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
Soldering Temperature (reflow) (Note 1) ........................+260°C
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.
PACKAGE THERMAL CHARACTERISTICS (Note 2)
WLP
Junction-to-Ambient Thermal Resistance (q
JA
) ........103°C/W
Note 2:
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.maxim-ic.com/thermal-tutorial.
DC ELECTRICAL CHARACTERISTICS
(MAX2687/MAX2689/MAX2694 EV kit, V
CC
= 1.6V to 3.6V, T
A
= -40NC to +85NC, no RF signals are applied. Typical values are at V
CC
= 2.85V and T
A
= +25NC, unless otherwise noted.) (Note 3)
PARAMETER
Supply Voltage
MAX2687
Supply Current
SHDN
= high
MAX2689
MAX2694
Shutdown mode, V
SHDN
= 0V
(Note 4)
(Note 4)
1.2
0.45
CONDITIONS
MIN
1.6
TYP
2.85
7.6
7.6
4.5
20
µA
V
V
mA
MAX
3.6
UNITS
V
Digital Input Logic-High
Digital Input Logic-Low
AC ELECTRICAL CHARACTERISTICS
(MAX2687/MAX2689/MAX2694 EV kit, V
CC
= 1.6V to 3.6V, T
A
= -40NC to +85NC, f
RFIN
= 1575.42MHz. Typical values are at V
CC
=
2.85V and T
A
= +25NC, unless otherwise noted.) (Note 3)
PARAMETER
RF Frequency
L1 band
MAX2687
V
CC
= 2.85V (Note 5)
Power Gain
V
CC
= 1.6V
MAX2689
MAX2694
MAX2687
MAX2689
MAX2694
14.7
12.1
11.9
14.0
11.8
8.7
CONDITIONS
MIN
TYP
1575.42
17.8
15.1
11.6
17.7
15
11.5
dB
MAX
UNITS
MHz
2
GPS/GNSS Low-Noise Amplifiers
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2687/MAX2689/MAX2694 EV kit, V
CC
= 1.6V to 3.6V, T
A
= -40NC to +85NC, f
RFIN
= 1575.42MHz. Typical values are at V
CC
=
2.85V and T
A
= +25NC, unless otherwise noted.) (Note 3)
PARAMETER
Noise Figure
V
CC
= 1.6V to 3.3V
CONDITIONS
MAX2687
MAX2689
MAX2694
In-Band 3rd-Order Input
Intercept Point
Out-of-Band 3rd-Order Input
Intercept Point
MAX2687
(Note 6)
MAX2689
MAX2694
MAX2687
(Note 7)
MAX2689
MAX2694
MAX2687
Input 1dB Compression Point
(Note 8)
MAX2687
Input Return Loss
MAX2689
MAX2694
MAX2687
Output Return Loss
MAX2689
MAX2694
MAX2687
Reverse Isolation
MAX2689
MAX2694
MAX2689
MAX2694
MIN
TYP
0.85
1.2
0.97
5.5
5.1
6.85
9.146
8
8.644
-9.3
-8.9
-2.25
7.8
9
16.8
20.7
15.2
11.6
43.9
43.3
21.5
dB
dB
dB
dBm
dBm
dBm
dB
MAX
UNITS
MAX2687/MAX2689/MAX2694
Note 3:
Min and max limits guaranteed by test at T
A
= +25°C and guaranteed by design and characterization at T
A
= -40°C and
T
A
= +85°C, unless otherwise noted.
Note 4:
Min and max limits guaranteed by test at T
A
= +25°C.
Note 5:
Min limit guaranteed by design and characterization.
Note 6:
Measured with the two tones located at 1MHz and 2MHz offset from the center of the GPS band with -27dBm/tone for the
MAX2687, -30dBm/tone for the MAX2689, and -24dBm/tone for the MAX2694.
Note 7:
Measured with input tones at 1713MHz (-27dBm) and 1851MHz (-39dBm).
Note 8:
Measured with a tone located at the center of the GPS band.
3
GPS/GNSS Low-Noise Amplifiers
MAX2687/MAX2689/MAX2694
Typical Operating Characteristics
(MAX2687/MAX2689/MAX2694 EV kit. Typical values are at V
CC
= 2.85V, T
A
= +25°C, and f
RFIN
= 1575.42MHz, unless otherwise noted.)
MAX2687
INPUT RETURN LOSS vs. FREQUENCY
MAX2687 toc01
GAIN vs. FREQUENCY
MAX2687 toc02
REVERSE ISOLATION vs. FREQUENCY
MAX2687 toc03
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
500
1000
1500
2000
FREQUENCY (MHz)
20
18
16
14
-20
-30
-40
GAIN (dB)
|
S11
|
(dB)
10
8
6
4
2
0
|
S12
|
(dB)
500
1000
1500
2000
FREQUENCY (MHz)
2500
12
-50
-60
-70
-80
500
1000
1500
FREQUENCY (MHz)
2000
2500
2500
OUTPUT RETURN LOSS vs. FREQUENCY
MAX2687 toc04
IN-BAND IIP3 vs. SUPPLY VOLATAGE
AND TEMPERATURE
MAX2687 toc05
OUT-OF-BAND IIP3 vs. SUPPLY VOLTAGE
AND TEMPERATURE
fTONE 1 = 1713MHz
PTONE 1 = -27dBm
fTONE 2 = 1851MHz
PTONE 2 = -39dBm
MAX2687 toc06
5
0
-5
10
8
T
A
= -40°C
IIP3 (dBm)
6
4
2
0
T
A
= +25°C
T
A
= +85°C
16
14
12
IIP3 (dBm)
10
8
6
4
+85°C
|
S22
|
(dB)
-10
-50
-20
-25
500
1000
1500
FREQUENCY (MHz)
2000
2500
+25°C
-40°C
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
SUPPLY VOLTAGE (V)
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
SUPPLY VOLTAGE (V)
INPUT P1dB vs. SUPPLY VOLATAGE
AND TEMPERATURE
MAX2687 toc07
-10
-11
INPUT P1dB (dBm)
-12
-13
-14
-15
T
A
= -40°C
T
A
= +25°C
1dB GAIN DESENSE
vs. BLOCKER FREQUENCY
MAX2687 toc08
0
-5
|BLOCKER POWER| (dBm)
-10
-15
-20
-25
T
A
= +85°C
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
SUPPLY VOLTAGE (V)
-30
500
1000
1500
2000
2500
BLOCKER FREQUENCY (MHz)
4
GPS/GNSS Low-Noise Amplifiers
MAX2687/MAX2689/MAX2694
Typical Operating Characteristics (continued)
(MAX2687/MAX2689/MAX2694 EV kit. Typical values are at V
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