INA819: Output exception

anson zhou

Part Number: INA819

Hi Sir :

The input waveforms and peak values of the normal and abnormal modules are the same, but the peak value of the output waveform of the abnormal module is approximately three times that of the normal module, and the amplification factor is greater than the normal value, resulting in abnormal flow in the calibration mode of the module ;

Normal :

Abnorml :

2 days ago

0 Taylor Allan 1 day ago

TI__Prodigy 740 points

Hi Anson,

I'm glad to help. Could you provide a schematic or describe your test setup showing how the INA819 units are being used?

Best Regards,

Taylor Allan

0 anson zhou 22 hours ago in reply to Taylor Allan

Intellectual 365 points

Hi Allan :

SCH ,FYI !

0 Taylor Allan 19 hours ago in reply to anson zhou

TI__Prodigy 740 points

Hi Anson,

Thanks for the schematic. Could you let me know the following:

The supply voltages AVDD and -AVDD
Can you clarify the voltages/waveforms seen by the input terminals of the device?
Is there any difference in the setup/schematic between the normal and abnormal module?

If the modules are identical, have you performed an A-B-A swap to test if the issue persists when swapping out a device?

Best Regards,

Taylor Allan

0 anson zhou 10 hours ago in reply to Taylor Allan

Intellectual 365 points

Hi Allan :

1.Supply votages is 3.6V ;

2.waveforms :

3. YSE ,We have conducted ABA cross validation experiments, and the adverse phenomena follow the chip

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INA819: Output exception