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REF2033: USE Vbias for ADC reference

user6060721
Expert 1015 points
Part Number: REF2033
Other Parts Discussed in Thread: REF1933,

Hi,

I need a 1.65v voltage for ADC reference voltage.

REF2033,REF1933,REF20 can output 1.65v, but in description,1.65v is Vbias for the input bipolar signals.

Can I use Vbias for the ADC reference?

If this can,these three IC(REF2033\REF1933\REF20),which is the most recommended?

Thanks.

  • 0
    TI__Genius 10951 points

    Hi 

    Vibias has similar accuracy and drive capability as Vout pin for REF20 and REF19. You can use REF2033/REF1933 Vibias pin for 1.65V ADC reference voltage. 

    REF20 has better error budget compare to REF19 in terms of temperature accuracy and long term stability .  I'd recommend to go with REF2033 if your ADC resolution is 12 bit or more. 

    You can use below link to find out best reference for your ADC -

    https://www.ti.com/tool/ADC-TO-VREF-SELECT 

    Regards

    Trailokya