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Document Number: 70050
S11-1185-Rev. G, 13-Jun-11
Vishay Siliconix
DG411, DG412, DG413
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
APPLICATIONS
Single Supply Operation:
The DG411, DG412, DG413 can be operated with unipolar
supplies from 5 V to 44 V. These devices are characterized
and tested for unipolar supply operation at 12 V to facilitate
the majority of applications. In single supply operation, V+ is
tied to V
L
and V- is tied to 0 V. See Input Switching Threshold
vs. Supply Voltage curve for V
L
versus input threshold
requirments.
Summing Amplifier
When driving a high impedance, high capacitance load such
as shown in figure 8, where the inputs to the summing
amplifier have some noise filtering, it is necessary to have
shunt switches for rapid discharge of the filter capacitor, thus
preventing offsets from occurring at the output.
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?70050
.
Figure 6. Off Isolation
R
L
50
D
0 V, 2.4 V
V+
R
g
= 50
- 15 V
GND V-
C
V
S
Off Isolation = 20 log
V
S
V
O
IN
V
L
V
O
+ 5 V
C
+ 15 V
S
C
C = RF Bypass
Figure 7. Source/Drain Capacitances
D
IN
S
V
L V+
- 15 V
GND V-
C
0 V, 2.4 V
Meter
HP4192A
Impedance
Analyzer
or Equivalent
+ 5 V
C
+ 15 V
C
Figure 8. Summing Amplifier
+
-
DG413
R
1
R
2
C
1
R
3
R
4
C
2
R
6
R
5
V
IN
1
V
IN
2
V
OUT
