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TLC0820A: What is the input impedance of the ref+/- pins?

Tony DiFonzo
Intellectual 320 points
Part Number: TLC0820A

Hi-

I am using a resistor ladder to set the analog reference levels. I want to use Hi resistor values to minimize current...

The datasheet says Rref ranges from 1.25k to 6k.

What is Rref? Is that the input impedance of the ref pins? That seems way too low.

Thanks

Tony