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DRV-ACC16-EVM: DRV-ACC16-EVM usage

Koji Ikeda
Expert 5325 points
Part Number: DRV-ACC16-EVM

Hello support team,

My customer inquires the following three questions, could you support?

* Application note shows "Typical Temperature Dependency (-25degC to 70degC) <3mg", what does mean? Acceleration changes 3mg from -25degC to 70degC?

*This 3mg means sensor performacne only? Or does this include external circuit influence?

*Do you have any curve of Temperature VS g?

Thanks,

Koji Ikeda

  • 0
    TI__Guru* 95085 points
    Hi Ikeda-san,

    I don't think we have temp vs g curves.
    Regarding the 3mg mention, I'll check this and come back with more information.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    TI__Expert 5325 points
    Hello Ivan-san,

    Thank you for your support, when will you give us your feedback?

    This EVM looks to use the following sensor,
    ADXL326
    www.analog.com/.../adxl326.html

    Refering Fig.11 on the manual, TEMPERATURE COEFFICIENT looks to be 3mg/degC. Is "<3mg" on DRV-ACC16-EVM application note is miss typo, correctly "< 3mg/degC"?

    Thanks,
    Koji Ikeda
  • 0 in reply to Koji Ikeda
    TI__Guru* 95085 points

    Ikeda-san,

    This has been taken from ADXL326 data as it is originally:

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators

  • 0 in reply to Ivan Salazar
    Prodigy 210 points

    Thank you Ivan-san.

    I am Shozo Ohtera of Murata MFG. in Japan.

    Originally, I asked this quesiton to Mr. Ikeda.

    Sorry to bother you, but I want to confirm this content.

    According to the specificaiton, this circuit outputs 57mV  per 1G (acceleration for gravitiy).

    Am I right?

    If so, this content meanes the error is  less than 57mV x 10^-3 = 175uV in the range of -25 to 70 celcius degrees?

    My understanding is right or not?

    Would you please let me your ideas?

    Regards,

    Shozo Ohtera

  • 0 in reply to user5875975
    TI__Guru* 95085 points
    Hi Ohtera-san,

    ADXL326 is not a TI device, and we do not support it. We cannot pronounce ourselves on its performance/behavior.
    This part was only used on a tool designed to measure the acceleration on actuators. We can only provide what is already in DRV-ACC16-EVM documentation: www.ti.com/.../slou402.pdf
    Your analysis seems to be aligned with ADXL326 data.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators