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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
(Note 5)
CONDITIONS
MAX2657
MAX2658
MIN
TYP
-12.5
-10
MAX
UNITS
dBm
Input Return Loss
Output Return Loss
Reverse Isolation
10
15
30
dB
dB
dB
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.)
0
INPUT RETURN LOSS vs. FREQUENCY
25
GAIN vs. FREQUENCY
MAX2657
-20
REVERSE ISOLATION vs. FREQUENCY
-5
MAX2658
20
MAX2658
-30
MAX2658
-10
15
-15
10
-40
-20
-25
-30
-35
MAX2657
5
0
-5
-10
-50
-60
-70
MAX2657
500
1000
1500
2000
2500
500
1000
1500
2000
2500
500
1000
1500
2000
2500
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
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3
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