CS5571 View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'CS5571' PDF : 32 Pages View PDF
3/25/08
10:56
CS5571
At the same time the converter is performing a conversion on a channel from one bank of multiplexers,
the second multiplexer bank is used to select the channel for the next conversion. This configuration al-
lows the buffer amplifier for the second multiplexer bank to fully settle while a conversion is being per-
formed on the channel from the first multiplexer bank. The multiplexer on the output of the buffer amplifier
and the CONV signal can be changed at the same time in this configuration. This multiplexing architec-
ture allows for maximum multiplexing throughput from the A/D converter. The following figure depicts the
recommended analog input amplifier circuit.
CH1
CH3
SW2
CH2
CH4
SW3
90
150pF
2k
4700pF
C0G
90
150pF
2k
4700pF
C0G
A1 SW1
CS5571
AIN
A2
ACOM
CONV
SW1
SW2
SW3
Select A1
Select A2
Select A1
Select A2
Select A1
Select CH1
Select CH2
Select CH3
Select CH4
Select CH1
Select CH2
Convert on CH1 Convert on CH2 Convert on CH3 Convert on CH4 Convert on CH1
Figure 28. More Complex Multiplexing Scheme
28
DS768PP1
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