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DG506A-MIL Datasheet, PDF (8/8 Pages) Vishay Siliconix – Single 16-Ch/Differential 8-Ch CMOS Analog Multiplexers | |||
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DG506A_MIL/507A_MIL
Vishay Siliconix
APPLICATION HINTSa
V+
Positive Supply
Voltage
(V)
Vâ
Negative Supply
Voltage
(V)
VIN
Logic Input Voltage
VINH(min)/VINL(max)
(V)
VS or VD
Analog Voltage
Range
(V)
15b
â15
12
â12
10
â10
8c
â8
2.4/0.8
2.4/0.8
2.2/0.6
2.0/0.5
â15 to 15
â12 to 12
â10 to 10
â8 to 8
Notes:
a. Application Hints are for DESIGN AID ONLY, not guaranteed and not subject to production testing.
b. Electrical Parameter Chart based on V+ = 15 V, Vâ = â15 V.
c. Operation below "8 V is not recommended due to shift in VINL(MAX).
Overvoltage Protection
A very convenient form of overvoltage protection consists of
adding two small signal diodes (1N4148, 1N914 type) in series
with the supply pins (see Figure 5). This arrangement
effectively blocks the flow of reverse currents. It also floats the
supply pin above or below the normal V+ or Vâ value. In this
case the overvoltage signal actually becomes the power
supply of the IC. From the point of view of the chip, nothing has
changed, as long as the difference between VS and the Vâ rail
doesnât exceed +44 V. The addition of these diodes will reduce
the analog signal range to 1 V below V+ and 1 V above Vâ, but
it preserves the low channel resistance and low leakage
characteristics.
V+ v Vg vVâ
SX
Vg
+V
1N4148
+V
Internal
Junction
Internal
Junction
DG506A_MIL
DG507A_MIL
âV
1N4148
âV
FIGURE 5. Overvoltage Protection Using Blocking Diodes
Channel 1
Channel 2
Channel 16
D
DG506A_MIL
#1
EN
A0 A1 A2 A3
Channel 17
Channel 18
Channel 32
D
DG506A_MIL
#2
EN
A0 A1 A2 A3
A
S/H
DG419
Controller
www.vishay.com S FaxBack 408-970-5600
5-8
FIGURE 6. A 32-Channel Data Acquisition System
A/D
Data
Bus
Document Number: 70066
S-00405âRev. D, 21-Feb-00
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