Other Parts Discussed in Thread: TS321, , OPA192
Hi team,
My customer is using TS321-Q1 in buffer circuit for DC input voltage sensing. However, during every switching rising and falling edge of main DC/DC converter, TS321 output will have glitch and overshoot. Please see waveform and schematic below:
CH1 TS321 VCC (Pin 5)
CH2 Buffer_OUT (Pin 1)
CH3 Buffer_IN (Pin 3)
CH4 Main DC/DC Converter Switching Node
And we changed the op-amp from TS321 to OPA192 (keeping all surrounding components the same), this problem is gone. Could you suggest what are the op-amp spec differences may lead to this improvement?
OPA192:
CH1 TS321 VCC (Pin 5)
CH2 Buffer_OUT (Pin 1)
CH3 Buffer_IN (Pin 3)
CH4 Main DC/DC Converter Switching Node
Many thanks.
Best Regards,
Wei-Hao