Other Parts Discussed in Thread: OPA333, OPA211
1. I am using OPA211ID in the circuit above. It is used as voltage follower. The 0.818V at the voltage divider of 12V should appear at the output
of the op-amp. see attached document.
2. Why is the output 1.7V instead?
3. Looks like the diode at the input terminal are taking into effect.
4. If left side of R3 is above 1.67V. The output seems to follow the input.
5. Please explain this behavior.
6. If OPA211ID won’t work in this situation (for low input voltage 0.818V), can you suggest different op-amp.
7. If I replace op-amp with OPA333 the output follows the input.
8. If I use OPA333, I will plan on using 1.8V supply rail at V+ since my input never goes above 0.9V nominal.
8. Are there any concerns with 12V being present before 1.8V is present. The 12 is used to divided down using voltage divider.
