INA122: cascading INA122

Francisco Tovar

Part Number: INA122

we have microfabricated some thermistors, however the gain is still in microvolts and we are using an INA122.

Would you recommend cascading another INA122 or some other amp? is the any circuit from the

" Analog Engineer’s Circuit Cookbook: Amplifiers" you can recommend?

0 Francisco Tovar over 4 years ago

sorry I meant Vout.. still in microVolts with maximum gain range

0 Raymond Zhang1 over 4 years ago

Hi Francisco,

Can you tell us about your thermistor application?

1. Temperature range and measurement accuracy

2. required gain or desired output voltage signals

3. How are you going to sense the signal --> use MCU or other means

4. what is nominal resistance at room temperature? Do you have R vs. temperature graph?

If you are able the above information, I maybe able to recommend Op Amp for the application.

Enclosed are some links about temperature measurement. If you need further assistant, please let us know.

Best,

Raymond

0 Tamara M Alani over 4 years ago in reply to Francisco Tovar

Hi Francisco,

We haven't heard from you in a while, we hope the issue was resolved. Please reply to re-open if you have any additional questions.

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