DG444_11 Datasheet, PDF (8/12 Pages) Vishay Siliconix – Quad SPST CMOS Analog Switches

DG444, DG445
Vishay Siliconix
APPLICATIONS
V_IN
GAIN₁
A_V = 1
GAIN₂
A_V = 10
GAIN₃
A_V = 20
GAIN₄
A_V = 100
+
-
+5V
V_L
+ 15 V
V+
DG444 or DG445
V-
GND
V_OUT
Gain error is determined only by the resistor
tolerance. Op amp offset and CMRR will limit
accuracy of circuit.
R₁
90 k
R₂
5 k
R₃
4 k
With SW₄ Closed:
V_{OUT =}
V_IN
R₁ + R₂ + R₃ + R₄
R₄
= 100
R₄
1 k
- 15 V
Figure 8. Precision-Weighted Resistor Programmable-Gain Amplifier
+ 15 V
- 15 V
-
V_IN
+
5M
30 pF
5.1 M
+5V
V₁
+ 15 V
DG444
V₂
- 15 V
GND
Logic Input
Low = Sample
High = Hold
+ 15 V
C₁
50 pF
C₂
1000 pF
J202
R₁
200 k
J500
2N4400
J507
V_OUT
Figure 9. Precision Sample-and-Hold
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?70054.
www.vishay.com
Document Number: 70054
8
S11-0984-Rev. G, 23-May-11
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000