TLV2372-Q1: open loop output impedance

Hey Michael,

I believe this information is correct. It is not unheard of to have higher Zo at low frequencies. The output impedance is based on the architecture of the output stage. It is not listed in the

Usually this is because of specific reasons. For example, the OPA994 has a similar Zo which is due to the compensation scheme that is implemented that allows it to drive large capacitive loads.

Best,
Jerry

Hey Michael,

The configuration of the amplifier can introduce other factors that can influence the stability of the loop, but for a hypothetical unity-gain circuit as pictured below, there seems to be sufficient phase margin. In practice, the customer circuit will have IN+ and (IN+) shorted, and the circuitry below it will not be there, this is there just to analyze the circuit in an open-loop configuration. For more info on why this is done, please see the TI Precision Labs Video on Stability: https://www.ti.com/video/series/precision-labs/ti-precision-labs-op-amps.html?videoId=6341906518112 

TLV2370_Stability.TSC

I've provided the TINA file that I used to simulate this. If the customer circuit is implemented differently, this can be changed in the TINA file and the AC sim can be rerun.

There is no differential capacitance specified in the datasheet, so a small value was added, but it is almost certainly not correct (a guess). This will not greatly change the stability analysis in most cases.

Best,
Jerry