DG411/412/413

Vishay Siliconix

www.vishay.com

S FaxBack 408-970-5600

4-8

Document Number: 70050

S-52433—Rev. D, 06-Sep-99

TEST CIRCUITS

FIGURE 6. Off Isolation

FIGURE 7. Source/Drain Capacitances

50

W

D

0V, 2.4 V

V+

–15 V

GND

V–

C

Off Isolation = 20 log

IN

+5 V

C

+15 V

S

C

D

IN

S

V+

–15 V

GND

V–

C

0 V, 2.4 V

Meter

HP4192A

Impedance

Analyzer

or Equivalent

+5 V

C

+15 V

C

C = RF Bypass

APPLICATIONS

Single Supply Operation:

The DG411/412/413 can be operated with unipolar supplies

from 5 V to 44 V. These devices are characterized and tested

for unipolar supply operation at 12 V to facilitate the majority of

is tied to 0 V.

See Input Switching Threshold vs. Supply

Summing Amplifier

When driving a high impedance, high capacitance load such

as shown in Figure

8, where the inputs to the summing

amplifier have some noise filtering, it is necessary to have

shunt switches for rapid discharge of the filter capacitor, thus

preventing offsets from occurring at the output.

+

–

DG413

FIGURE 8. Summing Amplifier