• AD7949 temperature drift

    Hi team,

    we are using external ADC AD7949 for one of our project

    we need technical support regarding External ADC AD7949 temperature drift Find the below query and provide your inputs at the earliest.

    • How to derive the temperature compensation equation…
  • AD7949

    Hi Team, 

    Need one confirmation for AD7949, is the exposed pad MUST be soldered? Customer would like to skip this soldering during prototype, is it ok?


    Refer to page 9

    21 (EPAD) Exposed Pad (EPAD) NC The exposed pad is not connected internally. For increased…

  • AD7949

    Hi ,

    I have a question here. I am currently using the AD7949 adc chip and interfacing with my FPGA. I would like to know what is the Rise time and Fall time for this AD7949 chip. I am unable to find it on the data sheet.

  • AD7949 occasional invalid samples


    I am working on a system that uses 5 AD7949s connected to a single SPI bus, clock running at 16MHz. When reading the ADCs, we are using the RAC (read after conversion) method to return samples.

    Our sample rate is very low; only 50Hz. The clock was…

  • AD7949 Datasheet

    The AD7949 datasheet shows several SPI timing diagrams labeled as RDC, RAC, RSC.  Can anybody tell me what these abbreviations mean?  Thanks - George

  • AD7949 input configurations

    In the datasheet page 19 (input configurations) we see in figure 29-A the
    single ended inputs are reference to ground and COM pin is NC. In our board we
    connected the COM pin to ground but configured the DC to single ended. Is it
  • AD7949 Data sheet

    Greetings all.

    Page 22 of the data sheet (Rev F) states: "However, due to the possibility of performance degradation, digital activity should occur only prior to the safe data reading/ writing time, tDATA, because the AD7949 provides error correction…

  • AD7949 temperature measurement

    I've designed in a couple of AD7949 ADCs. In a typical 20-25C environment my boards give values that translate to temperatures in the range of 5C. The fact that they are all low makes me wonder if my calculation is wrong, but it looks fine. The parts…

  • AD7949 SDO error


    I have one problem with AD7949.

    Please refer the attached.

    Regarding SDO_NG sheet, after Power up, I have control in accordance with a sequence that is specified on the datasheet, but SDO does not go out. It works the same even after the 4th c…

  • AD7949 command set



    I am planning to use this ADC to replace a TI ADC but I cant seem to find programming information in data sheet, i.e the commands to send over SPI. Any ADI engineer able to help?

    Thank you