CS5581(2007) View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS5581
(Rev.:2007)

±2.5 V / 5 V, 200 kSps, 16-bit, High-throughput ∆Σ ADC

Cirrus Logic 

8/21/07

15:56

CS5581

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

1000pF

C0G

90

150pF

2k

1000pF

C0G

A1 SW1

CS5581

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 15. More Complex Multiplexing Scheme

DS796A1

25

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