Other Parts Discussed in Thread: TLV2556
I want to supply this ADC with 5V for VCC but will be hooking it up to a microcontroller that wants 3.3V logic. I have two concerns:
My first concerns were will the ADC see a high from the microcontroller on it's SPI inputs, it looks like it should see anything about 2V as a high so that should work with a good bit of tolerance, but please correct me if I'm wrong.
My second concern was shifting the logic level down on the ADC's SPI data line out (DATA OUT) pin from 5V logic to 3.3V logic. I was planning on using a voltage divider (20K and 30K) to create a 3V high and current sink of 100uA. I was looking through the datasheet and was uncertain as to how much current the digital output pin could tolerate and if this was a good/best-practice solution. I could use a logic shifting IC but feel that may be overkill/overengineering. Will this divider work without overstressing the ADC digital output?
Thanks!