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Dear *,
i tried to recreate OPA333 capacitive load 1u instabiliti in TINA-TI without success where is the problem?
1) When i use OPA333 model from the Spice Macros OpAmp and run the transient analysis i get this error:
2) i downloaded and copied the model to my design
Hi d_zero,
Your Tina model works as Kai indicated.
Please use Kai's Transient Analysis window setting (run up to 10msec and use Zero initial values) and you should see the instability or oscillation, because there is Q at approx 6.7kHz and does not have adequate phase margin (If you have a Q located at or near unity gain bandwidth, the op amp will oscillate, and this circuit demonstrate that concept).
Best,
Raymond
