1µF capacitors as close as possible to the pin.
10, 11, 13,
14, 16, 17,
19, 22, 24,
25, 26, 30,
32, 34, 35,
37, 38
GND Ground
12 ATTEN_OUTB Attenuator B Output. Internally matched to 50Ω.
15 VCC Attenuator B Supply. +5V supply for attenuator B. Bypass to GND with 100pF and 0.01µF capacitors
as close as possible to the pin.
18 ATTEN_INB Attenuator B Input. Internally matched to 50Ω.
20 RSET2 Output Amplifier Bias-Current-Setting Resistor. Sets the bias current for the output amplifier stage.
Connect a 3.92kΩ resistor to ground.
21 VCCBIAS2 Bias Circuit Supply Voltage. +5V supply for the internal bias circuitry. Bypass to GND with 1000pF
and 0.1µF capacitors as close as possible to the pin.
23 AMPOUT RF Amplifier Output. Internally matched to 50Ω.
27 VCCAMP RF Amplifier Supply Voltage. +5V supply for the RF amplifier. Bypass to GND with 1000pF and 0.1µF
capacitors as close as possible to the pin.
28 AMPIN RF Amplifier Input. Internally matched to 50Ω.
29 VCCBIAS1 Bias Circuit Supply Voltage. +5V supply for the internal bias circuitry. Bypass to GND with 1000pF
and 0.1µF capacitors as close as possible to the pin.
31 RSET1 Input Amplifier Bias-Current-Setting Resistor. Sets the bias current for the input amplifier stage.
Connect a 1.2kΩ resistor to ground.
33 ATTEN_OUTA Attenuator A Output. Internally matched to 50Ω.
36 VCC Attenuator A Supply Voltage. +5V supply for attenuator A. Bypass to GND with 100pF and 0.01µF
capacitors as close as possible to the pin.
39 ATTEN_INA Attenuator A Input. Internally matched to 50Ω.
40 LBBIAS Loopback Mixer Bias-Current-Setting Resistor. Sets the bias current for the mixer. Connect a 2kΩ
resistor to ground.
EP GND Exposed Ground Paddle. Solder the exposed paddle to GND using multiple vias.
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
______________________________________________________________________________________ 11
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
12 ______________________________________________________________________________________
Detailed Description
The MAX2058 high-linearity DVGA consists of two 5-bit,
31dB digital attenuators, a fixed-gain two-stage driver
amplifier, a loopback mixer, and a serial interface to
control the attenuators. This high level of component
integration makes the MAX2058 ideal for base-station
transmitter applications. The MAX2058 is designed to
operate in the 700MHz to 1200MHz frequency ranges.
The overall cascaded performance of the MAX2058
produces a typical 10.5dB gain, a +32.3dBm OIP3, a
19dBm OP1dB, and a total 62dB gain-control range.
5-Bit Attenuators
The MAX2058 integrates two 5-bit digital attenuators to
achieve a high dynamic range. Each attenuator has a
31dB control range, a 1dB step size, and is pro-
grammed with the 3-wire SPI. See the
Applications
Information
section and Table 1 for attenuator program-
ming details. The attenuators can be used for both stat-
ic and dynamic power control.
Driver Amplifier
The MAX2058 includes a two-stage medium power
amplifier with a fixed 17.5dB gain. The driver amplifier
circuit is optimized for high linearity and medium output
power capability for the 800MHz to 1000MHz frequen-
cy range. The driver amplifier is intended to amplify a
modulated signal and drive a high-power amplifier in
base-station transmitters. In a typical application, the
driver amplifier is cascaded in between the two digital
attenuators. See the
Typical Application Circuit.
The two-stage amplifier stage can be disabled for
applications where only the digital attenuators and/or
loopback mixer are used. To disable the two-stage
amplifier, ground or leave unconnected the amplifier
supplies VCCBIAS2, VCCAMP, VCCBIAS1, and also
the inputs for setting the amplifier bias currents RSET1,
RSET2. This reduces the supply current by approxi-
mately 132mA under typical conditions.
Loopback Mixer
The MAX2058 loopback mixer uses a double-balanced
active architecture designed to operate with a 700MHz
to 1200MHz RF frequency range, and a 40MHz to
100MHz LO frequency range. The RF port of the mixer is
connected internally (with an on-chip switch) to the input
of the first attenuator stage. The mixer’s IF port is
matched for a single-ended 50Ωimpedance, while the
LO port requires a differential input impedance of 100Ω.
The loopback mixer facilitates a self-diagnostic mode
for cellular transceivers, whereby the Tx band signal at
the input of the mixer can be translated up or down to
the corresponding Rx band. This translated signal can
then be fed back to the radio’s receiver for complete
Tx/Rx loop diagnostics. The loopback mixer is enabled
and disabled with LB_EN. Set LB_EN to a logic-low 0 to
enable the mixer, set LB_EN to a logic-high 1 to disable
the mixer.
Applications Information
SPI Interface and Attenuator Settings
The two 5-bit attenuators are programmed with the 3-
wire SPI/MICROWIRE-compatible serial interface using
10-bit words. Bit 9 of the 10-bit data is shifted in first,
along with all remaining data bits, on the rising edge of
the clock regardless of CS being high or low. Once all
the data bits are shifted in, all will be sent to the attenua-
tors on the rising edge of CS, thus changing the attenua-
tion state. For standard SPI operation, pull CS low for the
duration of a valid 10-bit data set (tEWN). This CS nega-
tive pulse width includes the setup time of the rising
clock edge to CS transitioning high (tES). See Figure 1.
ATTENUATOR A (5 MSBs) ATTENUATOR B (5 LSBs)
Bit 9 = 16dB step Bit 4 = 16dB step
Bit 8 = 8dB step Bit 3 = 8dB step
Bit 7 = 4dB step Bit 2 = 4dB step
Bit 6 = 2dB step Bit 1 = 2dB step
Bit 5 = 1dB step Bit 0 = 1dB step
NOTES:
DATA ENTERED ON CLOCK RISING EDGE.
ATTENUATOR STATE CHANGE ON CS RISING EDGE.
MSBDATA
CLOCK
CS
BIT 9 BIT 8 BIT 1 BIT 0 LSB
tCS tCH tCW
tEWN tES
tEW
Table 1. Attenuator Programming
Figure 1. SPI Timing Diagram
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
______________________________________________________________________________________ 13
MAX2058/MAX2059*
90°
DUAL DAC QUAD AMP
ZERO-IF
MODS/DEMODS
RF DIGITAL VGAs
MAX9491*
VCO + PLL
I
12
Q
12
SPI
LOGIC
31dB
RF OUT
*FUTURE PRODUCTS—CONTACT FACTORY FOR SAMPLES
SPI
CONTROL
LOOPBACK
OUT
(FEEDS BACK
INTO Rx CHAIN
FRONT-END)
Rx
OFF
45, 80,
OR
95MHz
LO
17.5dB31dB
∑
0°
MAX5873 MAX4395
MAX2021/MAX2022/MAX2023*
Figure 2. Direct Conversion Transmitter for GSM/EDGE Basestations
The 5 MSBs of the 10-bit word program attenuator A,
and the 5 LSBs of the 10-bit word program attenuator
B. Each bit sets the attenuators to a corresponding
attenuation level. For example, logic-low 0 for bit 5 and
bit 0 of attenuator A and B, respectively, sets both
attenuators at 1dB. 00000 configures both attenuators
for 31dB attenuation and 11111 sets for 0dB attenua-
tion. See Table 1 for programming details.
External Bias
Bias currents for the two-stage amplifier and the loop-
back mixer are set and optimized with external resistors.
Resistor R1 (pin 31) sets the bias current for the input
amplifier, R2 (pin 20) sets the bias current for the output
amplifier, and R3 (pin 40) sets the bias for the loopback
mixer. The external biasing resistor values can be
increased for reduced current operation at the expense
of performance. Contact the factory for details.
Board Layout
The pin configuration of the MAX2058 has been opti-
mized to facilitate a very compact physical layout of the
device and its associated discrete components.
The exposed paddle (EP) of the MAX2058’s thin QFN-
EP package provides a low thermal-resistance path to
the die. It is important that the PC board on which the
MAX2058 is mounted be designed to conduct heat
from the EP. In addition, provide the EP with a low-
inductance path to electrical ground. The EP MUST be
soldered to a ground plane on the PC board, either
directly or through an array of plated via holes.
COMPONENT VALUE DESCRIPTION
C1, C4, C10, C13,
C16 0.1µF Microwave capacitors (0603)
C2, C5, C8, C17 100pF Microwave capacitors (0402)
C3, C6, C14, C19 47pF Microwave capacitors (0402)
C7, C18 0.01µF Microwave capacitors (0402)
C9, C12, C15 1000pF Microwave capacitors (0402)
C11 3.9pF Microwave capacitor (0402)
R1 1.2kΩ±1% resistor (0402)
R2 3.92kΩ±1% resistor (0402)
R3 2.0kΩ±1% resistor (0402)
R4 110Ω±1% resistor (0402)
T1 2:1 RF transformer (100:50)
Mini-Circuits TC2-1T
U1 — MAX2058 MAXIM IC
Table 2. Component List Referring to the
Typical Application Circuit
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
14 ______________________________________________________________________________________
MAX2058
30
29
28
27
26
36 35 34 33 32 31
R1
GND
GND
GND
GND
GND
AMPOUT
R2
C19
C17 C18
C1 C2
C3
VCC
VCC
VCC
C7
C8
RF INPUT
VCC
GND
GND
GND
GND
GND
RSET1
ATTEN_OUTB
ATTEN_INB
ATTN_INA
ATTEN_OUTA
LBBIAS
40 39 38 37
15 16 17 18 19 2011 12 13 14
25
23
21
24
22
5
4
3
2
9
8
10
7
6
1
R3
T1
R4 LO+
LO-
VCCLB
VCCLOGIC
DRIVER AMP
VCCBIAS2
LBOUT
LB_EN
DATA
CLK
CS
GND
GND
GND
RSET2
GND
GND
GND
GND
VCC
5-BIT ATTENUATOR
B
SPI
E.P.
5-BIT ATTENUATOR
A
LO INPUT
LBOUT
RF OUTPUT
C4 C5
C6
VCC
C10
C11
C14
C9
VCC
VCCAMP
AMPIN
VCCBIAS1
C13C12
VCC
C16C15
Typical Application Circuit
Direct-Conversion Base-Station
Transmitter
The MAX2058/MAX2059 are designed to interface
directly with Maxim’s direct-conversion quadrature
modulators and high-speed DACs to provide a com-
plete solution for GSM/EDGE base-station transmitter
applications. See Figure 2. The MAX2058/MAX2059,
together with the MAX2021/MAX2022/MAX2023* direct-
conversion modulators/demodulators, the MAX5873
dual-channel DAC, and the MAX4395 quad amplifier,
form an ideal total transmitter lineup. This overall sys-
tem is highly efficient and low cost, while maintaining
high linearity and low noise performance.
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________
15
© 2006 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
Package Information
For the latest package outline information, go to
www.maxim-ic.com/packages.
MAX2058
30
29
28
27
26
36 35 34 33 32 31
40 39 38 37
15 16 17 18 19 2011 12 13 14
25
23
21
24
22
5
4
3
2
9
8
10
7
6
1
DRIVER AMP
5-BIT ATTENUATOR
B
SPI
5-BIT ATTENUATOR
A
GND
GND
GND
GND
GND
AMPOUT
VCC
GND
GND
GND
GND
GND
RSET1
ATTEN_OUTB
ATTEN_INB
ATTEN_INA
ATTEN_OUTA
LBBIAS
LO+
LO-
VCCLB
VCCLOGIC
VCCBIAS2
LBOUT
LB_EN
DATA
CLK
CS
GND
GND
GND
RSET2
GND
GND
GND
GND
VCC
VCCAMP
AMPIN
VCCBIAS1
Pin Configuration/Functional Diagram
Chip Information
PROCESS: SiGe BiCMOS
