TMS320F28335: TMS320F28335:

DEEPAK VERMA68

Part Number: TMS320F28335

For the F28335 Control CARD, is it mandatory to use separate analog and digital grounds? can't we have a common ground

over 7 years ago

0 Gautam Iyer over 7 years ago

Guru 192875 points

Hi Deepak,

Its recommended to have 2 separate grounds and is a good practice. Single/Common ground throughout would disrupt your analog signals.

Regards,
Gautam

0 Mark Labbato over 7 years ago in reply to Gautam Iyer

Guru 30330 points

Gautam is generally correct. However, this is a tradeoff between complexity, performance, and cost. If you need the absolute best analog signal integrity, yes having them separate has its benefits if implemented correctly. For a lot of applications, keeping your Voltage sources for Analog (VDDA) and digital (VDDIO) separate is enough.

I have replied similarly here: e2e.ti.com/.../750889
You can also refer to the HW design guide: http://www.ti.com/lit/spraas1

Regards,
Mark

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TMS320F28335: TMS320F28335: