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Q. In AD7124-8, When single conversion mode is used, can /CS be taken high after the single conversion is initiated?
A. The serial interface is independent of the sampling process. So, once the single conversion is initiated, the AD7124-8 will power up and perform the single conversion irrespective of the /CS polarity. So, the user can take /CS low, initiate the single conversion and then take /CS high again. When the conversion is complete, /CS can be taken low to read the conversion and another single conversion can be started if required.
When /CS is taken high, the DOUT/ /RDY pin is tri-stated. Therefore, the DOUT/ /RDY pin will not indicate the end of the conversion. The user can determine the end of the conversion by reading the status register. Alternatively, the conversion time could be timed out by the microcontroller clock.