AD6122
40
20
VGAIN = 2.0V
0
VGAIN = 2.5V
–20
VGAIN = 1.5V
–40
VGAIN = 1.0V
–60
–80
50
VGAIN = 0.5V
100
150
200
250
300
350
FREQUENCY – MHz
Figure 18. IF Amplifier Gain vs. Frequency for
VGAIN = 2.5 V, 2.0 V, 1.5 V, 1.0 V
18.0
16.0
14.0
12.0
10.0
8.0
0.5
1.0
1.5
2.0
2.5
VGAIN – V
Figure 19. Total Current Consumption vs. VGAIN
REF LEV
–30dBm
–30
–40
–50
–60
RBW
VBW
SWT
11
30kHz
300kHz
2s
UNIT
dBm
1 (T1) –46.78dBm A
130.38000000MHz
CH PWR –31.93dBm
ACP UP –66.95dB
AVE LOW –68.95dB
1 (T1)
–0.28 dB
330.66132265kHz
–70
–80
–90
–100
–110
CL1
–120
CO
CO
CU1
–130
CENTER 130.38MHz
600kHz/DIV
SPAN 6MHz
Figure 20. ACPR of Cascaded Modulator, 20 dB Pad and IF
Amplifier: Spectral Plot
–10–
REV. B