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Motorola ColdFire MCF5281 User Manual

Page 603

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Queued Analog-to-Digital Converter (QADC)

Freescale Semiconductor

28-65

Figure 28-52. External Multiplexing of Analog Signal Sources

CP

CSAMP

CP

CSAMP

C

In

= C

P

+ C

SAMP

RMUXOUT

RSource

2

Analog Signal Source

Filtering and

Interconnect

Typical MUX Chip

Interconnect

QADC

~

CFilter

CSource

R

Filter

2

CMUXIN

0.01

μ

F

1

CMUXOUT

(MC54HC4051, MC74HC4051,

MC54HC4052, MC74HC4052,

MC54HC4053, etc.)

RSource2

CFilter

CSource

R

Filter

2

CMUXIN

0.01

μ

F

1

RSource

2

CFilter

CSource

R

Filter

2

CMUXIN

0.01

μ

F

1

RSource

2

CFilter

CSource

R

Filter

2

CMUXIN

0.01

μ

F

1

RSource

2

CFilter

CSource

R

Filter

2

CMUXIN

0.01

μ

F

1

RSource

2

CFilter

CSource

R

Filter

2

CMUXIN

0.01

μ

F

1

RSource

2

CFilter

CSource

RFilter

2

CMUXIN

0.01

μ

F

1

RSource

2

CFilter

CSource

R

Filter

2

CMUXIN

0.01

μ

F

1

CFilter

RFilter

2

0.01 μF

1

1. Typical Value

2. R

Filter

, Typically 10 k

Ω

–20 k

Ω

Notes:

RSource

2

CSource

CPCB

CPCB

~

~

~

~

~

~

~

~

MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3

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