This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

MSP430F5419A: ADC input electrical spec

Part Number: MSP430F5419A
Other Parts Discussed in Thread: TLV8801

Hi,

I use TLV8801 for ADC input buffer. I found OPA output will generate a sin wave, but if I remove the resistance between OPA and ADC, this sin wave is gone.

OPA input is voltage divider. Ru=1MOhm, Rd=1MOhm. 

If I pass OPA, connect voltage divider to ADC directly. Then I can get correct voltage!

I don't know why this result, pls help give me right answer.