DG444, DG445
www.vishay.com
Vishay Siliconix
S13-2503-Rev. H, 16-Dec-13
8
Document Number: 70054
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APPLICATIONS
Fig. 8 - Precision-Weighted Resistor Programmable-Gain Amplifier
Fig. 9 - Precision Sample-and-Hold
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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.
+ 5 V
- 15 V
V- GND
DG444 or DG445
+
-
V
IN
V
OUT
Gain error is determined only by the resistor
tolerance. Op amp offset and CMRR will limit
accuracy 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+
- 15 V
+ 15 V
+ 15 V
- 15 V
30 pF
GND
DG444
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 M
5.1 MΩ
V
2
+ 5 V
