Owner's manual

MAX2657/MAX2658
GPS/GNSS Low-Noise Amplifiers
_______________________________________________________________________________________ 3
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 CONDITIONS MIN TYP MAX UNITS
MAX2657 -12.5
Input 1dB Compression point (Note 5)
MAX2658 -10
dBm
Input Return Loss 10 dB
Output Return Loss 15 dB
Reverse Isolation 30 dB
Note 2: 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.
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.
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
FREQUENCY (MHz)
|S11| (dB)
200015001000
-30
-25
-20
-15
-10
-5
0
-35
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
REVERSE ISOLATION vs. FREQUENCY
MAX2657 toc03
FREQUENCY (MHz)
|S12| (dB)
200015001000
-60
-50
-40
-30
-20
-70
500 2500
MAX2658
MAX2657