INA210: How to measure Gain/phase margin with INA210?

Paul Yeh

Mastermind 18115 points

Part Number: INA210

Hi team,

My customer would like to check is INA210 circuit stable or not, so they would like to do real measurement.

So could you provide guideline for customer to measure it?

I saw there is "Closed-Loop Analysis of Load-Induced Amplifier Stability Issues Using ZOUT" application note.

But there is no document to teach customer how to measure.

BTW, currently customer uses this frequency response analyzer.

Thanks

slya029.pdf

over 3 years ago

0 Guang Zhou over 3 years ago

TI__Mastermind 36740 points

Hi Paul,

Please refer to the user manual of the frequency analyzer for setup. Here is a link.

Unfortunately, there is no other document to teach customer how to measure.

Regards, Guang

0 Paul Yeh over 3 years ago in reply to Guang Zhou

TI__Mastermind 18115 points

Guang,

Thanks but could you also advise how to connect it to our EVM board.

Thanks

0 Guang Zhou over 3 years ago in reply to Paul Yeh

TI__Mastermind 36740 points

Hi Paul,

Based on my understanding, this is how I would hook up the instrument. However please verify.

Other aspects to note is to set proper oscillator amplitude, and adjust the injection resistor value if necessary. 20ohm seems to be a good starting point.

Regards, Guang

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INA210: How to measure Gain/phase margin with INA210?