Does the SCLK have to be continuous for the AD7321?
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SCLK does not need to be continuous for this device. The conversion will be framed by the /CS signal.
Thanks for the info. So the data sheet spec of 50 kHz minimum for the SCLK is only referring to when the SCLK is active?
That's correct. On this part, the SCLK is actually driving the conversion internally, so in order to keep the conversion accurate, you need to run the SCLK at 50kHz or better (up to 10MHz). As mentioned before, it can be discontinuous, as the conversion is only running between the /CS gating.
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