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ADS1118: leakage current from CC2642 SPI

Henry Yan1
Prodigy 30 points
Part Number: ADS1118


As title

We use CC2642 connect with ADS1118.

Our system have to low power LOW power consumption when Battery solution only!

But we find it have leakage current from CC2642 SPI when M_AVDD_5V have been closed!

May I know how to do low power consumption?

attach files

  • 0
    TI__Mastermind 25598 points

    Henry,

    Section 9.4.3 in the ADS1118 data sheet covers low power operation.  In short, the power will be reduced by reduction the conversion rate.  Intput current on the device is also higher during conversion as the input RC circuit for the ADC will be switching.

    In your post you mention "M_AVDD_5V have been closed".  What do you mean by this?  Is M_AVDD_5V = open, or M_AVDD_5V = 5V?  Keep in mind that you cannot connect an input signal to the device without power applied to the supply.