Analog Devices AD602 - Manual (Page 7)

AD600/AD602
REV. A –7–
90
–10
3.0
20
0
0.0
10
–0.5
50
30
40
60
70
80
2.5 2.0 1.5 1.0 0.5
V C
OVERALL GAIN – dB
A1
COMBINED
A2
Figure 5. Plot of Separate and Overall Gains in Sequential
Control
5
–8
3.0
–5
–7
0.0
–6
–0.5
–2
–4
–3
–1
1
2
4
3
0
2.0 2.5 1.5 1.0 0.5
V C
GAIN ERROR – dB
Figure 6. Gain Error for Cascaded Stages—Sequential
Control
5
–3
–5
0
–4
–0.1
0
–2
–1
1
2
3
4
1.2 1.0 0.8 0.4 0.2 0.6
GAIN ERROR – dB
V
C
Figure 7. Gain Error for Cascaded Stages—Parallel
Control
75
30
1.4
40
35
0.2 0.0
45
50
55
60
65
70
1.2 1.0 0.8 0.6 0.4
V
C
S/N RATIO – dB
Figure 8. SNR for Cascaded Stages—Parallel Control
1.2
–1.2
1.3
–0.6
–1.0
0.1
–0.8
0.0
0.0
–0.4
–0.2
0.2
0.4
0.6
1.0
0.8
1.2 1.1 1.0 0.9 0.7 0.6 0.5 0.4 0.3 0.2 0.8
GAIN ERROR – dB
V
C
Figure 9. Gain Error for Cascaded Stages—Low Ripple
Mode
80
35
1.4
45
40
0.2 0.0
50
55
60
65
70
75
1.2 1.0 0.8 0.6 0.4
V
C
S/N RATIO – dB
Figure 10. ISNR vs. Control Voltage—Low Ripple Mode