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CDB5571
2. QUICK START
Buffer Enable
Calibrate 2
Signals to ADC & Mux
4.096 V Reference
DC Supply
ADC Reset
Master/Slave SPI
ADC MCLK Out
Analog Inputs
NOTES:
1. Shaded boxes marked with "OPT. CONFIG." are not necessary for operation in an end user product.
2. Calibration function has been removed from the device but still appears on the PCB. J2 must be shorted (grounded)
for proper operation. See Appendix E for details.
Figure 2. CDB5571 Board Layout
The CDB5571 evaluation board is designed to interface with a data acquisition system. To connect and
configure the CDB5571 perform the following initialization procedure:
1. Verify that the power supplies are off.
2. Connect the power supplies to the CDB5571 as shown in Table 1 on page 6.
3. Verify that the power is off to the analog input signal & control signal sources.
4. Connect the analog input signal source to the evaluation board per Table 2 on page 6. Verify from Table 4
on page 8 that the analog input channel selected is IN_A.
5. Configure the CDB5571 by connecting the control signal sources to the evaluation board as shown in
Table 3 on page 7. Apply logic-level inputs as required to override the resistor pull-ups/pull-downs.
6. Make connections to the SPI? serial port connector as shown in Table 5 on page 8. The CS5571 ADC
serial port is configured by default to operate in the SSC (Synchronous Self Clocking) mode. Refer to the
CS5571 data sheet for more information on serial communication modes and signal timing.
7. Turn on the power supplies to the evaluation board.
8. Apply power to the signal source.
9. Press the Reset switch on the evaluation board.
10. The CS5571 ADC's SPI? serial port should now be communicating data.
DS768DB4
5
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