connect reference inputs for ADC

[sweethomela8]

I'm currently using an ADC with a built in 1.25 V reference and using a resistive divider (1k / 4k) to bring it down to 1 V as reference inputs to the chip (2 reference inputs). I am also using that 1V reference as an input to another chip.

The input resistance for each of the 2 ADC reference inputs are 9k.

The input resistance for the second chip is 200k.

Will this design work?

 

[bobcat1]

Hi

The answer is depend on the current source capability of the reference you use
see data sheet for this parameter

You need to drive 200K|| 9K = 8.6K for 1.25V the current is 146uA (minimum)
see the data sheet to learn whether the reference can drive this load

All the best

Bobi