CCS/TMS320F28379D: How to connect/use ADC-D of TMS320F28379D

venkatesh gittagoni

Intellectual 260 points

Part Number: TMS320F28379D

Tool/software: Code Composer Studio

Hi,

Can anyone explain how to connect the single-ended input to ADC-D in F28379D launchpad?

over 5 years ago

0 Devin Cottier over 5 years ago

TI__Guru 60865 points

Hi Venkatesh,

These pins are connected to J21. In SW there is no particular difference between ADC-D and the other 3 ADC modules.

0 venkatesh gittagoni over 5 years ago in reply to Devin Cottier

Intellectual 260 points

Hi Devin,

Thank you for your reply. I have used ADC-A, ADC-B, and ADC-C in 12 BIT Single-ended mode only. In the same way, I want to use ADC-D, but as per launchpad schematic J21 is Differential ADC-D with 16-bit mode. So how to connect the single-ended channel to ADC-D so that I can operate it the same as ADC-A.

0 Devin Cottier over 5 years ago in reply to venkatesh gittagoni

TI__Guru 60865 points

Hi Venkatesh,

There is nothing different in the chip about ADC-D. You can use ADC-D in single-ended mode and you can use ADC-A, B, or C in differential mode.

If you want to use ADC-D to sample a single-ended signal, just hook your signal up to one of the above ADC-D pins.

There is also a differential amplifier on the board that happens to be connected to some ADC-D channels. You would use this if you have a differential signal source, for example the precision signal injector EVM: http://www.ti.com/tool/PSIEVM.

To learn more about what the different signal modes entail, have a brief read through the 'signal mode' section of the device datasheet (http://www.ti.com/document-viewer/TMS320F28377D/datasheet/signal-mode-t4738267-67#t4738267-67) and then check out these training videos from TI precision labs: https://training.ti.com/ti-precision-labs-adcs-sar-adc-input-types. The differential inputs on this device are 'fully differential'.

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CCS/TMS320F28379D: How to connect/use ADC-D of TMS320F28379D