Other Parts Discussed in Thread: OPA847, OPA388
Hi Team,
I am design a small signal amplifier that input down to 1uV and amplifier it to MCU ADC sampling. (Input range from 1uV to 100mV, low frequency signal)
After the prevision LAB learning, i calculate the noise possible introduced as below. We use the OPA2313 as voltage follower in first stage.
1. In this voltage follower design, as gain is #1, when calculating bandwidth, i use the GBP bandwidth 1MHz.
2. I calculate the noise to 32uV;
////*** Process ***////
Now the questions coming:
1. Am i right in calculation?
2. If i choose the OPA847, a much low noise amplifier, BUT it have much higher bandwidth, which would introduce more noise. What i should handle in this case?
Thanks!