THS4567: Measures gain/phase characteristics

Hi Hiroaki,

I looked at the attachment you provided, but the circuit was very small and blurry so I am not able to reproduce it from that image. Would you be able to provide a clearer image or attach a schematic file if you have that? I will be able to assist further with that.

Thanks,

Nick

Hello Nick-san.

Our customer's circuit has not been publicly disclosed.
Please let me know how to measure the phase margin so that the customer can continue to evaluate.

Best Regards,
Hiroaki Yuyama

Hi Hiroaki-san,

I completely understand. Just to confirm, are you running the THS4567 in Differential TIA mode with the ICM loop enabled (ICM_EN = 2.5V)?

The following resources should help you understand how to evaluate the phase margin:

TI Precision Labs Op Amps Video Series -> This video series has a section covering stability. There is also a video covering stability of FDAs in the corresponding section

TIA Blog Series -> This blog covers stability analysis of TIA circuits

Stability Analysis Article -> This is an in-depth article covering stability analysis

Please let me know if there are still any questions.

Thanks,

Nick