Datasheet

SN74HC4851-Q1
8-CHANNEL ANALOG MULTIPLEXER/DEMUL TIPLEXER
WITH INJECTION-
CURRENT EFFECT CONTROL
SCLS554C − JANUARY 2004 − REVISED OCTOBER 2012
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
7
APPLICATION INFORMA TION
V
CC
= 5 V
I
IO
V
IN
2
< V
SS
or V
CC
< V
IN
2
Any Disabled Channel
V
SS
< V
IN
1
< V
CC
Enabled Channel
V
out
= V
I
1
V ± VΔ
out
R
S
Figure 1. Injection-Current Coupling Specification
5 V
6 V
5 V
V
CC
Sensor
’HC4051
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
V
CC
Microcontroller
(8× Identical
Circuitry)
Channel 6
Channel 7
Channel 8
Common Out
A/D − Input
Figure 2. Alternate Solution Requires 32 Passive Components and One Extra 6-V Regulator
to Suppress Injection Current Into a Standard ’HC4051 Multiplexer