Analog Devices manual AD600/AD602, Rev. A

	90
	80
	70
– dB	60
	50
GAIN
	40
OVERALL
	20
	30		A1		COM	B	INED
									A2
	10
	0
	–10
	–0.5	0.0	0.5	1.0	1.5			2.0	2.5	3.0

VC

Figure 5. Plot of Separate and Overall Gains in Sequential Control

	5
	4
	3
	2
– dB	1
	0
ERROR	–1
GAIN	–2
	–3
	–4
	–5
	–6
	–7
	–8
	–0.5	0.0	0.5	1.0	1.5	2.0	2.5	3.0

VC

Figure 6. Gain Error for Cascaded Stages—Sequential Control

	5
	4
	3
	2
dB	1
–
	–1
ERROR
	0
GAIN	–2
	–3
	–4
	–5
	–0.1	0	0.2	0.4	0.6	0.8	1.0	1.2
					VC

Figure 7. Gain Error for Cascaded Stages—Parallel Control

AD600/AD602

	75
	70
	65
– dB	60
	55
RATIO
	50
S/N	45
	40
	35
	30
	0.0	0.2	0.4	0.6	0.8	1.0	1.2	1.4

VC

Figure 8. SNR for Cascaded Stages—Parallel Control

	1.2
	1.0
	0.8
dB–	0.6
	0.4
ERROR	0.2
	0.0
GAIN	–0.2
	–0.4
	–0.6

–0.8

–1.0

–1.2

0.00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 VC

Figure 9. Gain Error for Cascaded Stages—Low Ripple Mode

	80
	75
	70
– dB	65
	60
RATIO
	55
S/N	50
	45
	40
	35
				0.6	0.8	1.0	1.2	1.4
	0.0	0.2	0.4

VC

Figure 10. ISNR vs. Control Voltage—Low Ripple Mode

REV. A –7–