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8
Document Number: 71402
S11-0303-Rev. C, 28-Feb-11
Vishay Siliconix
DG300B, DG301B, DG302B, DG303B
Notes:
a. Application hints are for DESIGN AID ONLY, not guaranteed and not subject to production testing.
APPLICATIONS
The DG300B series of analog switches will switch positive
analog signals while using a single positive supply. This
facilitates their use in applications where only one supply is
available. The trade-offs of using single supplies are:
1) Increased R
DS(on)
.
2) Slower switching speed. The analog voltage should not go
above or below the supply voltages which in single
operation are V+ and 0 V. (See Input Switching Threshold
vs. Positive Supply Voltage Curve.)
APPLICATIONS HINTS
a
V+
Positive Supply
Voltage
(V)
V-
Negative Supply
Voltage
(V)
GND
Voltage
(V)
V
IN
Logic Input Voltage
V
INH(min)
/V
INL(max)
(V)
V
S
or V
D
Analog Voltage
Range
(V)
15 - 15 0 4/0.8 - 15 to 15
20 - 20 0 4/0.8 - 20 to 20
15 0 0 4/0.8 0 to 15
Figure 5. Single Supply Op. Amp. Switching
+ 15 V
+ 15 V
+ 15 V
DG301B
TTL Input
+ 5 V
10 k
10 k
5 k
5 k
100 k
10 µF
50 k
V
OUT