TIEVM-VIENNARECT: ADC Input Noise Issue

Vignesh M

Prodigy 75 points

Part Number: TIEVM-VIENNARECT

Tool/software:

Hi,

Part Used: TMS320F28379DPTPS

I am observing noise on the ADC input for output voltage sensing. I have attached the waveform for your reference.

Could you please confirm whether this noise could cause any issues?

Waveform: Yellow- Current R phase Green - Output Voltage Sense

Regards,

Vignesh.

5 months ago

0 Susmitha Bumadi 5 months ago

TI__Expert 3320 points

Hi Vignesh,

It's hard to tell from the image. Can you measure the noise on ADC input channel?

Please try to keep values of input signal on ADC, below to VDDA + 0.3 V during operation.

Thanks,
Susmitha

0 Vignesh M 5 months ago in reply to Susmitha Bumadi

Prodigy 75 points

Hi Susmitha,

Thanks for your reply!

Yes, I have measured the noise on the input of the ADC.

Also, the input value of the ADC does not exceed VDD.

My question is whether the noise on this pin could cause any issues.

Thanks,
Vignesh.

0 Susmitha Bumadi 5 months ago in reply to Vignesh M

TI__Expert 3320 points

Hi Vignesh,

Noise on input signal of ADC can significantly affect calculations depends on severity of noise. Noise introduces unwanted variations on input signal, causing ADC to convert values that do not accurately represent true signal. This may lead to reduced accuracy.

Thanks,
Susmitha

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TIEVM-VIENNARECT: ADC Input Noise Issue