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PGA970: Power consumption

Didier COSTE
Prodigy 40 points
Part Number: PGA970

Hi!

Is there a way to put PGA970 in ultra low power comsumption (SPI ou Microcontroler mode) or standby with less than 1mA comsumption?

Thanks in advance for your answer.

Best regards.

Didier

  • 0
    TI__Mastermind 31655 points

    Hi Didier,

    The lowest power mode will involve putting the analog power into shutdown and to disable the VREF buffer (ALPWR register set to 0x01, although bit 4 may change depending on whether you are using gate drive or not). Additionally there should be no external load on AVDD, OUT, or the LVDT primary pins. Finally the internal MCU must be in reset to save power. This will still likely not be below 1mA, but it will be the lowest power state available.

    Since the MCU is in reset, an external controller will have to command the MCU to start running again through SPI or OWI. If the PGA970 does not have a digital interface connection in the final application, then placing the MCU in reset is not an option.

    Regards,