Max2769b universal gps receiver, Typical operating characteristics (continued) – Rainbow Electronics MAX2769B User Manual
Page 7
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MAX2769B
Universal GPS Receiver
Typical Operating Characteristics (continued)
(MAX2769B EV kit, V
CC_
= 2.7V to 3.3V, T
A
= -40°C to +85NC, PGM = Ground. Registers are set to the default power-up states. LNA
input is driven from a 50I 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 10kI||7.5pF on each pin. Typical
values are at V
CC_
= 2.85V and T
A
= +25NC, unless otherwise noted.)
1dB CASCADED NOISE FIGURE DESENSITIZATION vs. JAMMER FREQUENCY
MAX2769B toc12a
JAMMER FREQUENCY (MHz)
JAMMER POWER (dBm)
925
900
875
850
825
-15
-10
-5
0
-20
800
950
MAX2769B toc12b
2050
2000
1950
1900
1850
1800
2100
MIXER INPUT REFERRED NOISE FIGURE
vs. PGA GAIN
MAX2769B toc1
3
PGA GAIN (dB)
MIXER INPUT REFERRED NOISE FIGURE (dB)
55
45
35
25
15
8
10
12
14
16
6
5
65
3RD-ORDER POLYPHASE FILTER MAGNITUDE
RESPONSE vs. BASEBAND FREQUENCY
MAX2769B toc1
4
BASEBAND FREQUENCY (MHz)
MAGNITUDE (dB)
9
8
7
6
5
4
3
2
-50
-40
-30
-20
-10
0
10
-60
1
10
FBW = 00b
5TH-ORDER POLYPHASE FILTER MAGNITUDE
RESPONSE vs. BASEBAND FREQUENCY
MAX2769B toc1
5
BASEBAND FREQUENCY (MHz)
MAGNITUDE (dB)
9
8
7
6
5
4
3
2
-60
-50
-40
-30
-20
-10
0
10
-70
1
10
FBW = 00b
MIXER INPUT REFERRED GAIN
vs. PGA GAIN CODE
MAX2769B toc1
6
PGA GAIN CODE (DECIMAL FORMAT)
MIXER INPUT REFERRED GAIN (dB)
60
55
50
45
40
35
30
25
20
15
10
5
40
60
80
100
20
0
65
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C