DG308B/309B

Vishay Siliconix

www.vishay.com

S FaxBack 408-970-5600

4-6

Document Number: 70047

S-52896—Rev. E, 14-Jul-97

TEST CIRCUITS

FIGURE 3. Off Isolation

S

IN

50

W

D

0V, 15 V

Off Isolation = 20 log

V+

–15 V

GND

V–

C

C

+15 V

0V, 15 V

+15 V

–15 V

GND

V+

V–

NC

C

C

0V, 15 V

50

W

C = RF bypass

FIGURE 4. Channel-to-Channel Crosstalk

50

W

FIGURE 5. Charge Injection

1000 pF

12 V

D

V+

V–

–15 V

GND

IN

S

+15 V

ON

ON

OFF

APPLICATIONS

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

DG308B

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

FIGURE 6. A Precision Amplifier with Digitally Programmable Inputs and Gains