DRV8885: DRV8885 RREF circuit

user5287685

Part Number: DRV8885

Is a capacitor required for the RREF pin?
①EVM has a capacitor
(2) No capacitor on the data sheet
③PFU now has capacitors

Do you recommend the motor driver side when mounting?
Which of the attached excel is better to implement?PFU_question.xlsx

over 4 years ago

0 Rick Duncan over 4 years ago

TI__Guru** 114905 points

Hi user5287685,

The EVM placed a capacitor on RREF to keep the DAC voltage stable. On the EVM changing the DAC voltage simulates changing the RREF resistor from 30k to >1MOhm.

If using a single resistor to GND as shown, there is no need to add a capacitor.

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DRV8885: DRV8885 RREF circuit