• AD7691: Vref

    Q 

    Question on AD7691: What should be Vref to convert of the maximal number of
    bits a difference between two signals which a little from each other differ?
    For example, Vin + = 4,5V, Vin-= 4,49V.

     

    A 

    As the absolute input range max is =Vref and your…

  • AD7691: FAQ

    FAQ

  • I got some samples of the AD7691 and connected it to the SPORT of an ADSP21161N.

    Q 

    I got some samples of the AD7691 and connected it to the SPORT of an
    ADSP21161N. I found a strange behaviour of the ADC and I have no idea why. I
    connected a constant voltage to the positive input of the device (the negative
    input is grounded…

  • RE: Different specification on AD7691

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    …

  • RE: AD7691 SDO status on Power Up

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  • RE: Having difficulty in getting expected ad7691 output

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  • RE: AD7691 Pulsar Differential ADC Common Mode Input Spec

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  • RE: How can we collect datas from the AD7691 via microcontroller ?

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

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  • Problems with multiple AD7691 in 4-wire CS-mode

    I am using four AD7691 in "CS MODE, 4-WIRE WITHOUT BUSY INDICATOR", as explained on page 20 in the datasheet.

    I have problems with the SDO (data output) that should be in high impedance mode, if SDI (used as Chip Select) is high (not selected…

  • Repeated samples from AD7691

    I am currently testing the AD7691 18-bit SAR ADC. I have made a circuit with a 16-bit DAC that puts out a voltage for the AD7691 to sample. Then I programmed a micro controller to read and write bits to the DAC and ADC with SPI, and a serial port to transfer…