19-4956; Rev 0; 9/09
KIT
ATION
EVALU
BLE
AVAILA
GPS/GNSS Low-Noise Amplifiers
General Description
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)
MAX2657/MAX2658
The MAX2657/MAX2658 high-gain, low-noise amplifiers
(LNAs) are designed for GPS L1, Galileo, and
GLONASS applications. Designed in Maxim’s
advanced SiGe process, 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
Automotive Navigation
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
Ordering Information
PART
MAX2657EWT+T
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
6 WLP
MAX2658EWT+T
-40°C to +85°C
6 WLP
+Denotes
a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Pin Configuration/Typical Application Circuit
+
SHDN
A1
MAX2657
MAX2658
BIAS
A2
RFOUT
RF
OUTPUT
V
CC
C1
RF
INPUT
L1
RFIN
B1
B2
V
CC
C2
GND
C1
C2
GND
L1 = 6.2nH (MAX2657)
C1 = 820pF (MAX2657)
C2 = 33nF
L1 = 2.7nH (MAX2658)
C1 = 1500pF (MAX2658)
________________________________________________________________
Maxim Integrated Products
1
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.
GPS/GNSS Low-Noise Amplifiers
MAX2657/MAX2658
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ...........................................................-0.3V to +3.6V
Other Pins to GND .................-0.3V to (+ Operating V
CC
+ 0.3V)
Maximum RF Input Power ...............................................+5dBm
Continuous Power Dissipation (T
A
= +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)
Note 1:
Refer to Application Note 1891:
Wafer-Level Packaging (WLP) and Its Applications.
CAUTION!
ESD SENSITIVE DEVICE
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.
DC ELECTRICAL CHARACTERISTICS
(MAX2657/MAX2658 EV kit. V
CC
= 1.6V to 3.3V, T
A
= -40°C to +85°C, no RF signals are applied. Typical values are at V
CC
= 2.85V
and T
A
= +25°C, unless otherwise noted.) (Note 2)
PARAMETER
Supply Voltage
Supply Current
Digital Input Logic-High
Digital Input Logic-Low
Digital Input Current
SHDN
= high
Shutdown mode,
SHDN
= low
1.2
0.45
1
MAX2657
MAX2658
CONDITIONS
MIN
1.6
TYP
2.85
4.1
7.7
1
MAX
3.3
UNITS
V
mA
µA
V
V
µA
AC ELECTRICAL CHARACTERISTICS
(MAX2657/MAX2658 EV kit. V
CC
= 1.6V to 3.3V, T
A
= -40°C to +85°C, f
RFIN
= 1575.42MHz. Typical values are at V
CC
= 2.85V and
T
A
= +25°C, unless otherwise noted.) (Note 2)
PARAMETER
RF Frequency
L1 band
V
CC
= 2.85V
Power Gain
V
CC
= 1.6V
Noise Figure
In-Band 3rd-Order Input Intercept
(Note 3)
Point
Out-of-Band 3rd-Order Input
Intercept Point
(Note 4)
MAX2657
MAX2658
MAX2657
MAX2658
V
CC
= 1.8V
V
CC
= 3.3V
MAX2657
MAX2658
MAX2657
MAX2658
CONDITIONS
MIN
TYP
1575.42
19.5
17.7
19.4
17.6
0.8
0.8
-3.5
+4.5
+2.5
+8
dB
dBm
dBm
dB
MAX
UNITS
MHz
2
_______________________________________________________________________________________
GPS/GNSS Low-Noise Amplifiers
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2657/MAX2658 EV kit. V
CC
= 1.6V to 3.3V, T
A
= -40°C to +85°C, f
RFIN
= 1575.42MHz. Typical values are at V
CC
= 2.85V and
T
A
= +25°C, unless otherwise noted.) (Note 2)
PARAMETER
Input 1dB Compression point
Input Return Loss
Output Return Loss
Reverse Isolation
(Note 5)
CONDITIONS
MAX2657
MAX2658
MIN
TYP
-12.5
-10
10
15
30
MAX
UNITS
dBm
dB
dB
dB
MAX2657/MAX2658
Note 2:
Note 3:
Note 4:
Note 5:
Min and max limits guaranteed by test at T
A
= +85°C and guaranteed by design and characterization at T
A
= -40°C and
T
A
= +25°C.
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.
Measured with input tones at 1713MHz (-25dBm) and 1851MHz (-49dBm).
Measured with a tone located at 5MHz offset from the center of the GPS band.
Typical Operating Characteristics
(MAX2657/MAX2658 EV kit. Typical values are at V
CC
= 2.85V, T
A
= +25°C, and f
RFIN
= 1575.42MHz, unless otherwise noted.)
INPUT RETURN LOSS vs. FREQUENCY
MAX2657 toc01
GAIN vs. FREQUENCY
MAX2657
20
15
GAIN (dB)
10
5
0
-5
-10
-60
-70
500
1000
1500
FREQUENCY (MHz)
2000
2500
|S12| (dB)
-40
-50
MAX2658
MAX2657 toc02
REVERSE ISOLATION vs. FREQUENCY
MAX2657 toc03
0
-5
-10
|S11| (dB)
-15
-20
-25
-30
-35
500
1000
1500
FREQUENCY (MHz)
2000
MAX2657
MAX2658
25
-20
-30
MAX2658
MAX2657
2500
500
1000
1500
FREQUENCY (MHz)
2000
2500
_______________________________________________________________________________________
3
GPS/GNSS Low-Noise Amplifiers
MAX2657/MAX2658
Typical Operating Characteristics (continued)
(MAX2657/MAX2658 EV kit. Typical values are at V
CC
= 2.85V, T
A
= +25°C, and f
RFIN
= 1575.42MHz, unless otherwise noted.)
MAX2657 IN-BAND IIP3 vs.
SUPPLY VOLTAGE AND TEMPERATURE
(TWO TONES LOCATED AT 1MHz AND
2MHz OFFSET WITH -35dBm/TONE)
MAX2657 toc04
MAX2657 toc05
OUTPUT RETURN LOSS vs. FREQUENCY
0
-5
-10
MAX2658
-15
-20
-25
500
1000
1500
FREQUENCY (MHz)
2000
2500
0
-1
-2
MAX2658 IN-BAND IIP3 vs.
SUPPLY VOLTAGE AND TEMPERATURE
(TWO TONES LOCATED AT 1MHz AND
2MHz OFFSET WITH -30dBm/TONE)
MAX2657 toc06
8
MAX2657
6
IIP3 (dBm)
-40˚C
4
+25˚C
+25˚C
2
+85˚C
0
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
IIP3 (dBm)
|S22| (dB)
-40˚C
-3
-4
+85˚C
-5
MAX2657 OUT-OF-BAND IIP3 vs.
SUPPLY VOLTAGE AND TEMPERATURE
(TONE 1 AT 1713MHz, -25dBm;
TONE 2 AT 1851MHz, -49dBm)
MAX2657 toc07
MAX2658 OUT-OF-BAND IIP3 vs.
SUPPLY VOLTAGE AND TEMPERATURE
(TONE 1 AT 1713MHz, -25dBm;
TONE 2 AT 1851MHz, -49dBm)
MAX2657 toc08
3
10
9
+85˚C
8
IIP3 (dBm)
7
6
+25˚C
2
IIP3 (dBm)
+85˚C
1
-40˚C
+25˚C
0
5
-1
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
SUPPLY VOLTAGE (V)
4
1.6
-40˚C
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
SUPPLY VOLTAGE (V)
4
_______________________________________________________________________________________
GPS/GNSS Low-Noise Amplifiers
Typical Operating Characteristics (continued)
(MAX2657/MAX2658 EV kit. Typical values are at V
CC
= 2.85V, T
A
= +25°C, and f
RFIN
= 1575.42MHz, unless otherwise noted.)
MAX2657/MAX2658
MAX2657 INPUT P1dB COMPRESSION
vs. SUPPLY VOLTAGE AND TEMPERATURE
MAX2657 toc09
MAX2658 INPUT P1dB COMPRESSION vs.
SUPPLY VOLTAGE AND TEMPERATURE
MAX2657 toc10
-11
-12
INPUT P1dB (dBm)
-13
-14
-15
-16
-17
-18
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
-40˚C
+85˚C
+25˚C
-9
-10
INPUT P1dB (dBm)
-11
-12
-13
-40˚C
-14
+85˚C
+25˚C
3.2
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5
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