TMS570LS0432: ADC function， What is the sampled value

whong zhao

Genius 4190 points

Part Number: TMS570LS0432

Hello

Team

I use TMS570,ADC function,if the adc pin connect with nothing，What is the adc sampling value，0V?1.5V 3.3V?

Thank you

over 4 years ago

+1 QJ Wang over 4 years ago

TI__Guru**** 199146 points

Hi Whong,

The floating input pin is susceptible to electrical noise that makes the I/O randomly fluctuate between low and high. Such noise sources include thermal noise and EMI since the lead of the floating pin acts like tiny antenna.

0 whong zhao over 4 years ago in reply to QJ Wang

Genius 4190 points

Hello

The ad value I get is 1.6v.

0 QJ Wang over 4 years ago in reply to whong zhao

TI__Guru**** 199146 points

Any problem?

0 whong zhao over 4 years ago in reply to QJ Wang

Genius 4190 points

Adc pin connect with nothing，The value of acquisition is 1.6. I don’t know if it has something to do with the internal CPU.

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TMS570LS0432: ADC function， What is the sampled value