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| DG308B Datasheet, PDF (9/10 Pages) Vishay Siliconix – Improved Quad CMOS Analog Switches | |||
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APPLICATIONS
fC4
Select
TTL
Control
fC3
Select
fC2
Select
fC1
Select
C4
150 pF
C3
1500 pF
C2
0.015 μF
C1
0.15 µF
+ 15 V
V1
V- DG309B GND
R1 = 10 kΩ
R2 = 10 kΩ
- 15 V
R3 = 1 MΩ
+ 15 V
-
LM101A
- 15 V
+
30 pF
VOUT
DG308B/309B
Vishay Siliconix
160
120
80
fC1
40
fC2 fC3 fC4
0
fL1
fL2
fL3
fL4
- 40
1
10
100 1 k 10 k 100 k 1 M
Frequency â Hz
AL (Voltage Gain Below Break Frequency) =
1
fC (Break Frequency) = 2ÏR3CX
fL (Unity Gain Frequency) =
Max Attenuation =
rDS(on)
10 kΩ
1
2ÏR1CX
â - 40 dB
R3
R1 = 100 (40 dB)
Figure 8. Active Low Pass Filter with Digitally Selected Break Frequency
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 http://www.vishay.com/ppg?70047.
Document Number: 70047
S-71241âRev. F, 25-Jun-07
www.vishay.com
9
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