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ADS1262: Low Power (Sleep) Mode

spanky
Expert 2710 points
Part Number: ADS1262


The proper answer to this question is to hold the RESET/PWDN pin low (as per the manual).... But I didn't anticipate wanting to put this device to sleep, so I put a pullup on the board there (i.e. always on). I'm trying to avoid running a new board and finding a free GPIO to do it the "right way".

Is there a way to put the ADS1262 into a low power sleep mode through software only? I'm also having trouble finding a spec for what the ADS1262 is supposed to draw immediately after a reset. Just upwards of 10mA... and then 25uA with the RESET/PWDN low.

Any thoughts would be greatly appreciated.

  • 0
    Expert 2710 points

    Ooops, I think I found my current leak elsewhere.

    Still, some guidance would be helpful on expected power consumption with the PWDN pin high (i.e. chip on), but a software reset and no active conversion.

  • 0 in reply to spanky
    TI__Mastermind 46915 points

    Hello spanky,

    Unfortunately, there is no software command to enter into partial power-down mode on this ADC, holding the /RESET/PWDN pin is the only way to enable the power-down, which will completely shutdown the ADC except internal LDO. There is one way to save a bit power is to turn off the unused internal circuit, for instance, disable internal voltage reference by setting INTREF bit to zero in the POWER register. Note that the IDAC and internal temperature sensor require the internal voltage reference.

    Best regards,

    Dale