TMS320F28P650DK: Hardware design problem

Rhea Gao

Part Number: TMS320F28P650DK
Other Parts Discussed in Thread: OPA4350

Hi ,

I have a customer looking at the F28P650DK9 design data, and would like to know what is the function of 0.1R resistance in the figure below?

Thanks!

10 months ago

0 Ibukun Olumuyiwa 10 months ago

TI__Expert 8651 points

Hello Rhea,

These are snubber resistors, intended to help improve the stability of the ADC voltage reference by preventing rapid changes to the capacitor voltage.

Best regards,
Ibukun

0 Cody Watkins 10 months ago

TI__Mastermind 41675 points

This is intended to maintain stability of the operation amplifier. Historically this cap used to be even larger, however 4.7u is still a very large capacitive load for the OPA4350 to drive.

Regards,
Cody

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TMS320F28P650DK: Hardware design problem