Rainbow Electronics MAX2769B - Manual (Page 6)

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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.)
LNA2 |S21| AND |S12|
vs. FREQUENCY
MAX2769B toc0
7
FREQUENCY (GHz)
LNA2 |S21| AND |S12| (dB)
2.25 2.00 0.75 1.00 1.25 1.50 1.75
-40
-30
-20
-10
0
10
20
30
-50
0.50 2.50
|S21|
|S12|
LNA2 GAIN AND NOISE FIGURE
vs. TEMPERATURE
MAX2769B toc08
TEMPERATURE (°C)
NOISE FIGURE (dB)
60 35 10 -15
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0
-40 85
LNA2 GAIN (dB)
12.8
13.0
13.2
13.4
13.6
12.2
12.6
12.4
LNA BIAS = 10
NOISE FIGURE
GAIN
LNA INPUT RETURN LOSS
vs. FREQUENCY
MAX2769B toc0
9
FREQUENCY (GHz)
LNA INPUT RETURN LOSS (dB)
2.1 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1
-40
-30
-20
-10
0
-50
1.0 2.2
LNA1
LNA2
LNA OUTPUT RETURN LOSS
vs. FREQUENCY
MAX2769B toc1
0
FREQUENCY (GHz)
LNA OUTPUT RETURN LOSS (dB)
2.1 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1
-15
-10
-5
0
-20
1.0 2.2
LNA1
LNA2
MIXER INPUT REFERRED IP1dB
vs. OFFSET FREQUENCY
MAX2769B toc1
1
OFFSET FREQUENCY (MHz)
MIXER INPUT REFERRED IP1dB (dB)
250 200 150 100 50
-80
-70
-60
-50
-40
-30
-20
-10
0
-90
0 300
P RF = -100dBm
PGA GAIN = 51dB
PGA GAIN = 32dB