www.vishay.com

10

Document Number: 70051

S-71241–Rev. F, 25-Jun-07

Vishay Siliconix

DG417/418/419

APPLICATIONS

Micropower UPS Transfer Switch

rest of the circuit. Current consumption by the CMOS analog

switch is around 100 pA; this ensures that most of the power

available is applied to the memory, where it is really needed.

In the stand-by mode, hundreds of A are sufficient to retain

memory data.

When the 5 V supply comes back up, the resistor divider

senses the presence of at least 3.5 V, and causes a new

change of state in the analog switch, restoring normal

operation.

Programmable Gain Amplifier

The DG419, as shown in Figure 11, allows accurate gain

selection in a small package. Switching into virtual ground

analog signal amplitude.

GaAs FET Driver

The DG419, as shown in Figure 12 may be used as a GaAs

FET driver. It translates a TTL control signal into - 8 V, 0 V

level outputs to drive the gate.

Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon

Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and

Figure 11. Micropower UPS Circuit

GND

IN

D

V-

3 V Li Cell

Memory

DG417

(5 V)

V+

S

+

–

453 k

Ω

383 k

Ω

Figure 12. Programmable Gain Amplifier

DG419

+

-

IN

D

Figure 13. GaAs FET Driver

DG419

5 V

D

V-

GND

V+

+ 5 V

- 8 V

GaAs FET