TMS320F28378D: tms320f28378

Lakhan Sharma

Prodigy 60 points

Part Number: TMS320F28378D

Hi,

I am trying to use Internal ADC in differential mode, but i am not able to find any example code for that.

I have configured the ADC to use in diffrential mode.

The issue is that, do i need to read data on both the pins or single pin.

over 3 years ago

0 MatthewPate over 3 years ago

TI__Guru* 77460 points

This link should take you to the portion of the DS where this is explained in more detail: https://www.ti.com/document-viewer/TMS320F28388D/datasheet/GUID-9D6489E8-91DB-4832-9455-28CC8438C50C#TITLE-SPRSP14T4738267-67

Essentially for differential mode you will supply both pins with a differential voltage that is centered about the common mode of the ADC. In this case the common mode would be VREFHI/2.

For instance a voltage on the ADCINxP = VREFHI and ADCINxN =VSSA would give an ADC result of 65535. Likewise ADCINxP = VSSA and ADCINxN = VREFHI would give an ADC result of 0. If ADCINxP = ADCINxN = VREFHI/2 then the ADC result would be mid code of 32767.

Let me know if this helps.

Best,

Matthew

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TMS320F28378D: tms320f28378