ADR5045 Voltage bias for a voltage divider

Hi

I would like to measure the voltage with a voltage divider.

I would like to bias (offset, subtract) 5V with the ADR5045BKSZ-REEL7  from a 6-16V Voltage Source.

My current scheme is this:

I have calcuted that the Total current should be betwwen 75uA (6V Input) and  820uA (16v) Input. Max Voltage Output is about 3.5V, Minimum about 0.3V. (Spannungsteiler, belastet)

I have seen on another post that somebody made a similar circuit with a TL431 variable shunt regulator:

Do you agree that my solution should working?

Thank's very much for every input

Andy

Parents
  • I'm sorry. I mean ADC and not DAC. I would like to measure the voltage on the ADC from a stm32 so i need 0-3.3V Input level.

    But i think the ADP7182 need also minimum current to operate? Anyway, I have seen that ADP7182 is more than double the price so it is too expensive.

    Thank's very much

    Andy

Reply
  • I'm sorry. I mean ADC and not DAC. I would like to measure the voltage on the ADC from a stm32 so i need 0-3.3V Input level.

    But i think the ADP7182 need also minimum current to operate? Anyway, I have seen that ADP7182 is more than double the price so it is too expensive.

    Thank's very much

    Andy

Children
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