Part Number: THS4524
Dear all,
I am looking to perform a fully differential integrator, wit the THS4524 of TI.
Performing some simulation into TINA a got a pretty cool model of integrator. I seems to be too easy. So please, your comment and help are welcome
Hi,
As Jacob mentioned, stability of your circuit could be the primary issue for the integrator. If we do the stability analysis of your circuit, it does look like the intersection of THS4524 open loop gain curve (THS452x_Aol) with the Noise Gain curve is at -20dB/decade indicating a stable circuit. Normally, if the intersection is at > -20dB/decade (or say -40dB/decade), it is then possible that the amplifier is unstable. But, I believe this wont be the case with the integrator circuit because the THS452x is unity gain stable and the minimum Noise Gain for your circuit is essentially 1V/V or 0dB.
To learn more about the FDA stability - especially Noise Gain and Open Loop gain and how their interaction affects stability (if you are new to the FDA world), I would recommend going through the TI Precision labs video here: 
Best Regards,
Rohit
