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RTOS/SIMPLELINK-CC2640R2-SDK: Measuring battery voltage

erdem simsek
Expert 2165 points
Part Number: SIMPLELINK-CC2640R2-SDK


Tool/software: TI-RTOS

Hi,

I need to measure battery voltage precisely for a test purpose. Because of that i could not use battery monitor. It has 50mv resolution. 
I think, i need to use ADC.

How can i direct to Vcc pin to ADC pin ? Is it possible ?

What are the alternatives ?

Thanks for your attention. 

Have a nice day

  • 0
    TI__Mastermind 23636 points
    Hello erdem,

    The battery monitor has 50mV resolution, do you need more resolution than this?

    If you want to use the ADC you have a couple of options:

    1. Assuming you are operating at 3.0V, and your battery is 3.0V also then it is possible to connect ADC pin directly to the Vcc pin.

    2.Internally you can route the ADC Pin to VDDS, or VDD/DECOUPL,

    3.or you can route the ADC pin to the COMPB + and COMPB - to VDDS, VDD/DECOUPLE

    This information can be found in the technical reference manual in section 17.4.7

    Regards,
    AB