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| DG508B Datasheet, PDF (11/18 Pages) Vishay Siliconix – Precision 8-Channel/Dual 4-Channel CMOS Analog Multiplexers | |||
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TEST CIRCUITS
+ 15 V
DG508B, DG509B
Vishay Siliconix
+ 2.4 V
V+
EN
All S and Da
+5V
A0
A1
DG508B
DG509B
A2
Db, D
VO
GND
V-
50 ï
- 15 V 1 kï
35 pF
Logic
3V
Input
0V
VO
Switch
Output
VO
0V
Figure 4. Break-Before-Make Interval
50 %
tr < 20 ns
tf < 20 ns
80 %
t O PEN
Rg
Channel
Select
SX
EN
A0
A1
A2
GND
+ 15 V
V+
D
V-
- 15 V
VO
CL
1 nF
Logic 3 V
Input
OFF
ON
0V
OFF
Switch
Output
ïVO
ïVO is the measured voltage due to charge transfer
error Q, when the channel turns off.
QINJ = CL x ïVO
Figure 5. Charge Injection
V IN
VS
Rg = 50 ïï
+ 15 V
SX
V+
S8
A0
A1
A2
GND EN
D
V-
VO
RL
50 ï
- 15 V
Off Isolation = 20 log
VOUT
V IN
Figure 6. Off Isolation
+ 15 V
VIN
S1
V+
VS
SX
Rg = 50 ï
S8
A0
A1
A2
GND EN
D
V-
VO
RL
50 ï
- 15 V
Crosstalk = 20 log
VOUT
VIN
Figure 7. Crosstalk
Document Number: 64821
S10-2817-Rev. D, 20-Dec-10
www.vishay.com
11
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