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ADS7852: Read operation

Takeshi Sasaki
Expert 4480 points
Part Number: ADS7852


Hi team,

Could you give me comment on following customer question?

Q1. Can the customer use ADS7852 for the read operation as 2 times? Or Is it have any potential issues?

As seeing previous e2e thread as below, ADS7852 operates one cycle behind the multiplexer which results in a single cycle delay. So the 2 times reading seems ok for using this device as read operation. 

https://e2e.ti.com/support/data-converters/f/73/t/639414

 Best regards,

Takeshi Sasaki

  • 0
    TI__Guru 66926 points

    Hello Sasaki-san,

    The conversion results do not need to be read two times. Normal operation involves reading the conversion immediately after the BUSY signal goes high. The customer should use the BUSY rising edge to latch the conversion data. Once BUSY returns low again, a new conversion has begun and the old data is overwritten. 

    Keep in mind that the Address bus will be set to the next sample address (n+1) while the ADC converts the previous sample (n).

    Regards,