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How do I interface to multiple AD719x ADCs over the same serial interface ?

How do I interface to multiple AD719x ADCs over the same serial interface ?

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  • Hi Mayer,

    When /CS is high on the AD719x ADCs the DOUT pin is tri-stated. This means that it is not driven. In the above configuration the decoder will only have one /CS pin low at any given time so only one ADC will be driving the DOUT line and so there will be no contention on the DOUT line. The microcontroller is controlling the decoder (not shown in diagram) and so it knows which ADC is selected at any given time.

    Regards,

    Rob

    (Editor's note:  First line said low)

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  • Hi Mayer,

    When /CS is high on the AD719x ADCs the DOUT pin is tri-stated. This means that it is not driven. In the above configuration the decoder will only have one /CS pin low at any given time so only one ADC will be driving the DOUT line and so there will be no contention on the DOUT line. The microcontroller is controlling the decoder (not shown in diagram) and so it knows which ADC is selected at any given time.

    Regards,

    Rob

    (Editor's note:  First line said low)

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