TINA/Spice/OPA322: OPA322S TINA-TI Model--The simulation results is error that i think

winx wang

Prodigy 40 points

Part Number: OPA322
Other Parts Discussed in Thread: TINA-TI,

Tool/software: TINA-TI or Spice Models

this is a simulation result of OPA322S from TINA-TI.

I think it's error that VP_10 should =VP_12=1V, and VP_9=2v which is simulation result of OPA322.

over 4 years ago

0 Tim Claycomb over 4 years ago

TI__Genius 15410 points

Hi Winx,

The maximum supply voltage of the OPA322 is 5.5V. The supply voltage in your circuit is 20V (10V - (-10V) = 20V). When I change the supply voltage of your circuit to 5V (within datasheet specifications) the circuit works properly.

Thank you,

Tim Claycomb

0 Paul Goedeke over 4 years ago in reply to Tim Claycomb

TI__Mastermind 30600 points

Tim is correct. The OPA322S model has logic which prevents operation above the abs max value in the datasheet.

Best,
Paul

0 winx wang over 4 years ago in reply to Tim Claycomb

Prodigy 40 points

thanks a lot. I had changed to 4V, but it's still wrong in OPA322S TINA-TI Model .

In additon, OPA322 TINA-TI model is right.

0 winx wang over 4 years ago in reply to Paul Goedeke

Prodigy 40 points

I had changed to 4v, its still wrong.

0 Tim Claycomb over 4 years ago in reply to winx wang

TI__Genius 15410 points

Hi Winx,

You are using an 8V supply voltage. Supply voltage is calculated as the total voltage across the device. In your case it is 4V - (-4V) = 8V. For a 5V supply, use 2.5V and -2.5V.

Thank you,

Tim Claycomb

Amplifiers

Amplifiers forum

TINA/Spice/OPA322: OPA322S TINA-TI Model--The simulation results is error that i think