CDK5581 Cirrus Logic Inc, CDK5581 Datasheet - Page 26

• Manufacturer Part Number: CDK5581
• Description: KIT - CDB558 W/ Capture Plus II System
• Manufacturer: Cirrus Logic Inc
• Series: CapturePLUS™IIr

Specifications of CDK5581

• Number Of Adc's: 1
• Number Of Bits: 16
• Sampling Rate (per Second): 200k
• Data Interface: Serial
• Inputs Per Adc: 2 Single
• Input Range: ±2.048 V
• Power (typ) @ Conditions: 85mW @ 200kSPS
• Voltage Supply Source: Dual ±
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: CS5581
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 598-1574

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.
26
CONV
SW1
SW2
SW3
CH1
CH3
CH2
CH4
SW2
SW3
Convert on CH1
Select CH1
Select CH2
Select A1
Figure 22. More Complex Multiplexing Scheme
Convert on CH2
Select CH3
Select A2
150pF
150pF
90
90
3/25/08
2k
2k
14:34
4700pF
4700pF
C0G
Convert on CH3
C0G
Select CH4
Select A1
A1
A2
Convert on CH4
Select CH1
Select A2
SW1
AIN
ACOM
CS5581
Convert on CH1
Select CH2
Select A1
CS5581
DS796PP1