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8
Document Number: 72626
S13-1287-Rev. C, 27-May-13
Vishay Siliconix
DG444B, DG445B
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
For technical questions, contact: pmostechsupport@vishay.com
APPLICATIONS
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?72626.
Figure 8. Precision-Weighted Resistor Programmable-Gain Amplifier
+ 5 V
- 15 V
V- GND
DG444B or DG445B
+
-
V
IN
V
OUT
Gain error is determined only by the resistor
tolerance. Op amp offset and CMRR will limit ac-
curacy of circuit.
GAIN
1
A
V
= 1
GAIN
2
A
V
= 10
GAIN
3
A
V
= 20
GAIN
4
A
V
= 100
R
1
90 kΩ
R
2
5 kΩ
R
3
4 kΩ
R
4
1 kΩ
V
OUT
V
IN
=
R
1
+ R
2
+ R
3
+ R
4
R
4
= 100
With SW
4
Closed:
+ 15 V
V
L
V+
Figure 9. Precision Sample-and-Hold
- 15 V
+ 15 V
+ 15 V
15 V
30 pF
GND
DG444B
J202
J500 J507
+ 15 V
2N4400
+
-
Logic Input
Low = Sample
High = Hold
R
1
200 kΩ
C
2
1000 pF
C
1
50 pF
V
IN
V
OUT
V
1
5 MΩ
5.1 MΩ
V
2
+ 5 V
