OPA445: Inverting amplified not working

Vincent Lynch

Part Number: OPA445

Hello,

I am designing a new product using the OPA445. I have tried to simulate it using Tina but the output does not seems to be amplified. Can anyone help?

Attached is the screenshot.

Let me know if you have any questions.

Than you.

Vincent.

over 3 years ago

0 kai klaas69 over 3 years ago

Guru 140200 points

Hi Vincent,

because you short circuit the output of OPA445 with the 33R load. 0.75A would need to flow, while the specified short circuit current of OPA445 is only +/-26mA.

Kai

0 Raymond Zhang1 over 3 years ago

TI__Guru* 77521 points

Hi Vicent,

As Kai pointed out, the simulated OPA445 exceeds its current limit. The Gain = -16.5V/V, and output should be -16.5V/V * ± 0.9Vpk, if I assumed the red color is your input signal, please see the image below.

OPA445 E2E 05052022.TSC

If you have additional questions, please let us know.

Best,

Raymond

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OPA445: Inverting amplified not working