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MAX2769
Universal GPS Receiver
AC ELECTRICAL CHARACTERISTICS
(MAX2769 EV kit, V CC = 2.7V to 3.3V, T A = -40 ° C to +85 ° C, PGM = GND. Registers are set to the default power-up states. LNA input
is driven from a 50 Ω source. All RF measurements are done in the analog output mode with ADC bypassed. PGA gain is set to 51dB
gain by serial-interface word GAININ = 111010. Maximum IF output load is not to exceed 10k Ω || 7.5pF on each pin. Typical values
are at V CC = 2.85V and T A = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
CASCADED RF PERFORMANCE
RF Frequency
Noise Figure
Out-of-Band 3rd-Order Input
Intercept Point
In-Band Mixer Input Referred
1dB Compression Point
Mixer Input Return Loss
Image Rejection
Spurs at LNA1 Input
L1 band
LNA1 input active, default mode (Note 3)
LNA2 input active, default mode (Note 3)
Measured at the mixer input
Measured at the mixer input (Note 4)
Measured at the mixer input
LO leakage
Reference harmonics leakage
1575.42
1.4
2.7
10.3
-7
-85
10
25
-101
-103
MHz
dB
dBm
dBm
dB
dB
dBm
Maximum Voltage Gain
Variable Gain Range
Measured from the mixer to the baseband analog output
91
55
96
59
103
dB
dB
FILTER RESPONSE
Passband Center Frequency
FBW = 00
4
2.5
MHz
Passband 3dB Bandwidth
Lowpass 3dB Bandwidth
FBW = 10
FBW = 01
FBW = 11
4.2
8
9
MHz
MHz
Stopband Attenuation
3rd-order filter, bandwidth = 2.5MHz, measured at 4MHz offset
5th-order filter, bandwidth = 2.5MHz, measured at 4MHz offset
41
30
49.5
dB
LNA
LNA1 INPUT
Power Gain
Noise Figure
19
0.83
dB
dB
Input IP3
Output Return Loss
Intput Return Loss
(Note 5)
-1.1
10
8
dBm
dB
dB
LNA2 INPUT
Power Gain
Noise Figure
13
1.14
dB
dB
Input IP3
Output Return Loss
Input Return Loss
Maxim Integrated
(Note 5)
1
19
11
dBm
dB
dB
3
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