saurabh17g
Member level 2
We are using Op37 opamp to amplify the output of AD9833(frequency generator). We have built a non inverting configuration and the gain is 5(Rf=220k and Rin = 56k).
Our expectation is that this gain should be constant from 1Hz to 1MHz. But after 300Khz, we are finding getting sudden amplification and the output appears as clipped sine wave.
This behavior continues till 1MHz and we get a sine wave at 1MHz with distorted (almost triangular) shape.
GBW of Op37 = 63MHz. According to datasheet.
So theoretically,
it should give gain of 9 at 8MHz as well!
Our expectation is that this gain should be constant from 1Hz to 1MHz. But after 300Khz, we are finding getting sudden amplification and the output appears as clipped sine wave.
This behavior continues till 1MHz and we get a sine wave at 1MHz with distorted (almost triangular) shape.
GBW of Op37 = 63MHz. According to datasheet.
So theoretically,
it should give gain of 9 at 8MHz as well!