Digitally Controlled, Variable-Gain, Differential
ADC Driver/Amplifier
Typical Operating Characteristics (continued)
( Circuit of Figure 1 , V CC = 5.0V, R 1 = 1.13k Ω , max gain (B0 = B1 = B2 = B3 = B4 = 0), P OUT = 5dBm, T A = +25°C, unless other-
wise noted.)
-55
3RD HARMONIC vs. FREQUENCY
-55
3RD HARMONIC vs. FREQUENCY
-60
2ND HARMONIC vs. FREQUENCY
-60
T A = -40°C
-60
-65
T A = -40°C
T A = +85°C
V CC = +5.25V
-65
-65
-70
-70
-75
-80
-85
T A = +85°C
T A = +25°C
-70
-75
-80
-85
V CC = +4.75V
V CC = +5V
-75
-80
-85
-90
T A = +25°C
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
-60
FREQUENCY (MHz)
2ND HARMONIC vs. FREQUENCY
85
FREQUENCY (MHz)
OUTPUT IP2 vs. FREQUENCY (f 1 + f 2 )
85
FREQUENCY (MHz)
OUTPUT IP2 vs. FREQUENCY (f 1 + f 2 )
-65
-70
V CC = +5.25V
80
75
T A = +25°C
80
75
V CC = +4.75V
V CC = +5.0
-75
70
70
-80
V CC = +5V
V CC = +4.75V
65
60
T A = -40°C
T A = +85°C
65
60
V CC = +5.25V
-85
-90
55
50
P RF1 = P RF2 = 5dBm
AT OUTPUT, Δ f = 1MHz
55
50
P RF1 = P RF2 = 5dBm
AT OUTPUT, Δ f = 1MHz
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)
OUTPUT-PORT AMPLITUDE UNBALANCE
vs. FREQUENCY
0.25
0.20
FREQUENCY (MHz)
3.0
2.5
FREQUENCY (MHz)
OUTPUT-PORT PHASE UNBALANCE
vs. FREQUENCY
2.0
0.15
1.5
0.10
1.0
0.05
0
0.5
0
30
60
90 120 150 180 210 240 270 300
30
60
90 120 150 180 210 240 270 300
FREQUENCY (MHz)
FREQUENCY (MHz)
_______________________________________________________________________________________
5
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