General Description
The MAX2657/MAX2658 high-gain, low-noise amplifiers
(LNAs) are designed for GPS L1, Galileo, and GLONASS
applications. Designed in Maxim's advanced SiGe pro-
cess, the devices achieve a high gain and an ultra-low-
noise figure while maximizing the input-referred 1dB
compression point and the 3rd-order intercept point.
The MAX2657/MAX2658 operate from a +1.6V to +3.3V
single supply. The MAX2657 is optimized for low current.
The MAX2658 is optimized for high linearity. The shut-
down feature in the device reduces the supply current to
be less than 1µA. The MAX2657/MAX2658 are available
in a very small, lead-free, RoHS-compliant, 0.86mm x
1.26mm x 0.65mm, wafer-level package (WLP).
Applications
●Location-Enabled Mobile Devices
●Telematics (Asset Tracking and Management)
●Personal Navigation Devices (PNDs)
●Cellular Phones with GPS
●Notebook PCs/Ultra-Mobile PCs
●Recreational, Marine Navigation
●Avionics
●Watches
Features
●High-Power Gain: 19dB (MAX2657)
●Ultra-Low-Noise Figure: 0.8dB
● Integrated 50Ω Output Matching Circuit
●Low Supply Current: 4.1mA (MAX2657)
●Wide Supply Voltage Range: 1.6V to 3.3V
●Low Bill of Materials: One Inductor, Two Capacitors
●Small Footprint: 0.86mm x 1.26mm
●Thin Profile: 0.65mm
●0.4mm-Pitch Wafer-Level Package (WLP)
19-4956; Rev 1; 4/14
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX2657EWT+T -40°C to +85°C 6 WLP
MAX2658EWT+T -40°C to +85°C 6 WLP
B2
RFIN
+
RFOUT
VCC
SHDN RF
OUTPUT
GND
RF
INPUT
L1 = 6.2nH (MAX2657)
C1 = 820pF (MAX2657)
C2 = 33nF
L1 = 2.7nH (MAX2658)
C1 = 1500pF (MAX2658)
L1
C1
C2
VCC
MAX2657
MAX2658
B1
A2
BIAS
A1
C2
GND C1
MAX2657/MAX2658 GPS/GNSS Low-Noise Amplifiers
Pin Conguration/Typical Application Circuit
EVALUATION KIT AVAILABLE
VCC to GND .........................................................-0.3V to +3.6V
Other Pins to GND ............... -0.3V to (+ Operating VCC + 0.3V)
Maximum RF Input Power ...............................................+5dBm
Continuous Power Dissipation (TA = +70°C)
6-Bump WLP (derates 10.5mW/°C above +70°C) ......840mW
Maximum Current into RF Input ......................................... 10mA
Operating Temperature Range ........................... -40°C to +85°C
Junction Temperature ...................................................... +150°C
Storage Temperature Range ............................ -65°C to +160°C
Lead Temperature (soldering, 10s) .........Reflow Profile (Note 1)
(MAX2657/MAX2658 EV kit. VCC = 1.6V to 3.3V, TA = -40°C to +85°C, fRFIN = 1575.42MHz. Typical values are at VCC = 2.85V and
TA = +25°C, unless otherwise noted.) (Note 2)
(MAX2657/MAX2658 EV kit. VCC = 1.6V to 3.3V, TA = -40°C to +85°C, no RF signals are applied. Typical values are at VCC = 2.85V
and TA = +25°C, unless otherwise noted.) (Note 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Voltage 1.6 2.85 3.3 V
Supply Current
SHDN = high MAX2657 4.1 mA
MAX2658 7.7
Shutdown mode, SHDN = low 1 µA
Digital Input Logic-High 1.2 V
Digital Input Logic-Low 0.45 V
Digital Input Current 1 µA
PARAMETER CONDITIONS MIN TYP MAX UNITS
RF Frequency L1 band 1575.42 MHz
Power Gain
VCC = 2.85V MAX2657 19.5
dB
MAX2658 17.7
VCC = 1.6V MAX2657 19.4
MAX2658 17.6
Noise Figure VCC = 1.8V 0.8 dB
VCC = 3.3V 0.8
In-Band 3rd-Order Input Intercept
Point (Note 3) MAX2657 -3.5 dBm
MAX2658 +4.5
Out-of-Band 3rd-Order Input
Intercept Point (Note 4) MAX2657 +2.5 dBm
MAX2658 +8
MAX2657/MAX2658 GPS/GNSS Low-Noise Ampliers
www.maximintegrated.com Maxim Integrated
│
2
AC Electrical Characteristics
DC Electrical Characteristics
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.
CAUTION! ESD SENSITIVE DEVICE
Note 1: Refer to Application Note 1891: Wafer-Level Packaging (WLP) and Its Applications.
Absolute Maximum Ratings
(MAX2657/MAX2658 EV kit. Typical values are at VCC = 2.85V, TA = +25°C, and fRFIN = 1575.42MHz, unless otherwise noted.)
Note 2: Min and max limits guaranteed by test at TA = +85°C and guaranteed by design and characterization at TA = -40°C and
TA = +25°C.
Note 3: Measured with the two tones located at 1MHz and 2MHz offset from the center of the GPS band with -30dBm/tone for
MAX2657 and -27dBm/tone for MAX2658.
Note 4: Measured with input tones at 1713MHz (-25dBm) and 1851MHz (-49dBm).
Note 5: Measured with a tone located at 5MHz offset from the center of the GPS band.
(MAX2657/MAX2658 EV kit. VCC = 1.6V to 3.3V, TA = -40°C to +85°C, fRFIN = 1575.42MHz. Typical values are at VCC = 2.85V and
TA = +25°C, unless otherwise noted.) (Note 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input 1dB Compression point (Note 5) MAX2657 -12.5 dBm
MAX2658 -10
Input Return Loss 10 dB
Output Return Loss 15 dB
Reverse Isolation 30 dB
REVERSE ISOLATION vs. FREQUENCY
MAX2657 toc03
FREQUENCY (MHz)
|S12| (dB)
200015001000
-60
-50
-40
-30
-20
-70
500 2500
MAX2658
MAX2657
GAIN vs. FREQUENCY
MAX2657 toc02
FREQUENCY (MHz)
GAIN (dB)
200015001000
-5
0
5
10
15
20
25
-10
500 2500
MAX2658
MAX2657
INPUT RETURN LOSS vs. FREQUENCY
MAX2657 toc01
FREQUENCY (MHz)
|S11| (dB)
200015001000
-30
-25
-20
-15
-10
-5
0
-35
500 2500
MAX2658
MAX2657
MAX2657/MAX2658 GPS/GNSS Low-Noise Ampliers
www.maximintegrated.com Maxim Integrated
│
3
Typical Operating Characteristics
AC Electrical Characteristics (continued)
(MAX2657/MAX2658 EV kit. Typical values are at VCC = 2.85V, TA = +25°C, and fRFIN = 1575.42MHz, unless otherwise noted.)
IIP3 (dBm)
SUPPLY VOLTAGE (V)
3.02.82.62.42.22.01.81.6 3.2
MAX2658 OUT-OF-BAND IIP3 vs.
SUPPLY VOLTAGE AND TEMPERATURE
(TONE 1 AT 1713MHz, -25dBm;
TONE 2 AT 1851MHz, -49dBm)
MAX2657 toc08
5
6
7
8
9
10
4
-40˚C
+85˚C
+25˚C
MAX2657 OUT-OF-BAND IIP3 vs.
SUPPLY VOLTAGE AND TEMPERATURE
(TONE 1 AT 1713MHz, -25dBm;
TONE 2 AT 1851MHz, -49dBm)
MAX2657 toc07
SUPPLY VOLTAGE (V)
IIP3 (dBm)
3.02.82.62.42.22.01.8
0
1
2
3
-1
1.6
-40˚C
+85˚C
+25˚C
3.2
MAX2658 IN-BAND IIP3 vs.
SUPPLY VOLTAGE AND TEMPERATURE
(TWO TONES LOCATED AT 1MHz AND
2MHz OFFSET WITH -30dBm/TONE)
MAX2657 toc06
SUPPLY VOLTAGE (V)
IIP3 (dBm)
3.02.82.62.42.22.01.8
2
4
6
8
0
1.6
-40˚C
+85˚C
+25˚C
3.2
MAX2657 IN-BAND IIP3 vs.
SUPPLY VOLTAGE AND TEMPERATURE
(TWO TONES LOCATED AT 1MHz AND
2MHz OFFSET WITH -35dBm/TONE)
MAX2657 toc05
SUPPLY VOLTAGE (V)
IIP3 (dBm)
3.02.82.62.42.22.01.8
-4
-3
-2
-1
0
-5
1.6 3.2
-40˚C
+85˚C
+25˚C
OUTPUT RETURN LOSS vs. FREQUENCY
MAX2657 toc04
FREQUENCY (MHz)
|S22| (dB)
200015001000
-20
-15
-10
-5
0
-25
500 2500
MAX2658
MAX2657
MAX2657/MAX2658 GPS/GNSS Low-Noise Ampliers
Maxim Integrated
│
4
www.maximintegrated.com
Typical Operating Characteristics (continued)
(MAX2657/MAX2658 EV kit. Typical values are at VCC = 2.85V, TA = +25°C, and fRFIN = 1575.42MHz, unless otherwise noted.)
MAX2658 INPUT P1dB COMPRESSION vs.
SUPPLY VOLTAGE AND TEMPERATURE
MAX2657 toc10
SUPPLY VOLTAGE (V)
INPUT P1dB (dBm)
3.02.82.62.42.22.01.8
-13
-12
-11
-10
-9
-14
1.6 3.2
-40˚C
+85˚C
+25˚C
SUPPLY VOLTAGE (V)
3.02.82.62.42.22.01.81.6 3.2
MAX2657 toc09
MAX2657 INPUT P1dB COMPRESSION
vs. SUPPLY VOLTAGE AND TEMPERATURE
INPUT P1dB (dBm)
-17
-16
-15
-14
-13
-12
-11
-18
-40˚C
+85˚C
+25˚C
MAX2657/MAX2658 GPS/GNSS Low-Noise Ampliers
Maxim Integrated
│
5
www.maximintegrated.com
Typical Operating Characteristics (continued)
Detailed Description
The MAX2657/MAX2658 are LNAs designed for GPS L1,
Galileo, and GLONASS applications. The devices feature
a power-shutdown control mode to eliminate the need for
an external supply switch. The devices achieve a high
gain and an ultra-low-noise figure.
Input and Output Matching
The MAX2657/MAX2658 require an off-chip input matching.
Only an inductor in series with a DC-blocking capacitor
is needed to form the input matching circuit. The Typical
Application Circuit shows the recommended input-matching
network. These values are optimized for the best simultane-
ous gain, noise figure, and return loss performance. Tables
1 and 2 list typical device S parameters and Kf values. The
MAX2657/MAX2658 integrate an on-chip output matching
to 50Ω at the output, eliminating the need for external
matching components. The value of the input coupling
capacitor affects IIP3. A smaller coupling capacitor results
in lower IIP3.
Shutdown
The MAX2657/MAX2658 include a shutdown feature to
turn off the entire chip. Apply a logic-high to the SHDN
pin to place the part in the active mode, and a logic-low to
place the part in the shutdown mode.
Applications Information
A properly designed PCB is essential to any RF microwave
circuit. Use controlled-impedance lines on all high-fre-
quency inputs and outputs. Bypass VCC with decoupling
capacitors located close to the device. For long VCC lines,
it may be necessary to add decoupling capacitors. Locate
these additional capacitors further away from the device
package. Proper grounding of the GND pins is essential.
If the PCB uses a topside RF ground, connect it directly
to the GND pins. For a board where the ground is not on
the component layer, connect the GND pins to the board
with multiple vias close to the package.
Table 1. MAX2657 Typical S-Parameter Values and K-Factor
Pin Description
FREQ.
(MHz)
S11 MAG
(dB)
S11
PHASE
(Degrees)
S21 MAG
(dB)
S21
PHASE
(Degrees)
S12 MAG
(dB)
S12
PHASE
(Degrees)
S22 MAG
(dB)
S22
PHASE
(Degrees)
Kf
1000 -2.0 -47.7 6.0 -100.0 -47.5 -148.0 -1.0 -55.0 5.1
1100 -2.1 -48.6 7.4 -100.6 -45.7 -150.0 -1.0 -58.1 3.8
1200 -2.2 -51.6 9.6 -107.3 -42.9 -153.5 -1.4 -65.4 3.1
1300 -2.4 -55.0 12.0 -117.2 -39.6 -160.2 -2.1 -74.1 2.5
1400 -2.7 -58.6 14.0 -129.5 -37.0 -168.5 -3.6 -85.5 2.3
1500 -6.5 -61.9 16.2 -146.5 -34.1 178.5 -7.4 -100.0 2.8
1575 -4.3 -62.3 17.1 -164.2 -32.9 162.8 -15.3 -100.8 2.1
1600 -4.6 -61.6 17.3 -170.6 -32.8 156.6 -20.6 -78.9 2.0
1700 -5.4 -55.3 17.1 165.5 -32.5 136.5 -9.5 10.0 1.8
1800 -5.2 -49.8 15.7 145.8 -33.8 121.6 -4.5 -2.4 1.6
1900 -4.8 -47.3 13.9 135.2 -35.2 113.8 -2.7 -13.2 1.6
2000 -4.5 -46.7 12.7 127.3 -36.7 109.6 -1.8 -21.2 1.5
BUMP NAME FUNCTION
A1 SHDN Shutdown Input. A logic-low disables the device.
A2 RFOUT RF Output. RFOUT is internally matched to 50Ω and incorporates an internal DC-blocking capacitor.
B1 RFIN RF Input. Requires a DC-blocking capacitor and external matching components.
B2 VCC Supply Voltage. Bypass to ground with a 33nF capacitor as close as possible to the IC.
C1, C2 GND Ground. Connect to the PCB ground plane.
MAX2657/MAX2658 GPS/GNSS Low-Noise Ampliers
www.maximintegrated.com Maxim Integrated
│
6
Table 4. MAX2658 Typical Noise Parameters (VCC = 2.85V, TA = +25°C)
Table 3. MAX2657 Typical Noise Parameters (VCC = 2.85V, TA = +25°C)
Table 2. MAX2658 Typical S-Parameter Values and K-Factor
FREQUENCY
(MHz)
FMIN
(dB) |GOPT| |GOPT| ANGLE RN (Ω)
1550 0.68 0.28 88.0 4.48
1560 0.68 0.28 88.4 4.48
1570 0.68 0.28 88.8 4.48
1575 0.68 0.28 89.0 4.48
1580 0.68 0.28 89.2 4.48
1590 0.69 0.28 89.6 4.47
1600 0.69 0.28 90.0 4.47
FREQUENCY (MHz) FMIN
(dB) |GOPT| |GOPT| ANGLE RN (Ω)
1550 0.68 0.44 47.7 8.39
1560 0.68 0.44 48.1 8.38
1570 0.68 0.44 48.3 8.37
1575 0.68 0.44 48.5 8.36
1580 0.68 0.44 48.6 8.36
1590 0.68 0.44 48.9 8.35
1600 0.68 0.44 49.2 8.34
FREQ.
(MHz)
S11 MAG
(dB)
S11
PHASE
(Degrees)
S21 MAG
(dB)
S21
PHASE
(Degrees)
S12 MAG
(dB)
S12
PHASE
(Degrees)
S22 MAG
(dB)
S22
PHASE
(Degrees)
Kf
1000 -3.0 -57.0 10.8 -120.0 -43.0 -154.0 -1.3 -65.0 3.2
1100 -3.3 -58.2 11.6 -124.5 -42.1 -155.0 -1.6 -70.2 3.3
1200 -3.5 -60.0 13.4 -134.6 -39.3 -160.5 -2.4 -79.6 2.8
1300 -3.8 -62.3 14.9 -148.0 -37.2 -168.3 -4.0 -90.0 2.7
1400 -4.3 -63.3 15.9 -162.3 -35.4 -178.2 -7.3 -101.0 2.7
1500 -4.9 -62.0 16.6 -178.9 -33.9 171.0 -14.5 -100.6 2.6
1575 -5.3 -59.7 16.6 168.0 -33.5 161.7 -19.6 -26.0 2.5
1600 -5.4 -58.5 16.5 163.9 -33.6 157.5 -16.7 -6.0 2.5
1700 -5.5 -53.7 15.8 149.3 -33.6 148.3 -9.0 3.6 2.3
1800 -5.3 -50.3 14.7 136.8 -34.2 142.5 -5.7 -2.8 2.2
1900 -5.1 -48.0 13.4 130.0 -35.1 139.6 -4.0 -9.6 2.3
2000 -4.9 -46.3 12.7 123.9 -35.8 138.6 -3.0 -15.0 2.1
MAX2657/MAX2658 GPS/GNSS Low-Noise Ampliers
www.maximintegrated.com Maxim Integrated
│
7
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND PATTERN
NO.
6 WLP W61B1+1 21-0217 90-0226
MAX2657/MAX2658 GPS/GNSS Low-Noise Ampliers
www.maximintegrated.com Maxim Integrated
│
8
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
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 9/09 Initial release —
1 4/14 Updated Applications 1
Revision History
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 specications 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.
MAX2657/MAX2658 GPS/GNSS Low-Noise Ampliers
© 2014 Maxim Integrated Products, Inc.
│
9
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
