DG201B/202B

Vishay Siliconix

Document Number: 70037

S-52433—Rev. G, 06-Sep-99

www.vishay.com

S FaxBack 408-970-5600

4-9

APPLICATIONS

FIGURE 8. A Precision Amplifier with Digitally Programable Input and Gains

Gain =

Gain 1 (x1)

Gain 2 (x10)

Gain 3 (x100)

Gain 4 (x1000)

–15 V

+15 V

–15 V

GND

DG419

30 pF

+15 V

+15 V

–15 V

DG202B

Logic High = Switch On

+

–

LM101A

CH

18 k

W

9.9 k

W

100 k

W

100

W

100

W

2 k

W

V+

V–

GND

V–

+5 V