DG401B_11 Datasheet, PDF (10/14 Pages) Vishay Siliconix – Low-Power, High-Speed CMOS Analog Switches

DG401B, DG403B, DG405B
Vishay Siliconix
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 e_in > e_out the output of A₃
is high keeping SW₁ closed. This allows C₁ to charge up to
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
DG401B
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?73069.
www.vishay.com
10
Document Number: 73069
S11-0179-Rev. B, 07-Feb-11