DG401_09 Datasheet, PDF (11/17 Pages) Vishay Siliconix – Low-Power, High-Speed CMOS Analog Switches

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 e_in. If e_in > e_out the output of A₃
is high keeping SW₁ closed. This allows C₁ to charge up to
DG401, DG403, DG405
Vishay Siliconix
the analog input voltage. When e_in goes below e_out A₃ goes
negative, turning SW₁ off. The system will therefore store the
most positive analog input experienced.
Reset
–
e_in
+A¹
+A₃
–
SW₂
SW₁
R₁
+A₂
–
e_out
DG401
C₁
Figure 12. Positive Peak Detector
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.
Document Number: 70049
S09-2561-Rev. I, 30-Nov-09
www.vishay.com
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