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MC74HC4851A_11 Datasheet, PDF (7/15 Pages) ON Semiconductor – Analog Multiplexers/Demultiplexers with Injection Current Effect Control
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MC74HC4851A, MC74HC4852A
5V
6V
5V
VCC
Sensor
(8x Identical Circuitry)
VCC
HC4051A
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Common Out
Microcontroller
A/D - Input
Figure 10. Actual Technology
Requires 32 passive components and one extra 6V regulator
to suppress injection current into a standard HC4051 multiplexer
Sensor
(8x Identical Circuitry)
5V
VCC
HC4851A
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Common Out
VCC
Microcontroller
A/D - Input
Figure 11. MC74HC4851A Solution
Solution by applying the HC4851A multiplexer
http://onsemi.com
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