Datasheet
SCLS542B − SEPTEMBER 2003 − REVISED JANUARY 2004
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
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
R
S
V
out
= V
I
1
V ± V∆
out
Figure 1. Injection-Current Coupling Specification
5 V
’HC4051
V
CC
Microcontroller
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Common Out
6 V
5 V
A/D − Input
V
CC
(8× Identical
Circuitry)
Sensor
Figure 2. Alternate Solution Requires 32 Passive Components and One Extra 6-V Regulator
to Suppress Injection Current Into a Standard ’HC4051 Multiplexer