CDK5560 Cirrus Logic Inc, CDK5560 Datasheet - Page 27

• Manufacturer Part Number: CDK5560
• Description: KIT - CDB5560 W/ Capture Plus II System
• Manufacturer: Cirrus Logic Inc
• Series: CapturePLUS™IIr

Specifications of CDK5560

• Number Of Adc's: 1
• Number Of Bits: 24
• Sampling Rate (per Second): 50k
• Data Interface: Serial
• Inputs Per Adc: 1 Differential
• Input Range: ±3 V
• Power (typ) @ Conditions: 90mW @ 2.5 V
• Voltage Supply Source: Dual ±
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: CS5560
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 598-1277; CDK5560-1

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.
3.13 Synchronizing Multiple Converters
Many measurement systems have multiple converters that need to operate synchronously. The convert-
ers should all be driven from the same master clock. In this configuration, the converters will convert syn-
chronously if the same CONV signal is used to drive all the converters, and CONV falls on a falling edge
of MCLK. If CONV is held low continuously, reset (RST) can be used to synchronize multiple converters
if RST is released on a falling edge of MCLK.
DS713PP2
CONV
SW1
SW2
SW3
C1+
C2+
B1+
B2+
C1-
C2-
B1-
B2-
CH1
CH2
CH3
CH4
Convert on CH1
Select A1
Select B1
Select C1
SW2
SW3
Figure 23. More Complex Multiplexing Scheme
Convert on CH3
Select A2
Select B2
47pF
47pF
47pF
47pF
4.99k
4.99k
4.99k
4.99k
49.9
49.9
49.9
49.9
5/4/09
4700pF
4700pF
4700pF
4700pF
C0G
C0G
C0G
C0G
Convert on CH2
Select C2
Select A1
A1+
A2+
A1-
A2-
Convert on CH4
SW1
Select A2
Select B1
AIN+
AIN-
CS556x
Convert on CH1
Select A1
Select C1
CS5560
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