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EVAL-AD7616SDZ

Category: Hardware
Product Number: EVAL-AD7616SDZ

Hello,
I am using EVAL-AD7616 Borad and I want to change the channel which should be read. Therefore I need know in which mode the EVAL-AD7616 Board operates: Is it by default in hard or software mode?
I ask this question, because I am not able to access the HW_RNGSEL1 and HW_RNGSEL0 Pins to configure the mode of operation.
My first assumption was, that the mode of operation by default, is the hardware mode so i tried to change the channel by using the CHSEL 0, CHSEL 1 and CHSEL 2 Pins to select other channels for conversion and reading the results but that didn't work.

Thank you for your help

Kind regards

Markus



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[edited by: GenevaCooper at 9:24 PM (GMT -4) on 18 Sep 2023]

Top Replies

    •  Analog Employees 
    in reply to Markus11 +1 verified

    Hi  ,


    As per stated in its datasheet, the maximum digital input voltage (or based on your term, logic voltage) for AD7616 is only up to Vdrive + 0.3V. Please see the attached image below for your…

  • Hi  ,



    Yes. The default of EVAL-AD7616 is in the hardware mode. Links given below are its guide
    on how to configure the device:


    1) AD7616 Datasheet and Product Info | Analog Devices

    2) EVAL-AD7616 Evaluation Board | Analog Devices



    Let me know if this will help you so that I could further assist you.


    Regards,
    Jo

  • Hallo Jo,
    thank you very much for your answer.
    I have another question regarding the EVAL-AD7616:
    What is the maximum logic voltage (for example of the channel selcet pins CHSEL0,CHSEL1,CHSEL2)?
    Is it 3.3V?
    And if so, is the board permanently damaged when using a logic voltage of 5V?
    Thank you for your help.

    Kind regard

    Markus

  • Hi  ,


    As per stated in its datasheet, the maximum digital input voltage (or based on your term, logic voltage) for AD7616 is only up to Vdrive + 0.3V. Please see the attached image below for your reference. 



    Also, you can check the range for its Logic Inputs on its specification table. It is stated that for the given condition for the range of its Vdrive, 2.7 V to 3.6 V, you will be having a minimum input voltage of 2 V with a maximum voltage of 3.6V. On the other hand, if the range is 2.3 V to 2.7 V, your minimum input voltage will be 1.7 V and the maximum input voltage is 2.7 V.



    It may damage the device if the input voltage exceeds the maximum input voltage from its datasheet. So, the device will be fine as long as it is working within the range. Also, making the device work in its absolute maximum rating will not produce a guaranteed output. It may result to an unstable output. Let me know if this answer is any help to you, so that I could further assist you. 

    Regards,
    Jo