This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

  • Resolved

WEBENCH® Tools/OPA211: Something wrong with the Spice model.

Intellectual 600 points

Replies: 1

Views: 67

Part Number: OPA211

Tool/software: WEBENCH® Design Tools

Hello,

I am getting some wrong output for OPAXXX series opamps in tina. Please check out the image below.

Input is 100mV and the circuit is in voltage follower mode. But the output of OPA211 and OPA827 is wrong.

Regards

  • Hi Vishal,

    This is happening because the input common mode range for both the OPA827 and OPA211 are violated in this test case. OPA211's input common mode range extends from 1.8V above the negative supply to 1.4V below the positive supply. OPA827's common mode range extends from 3V above the negative supply to 3V below the positive supply. If you simulate the OPA827 and OPA211 using ±7.5V supplies, the expected 100mV should appear at the outputs of these two amplifiers.

    Regards,

    Alex Davis

    Precision Amplifier Applications - TI Tucson

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.