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AD7794 intead of ADUCM360

Hello 

I want use AD7794 instead of ADuCM360 in CN-0359 Circuit Note.

But I am confused about which pin configuration I should use.

I have indicaetd the ADC pins in the picture.

What should ADC[3:0] pins pole configuration be?

For example : ADC0, ADC1, ADC2, ADC3 respectively (+)(-)(+)(-)

What is the proper congfiguration for these pins?

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Nov 20, 2018 +1 verified

Hi cevdet29,

Each of the ADC channels being sent to ADuCM360 in the CN0359 are single-ended inputs.  So you'll want to send each input (ADC[0:3]) to the AIN[0:3] (+) inputs and ground the AIN[0:3] (-) inputs…

    •  Analog Employees 
    Nov 21, 2018 in reply to FormerMember +1 verified

    Hi cevdet29,

    The ADuCM360 has pseudo differential capability and can accept the 4 signals as either single ended or differential inputs. The AD7794 has fully differential inputs and what Brandon suggests…

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    • FormerMember
      +1 FormerMember
    on Nov 20, 2018 3:11 PM

    Hi cevdet29,

    Each of the ADC channels being sent to ADuCM360 in the CN0359 are single-ended inputs.  So you'll want to send each input (ADC[0:3]) to the AIN[0:3] (+) inputs and ground the AIN[0:3] (-) inputs of the AD7794 within this application.

    You'll also need to ensure that you have an excitation current available for the RTD input on the AD7794 that is available.  So you might need to ensure the RTD section of the design is set properly and then set the rest of the channels to read the analog voltages.

    Hope that helps

    Brandon

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    • FormerMember
      +1 FormerMember
    on Nov 20, 2018 3:11 PM

    Hi cevdet29,

    Each of the ADC channels being sent to ADuCM360 in the CN0359 are single-ended inputs.  So you'll want to send each input (ADC[0:3]) to the AIN[0:3] (+) inputs and ground the AIN[0:3] (-) inputs of the AD7794 within this application.

    You'll also need to ensure that you have an excitation current available for the RTD input on the AD7794 that is available.  So you might need to ensure the RTD section of the design is set properly and then set the rest of the channels to read the analog voltages.

    Hope that helps

    Brandon

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