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BQ76952: Thermistor Measurement - NTC

shiva kumar
Prodigy 100 points
Part Number: BQ76952
Other Parts Discussed in Thread: TLV431

Tool/software:

BQ76952 allows you to disable the internal pull-up resistor entirely. This means the thermistor pin will not have any built-in biasing resistor, and you would need to provide an external pull-up resistor - this possible ?

U4 is TLV431 Is this voltage source and external pull up so we can measure temperature? if we use this who can do the configuration

  • +1
    TI__Genius 17945 points

    Hello Shiva,

    shiva kumar said:
    This means the thermistor pin will not have any built-in biasing resistor, and you would need to provide an external pull-up resistor - this possible


    That is correct.

    shiva kumar said:
    who can do the configuration

    You can configure them yourself on our device. You would want to go into, for example, the TS1 pin configuration register (shown in Table 13-9. TS1 Config Register Field Descriptions of the Technical Reference Manual and configure it to select ‘no pull-up (used for ADCIN functionality). Then the 0x70 TS1 Temperature() command would return a 16-bit signed value corresponding to the pin voltage in mV.

    This previous post may assist you as well.

    Best Regards,
    Alexis