DG401 datasheet(11/17 Pages) VISHAY

Part #	DG401

Description	Low-Power, High-Speed CMOS Analog Switches

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Manufacturer	VISHAY [Vishay Siliconix]

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Document Number: 70049

S09-2561-Rev. I, 30-Nov-09

www.vishay.com

11

Vishay Siliconix

DG401, DG403, DG405

APPLICATIONS

Peak Detector:

A3 acting as a comparator provides the logic drive for

operating SW1. The output of A2 is fed back to A3 and

compared to the analog input ein. If ein > eout the output of A3

is high keeping SW1 closed. This allows C1 to charge up to

the analog input voltage. When ein goes below eout A3 goes

negative, turning SW1 off. The system will therefore store the

most positive analog input experienced.

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

reliability data, see www.vishay.com/ppg?70049.

Figure 12. Positive Peak Detector

A2

+

–

eout

+

–

A3

+

–

A1

ein

Reset

SW1

SW2

DG401

R1

C1

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