MMC2107 - Freescale Semiconductor

Freescale Semiconductor, Inc.
Queued Analog-to-Digital Converter (QADC)
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Freescale Semiconductor, I
ANALOG SIGNAL SOURCE
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R Source 2
R Source 2
FILTERING AND
INTERCONNECT
R Filter 2
0.01 mF 1
C Source
C Filter
R Source 2 R Filter 2
0.01 mF 1
C Source
C Filter
R Source 2 R Filter 2
0.01 mF 1
C Source
C Filter
C Filter
TYPICAL MUX CHIP
(MC54HC4051, MC74HC4051,
MC54HC4052, MC74HC4052,
MC54HC4053, ETC.)
C MUXIN
C MUXIN
C MUXIN
R MUXOUT
C MUXOUT
C Source
C Filter C MUXIN
R Filter 2
0.01 mF 1
0.01 mF 1
R Source 2 R Filter 2
C Source
C Filter C MUXIN
0.01 mF 1
R Source 2 R Filter 2
C Source
C Filter C MUXIN
0.01 mF 1
R Source 2 R Filter 2
C Source
C Filter C MUXIN
0.01 mF 1
R Source 2 R Filter 2
C Source
C MUXIN
INTERCONNECT
C PCB
QADC
C P C SAMP
C In = C P + C SAMP
~
R Source 2
R Filter 2
C Source
0.0 1 mF 1 Notes:
C Filter 1. Typical value
2. R Filter Typically 10 KΩ–20 KΩ.
C PCB
C P
C SAMP
Figure 18-53. External Multiplexing of Analog Signal Sources
Technical Data MMC2107 – Rev. 2.0
496 Queued Analog-to-Digital Converter (QADC) MOTOROLA
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