
Digitally Controlled, Variable-Gain, Differential
ADC Driver/Amplifier
Typical Operating Characteristics (continued)
( Circuit of Figure 2 , V CC = 5.0V, R 1 = 909 Ω , max gain, (B0 = B1 = B2 = B3 = B4 = 0), P OUT = 5dBm, T A = +25°C, unless otherwise
noted.)
8.0
NOISE FIGURE vs. FREQUENCY
27
OUTPUT P-1dB vs. FREQUENCY
27
OUTPUT P-1dB vs. FREQUENCY
7.5
7.0
T A = +85°C
26
T A = +85°C
26
V CC = +5.25V
6.5
25
25
6.0
24
T A = -40°C
T A = +25 ° C
24
V CC = +4.75V
V CC = +5V
5.5
T A = +25°C
23
23
5.0
4.5
4.0
T A = -40°C
22
21
22
21
30
60
90 120 150 180 210 240 270 300
30
60
90 120 150 180 210 240 270 300
30
60
90 120 150 180 210 240 270 300
44
FREQUENCY (MHz)
OUTPUT IP3 vs. FREQUENCY
44
FREQUENCY (MHz)
OUTPUT IP3 vs. FREQUENCY
55
FREQUENCY (MHz)
INPUT IP3 vs. ATTENUATION STATE
P RF1 = P RF2 = 5dBm
42
40
T A = +25°C
42
40
V CC = +5.25V
V CC = +4.75V
50
45
AT OUTPUT, Δ f = 1MHz,
f IN = 70MHz
40
38
T A = +85°C
38
V CC = +5V
35
36
36
30
34
T A = -40°C
34
25
32
P RF1 = P RF2 = 5dBm
32
P RF1 = P RF2 = 5dBm
20
AT OUTPUT, Δ f = 1MHz
AT OUTPUT, Δ f = 1MHz
30
30
15
30
60
90 120 150 180 210 240 270 300
30
60
90 120 150 180 210 240 270 300
0
4
8
12
16
20
24
-55
-60
FREQUENCY (MHz)
3RD HARMONIC vs. FREQUENCY
-55
-60
FREQUENCY (MHz)
3RD HARMONIC vs. FREQUENCY
-50
-55
ATTENUATION STATE
2ND HARMONIC vs. FREQUENCY
-65
-65
-60
-65
T A = -40°C
T A = +25°C
-70
T A = -40°C
-70
V CC = +5.25V
-70
V CC = +5V
-75
-75
-75
-80
-80
T A = +85°C
T A = +25°C
-80
V CC = +4.75V
-85
T A = +85°C
-85
-85
-90
30
60
90 120 150 180 210 240 270 300
30
60
90 120 150 180 210 240 270 300
30
60
90 120 150 180 210 240 270 300
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
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7