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27-72 MCF5282 User’s Manual MOTOROLA

Signal Connection Considerations

Figure 27-52. External Multiplexing of Analog Signal Sources

C

P

C

SAMP

C

P

C

SAMP

C

In

= C

P

+ C

SAMP

R

MUXOUT

R

Source

2

Analog Signal Source

Filtering and

Interconnect

Typical MUX Chip

Interconnect QADC

~

C

Filter

C

Source

R

Filter

2

C

MUXIN

0.01 µF

1

C

MUXOUT

(MC54HC4051, MC74HC4051,

MC54HC4052, MC74HC4052,

MC54HC4053, etc.)

R

Source2

C

Filter

C

Source

R

Filter

2

C

MUXIN

0.01 µF

1

R

Source

2

C

Filter

C

Source

R

Filter

2

C

MUXIN

0.01 µF

1

R

Source

2

C

Filter

C

Source

R

Filter

2

C

MUXIN

0.01 µF

1

R

Source

2

C

Filter

C

Source

R

Filter

2

C

MUXIN

0.01µF

1

R

Source

2

C

Filter

C

Source

R

Filter

2

C

MUXIN

0.01 µF

1

R

Source

2

C

Filter

C

Source

R

Filter

2

C

MUXIN

0.01 µF

1

R

Source

2

C

Filter

C

Source

R

Filter

2

C

MUXIN

0.01 µF

1

C

Filter

R

Filter

2

0.01 µF

1

1. Typical Value

2. R

Filter

, Typically 10 kΩ–20 kΩ

Notes:

R

Source

2

C

Source

C

PCB

C

PCB

~

~

~

~

~

~

~

~