
MAX2769B
Universal GPS Receiver
Typical Operating Characteristics (continued)
(MAX2769B EV kit, V CC_ = 2.7V to 3.3V, T A = -40°C to +85 N C, PGM = Ground. Registers are set to the default power-up states. LNA
input is driven from a 50 I 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 I ||7.5pF on each pin. Typical
values are at V CC_ = 2.85V and T A = +25 N C, unless otherwise noted.)
0
-5
-10
1dB CASCADED NOISE FIGURE DESENSITIZATION vs. JAMMER FREQUENCY
MAX2769B toc12a MAX2769B toc12b
16
14
12
MIXER INPUT REFERRED NOISE FIGURE
vs. PGA GAIN
10
-15
8
-20
800
825
850
875
900
925 950 1800 1850
JAMMER FREQUENCY (MHz)
1900
1950
2000
2050
2100
6
5
15
25 35 45
PGA GAIN (dB)
55
65
3RD-ORDER POLYPHASE FILTER MAGNITUDE
RESPONSE vs. BASEBAND FREQUENCY
5TH-ORDER POLYPHASE FILTER MAGNITUDE
RESPONSE vs. BASEBAND FREQUENCY
MIXER INPUT REFERRED GAIN
vs. PGA GAIN CODE
10
0
-10
-20
FBW = 00b
10
0
-10
-20
FBW = 00b
100
80
T A = -40°C
T A = +25°C
-30
60
-30
-40
-50
-40
-50
-60
40
T A = +85°C
-60
1
2
3
4
5
6
7
8
9
10
-70
1
2
3
4
5
6
7
8
9
10
20
0 5 10 15 20 25 30 35 40 45 50 55 60 65
BASEBAND FREQUENCY (MHz)
Maxim Integrated
BASEBAND FREQUENCY (MHz)
PGA GAIN CODE (DECIMAL FORMAT)
7