INA122 - Burr Brown

[Dave-L]

Hello,

Does anyone know eher I can get hold of a IN122 Instrumentation amp for multisim student version 10.1 as it is not in the list.

INA122 - Burr-Brown

Any help would be greatly appreciated!

Regards

Dave

[Fernando_D]

Hello,

You can create your own INA122 component in Multisim using the Component Wizard, here is a tutorial:

Creating a Custom Component in NI Multisim

You'll need a SPICE model to create a simulatable component, I found one here. Go to the Simulation Models section and download the INA122 PSpice Model. This zip file contains 3 files, the *.mod file is the want that you need (open this file with a text editor).

Hope this helps Dave.

Regards,

[Dave-L]

Hi Fernando,

Thanks, this is great!

Regards

Dave

[Steigede]

I have a need for a model of this amplifier too. I have downloaded the SPICE model and I attempted to make a part. Everything seems like it's ok but when I try to run it I get 0 as an output from the amplifier. I believe I set everything up right when I went throught the component wizard and I followed the steps. Any idea why it won't work? I'm not getting any errors either.

[Fernando_D]

Hello,

Attacht your component and circuit here, I'd like to do some troubleshooting. What's your Multisim version?

Regards,

[Steigede]

How do I attach my INA122 component? Can I just attach the multisim file and it will be included? Or do I need to add something separately? I am using Multisim 11.

[Fernando_D]

Hi,

Just place your custom component on the workspace, save the Multisim file and attach it here.

[Steigede]

Ok, here's the file. I named it INA because I had other INA122 parts I had already attempted to make and hadn't deleted yet. The connections I have made are for a 205 gain amplifier. I used the datasheet for the hookup. Thank you

[Fernando_D]

Hello,

The component that you created didn't recognize the SPICE model, basically you had a layout-only component (green). I found out that the problem were the last 3 lines of the SPICE model:

.ENDS INA122

*

*

I just removed these lines.

I also edited the symbol and mapped the symbol pins to the model nodes. Attached you will find the new component, right-click and select Save Component to DB and save it to your User Database.

I didn't test the component.

Hope this helps.

[Steigede]

Thank you very much! I'll give it a try!