ANALOG-TO-DIGITAL CONVERTER
M68HC16 Z SERIES
8-20
USER’S MANUAL
Figure 8-9 External Multiplexing of Analog Signal Sources
~
~
~
~
~
~
~
~
CIN
CSAMPLE
CIN
CSAMPLE
C
IN
= C
IN
+ C
SAMPLE
R MUXOUT
R SOURCE
2
ANALOG SIGNAL SOURCE
FILTERING AND
INTERCONNECT
TYPICAL MUX CHIP
INTERCONNECT
ADC
ADC EXT MUX EX
~
C FILTER
C SOURCE
R FILTER
2
C MUXIN
0.1
µ
F
1
C MUXOUT
(MC54HC4051, MC74HC4051,
MC54HC4052, MC74HC4052,
MC54HC4053, ETC.)
R SOURCE
2
C FILTER
C SOURCE
R FILTER
2
C MUXIN
0.1
µ
F
1
R SOURCE
2
C FILTER
C SOURCE
R FILTER
2
C MUXIN
0.1
µ
F
1
R SOURCE
2
C FILTER
C SOURCE
R FILTER
2
C MUXIN
0.1
µ
F
1
R SOURCE
2
C FILTER
C SOURCE
R FILTER
2
C MUXIN
0.1
µ
F
1
R SOURCE
2
C FILTER
C SOURCE
R FILTER
2
C MUXIN
0.1
µ
F
1
R SOURCE
2
C FILTER
C SOURCE
R FILTER
2
C MUXIN
0.1
µ
F
1
R SOURCE
2
C FILTER
C SOURCE
R FILTER
2
C MUXIN
0.1
µ
F
1
C FILTER
R FILTER
2
0.1
µ
F
1
1. TYPICAL VALUE
2. R
FILTER
TYPICALLY 10K
Ω
–20K
Ω
.
NOTES:
R SOURCE
2
C SOURCE
F
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