Document Number: 73069
S11-0179-Rev. B, 07-Feb-11
www.vishay.com
9
Vishay Siliconix
DG401B, DG403B, DG405B
APPLICATIONS
Dual Slope Integrators
The DG403B is well suited to configure a selectable slope
integrator. One control signal selects the timing capacitor C
1
or C
2
. Another one selects e
in
or discharges the capacitor in
preparation for the next integration cycle.
Band-Pass Switched Capacitor Filter
Single-pole double-throw switches are a common element
for switched capacitor networks and filters. The fast
switching times and low leakage of the DG403B allow for
higher clock rates and consequently higher filter operating
frequencies.
Figure 9. Stereo Source Selector
DG403B
Right
Right
Left
Left
Channel
Select
Source 1
Source 2
TTL
Left
Right
- 15 V
+ 15 V
GND V-
V+
S
1
IN
2
S
3
S
2
S
4
D
1
D
3
D
2
D
4
IN
1
Figure 10. Dual Slope Integrator
DG403B
Integrate/
Reset
Slope
Select
TTL
+
-
- 15 V
+ 15 V
GND V-
V+
S
1
IN
2
S
3
S
2
S
4
D
1
D
3
D
2
D
4
IN
1
C
1
C
2
e
out
e
in
Figure 11. Band-Pass Switched Capacitor Filter
- 15 V
+ 15 V
GND V-
V+
Clock
+
-
e
out
e
in
DG403B
S
1
IN
2
S
3
S
2
S
4
D
1
D
3
D
2
D
4
IN
1
