INA290: Spice model needs IN+ to be > VS by at least 0.1V for proper operation

Edward Ouellette

Part Number: INA290

INA290A1 Spice model needs IN+ to be > VS by at least 0.1V for proper operation. The model does not work when IN+ == VS (the output drifts around 300 uV regardless of differential input).
The INA290A1 datasheet clearly states on p.4, section 7.3 that IN+ (Vcm) can be >= VS. In other words, the model should work when IN+ == VS.

Thanks,

Ed Ouellette

over 3 years ago

0 Peter Iliya over 3 years ago

TI__Mastermind 26710 points

Hey Edward,

You are correct. The device will work with a VCM < Vs according to section 7.3. The model does not currently reflect this as VCM must be > Vs for the model to work properly. We are working on a new model revision. We apologize for any inconvenience.

Sincerely,

Peter

0 Edward Ouellette over 3 years ago in reply to Peter Iliya

Prodigy 100 points

Hi Peter,

Thanks for your fast reply.

I look forward to trying the new model when it's ready.

Thanks,

Amplifiers

Amplifiers forum

INA290: Spice model needs IN+ to be > VS by at least 0.1V for proper operation