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TINA/Spice/DRV632EVM: Phase Margin

Part Number: DRV632EVM
Other Parts Discussed in Thread: TINA-TI, , DRV632, OPA1611

Tool/software: TINA-TI or Spice Models

Hi,

The result of an open loop analysis which is simulated with TINA-TI using DRV632EVM schematic is shown as below , it seems that the phase margin is approximately 35.2 degree.
Is it reasonable as a phase margin ?
Please let me know if there is an error in the simulation method.
In addition, the phase margin is approximately 85.5 degree if modifying R20 from 33ohm to 0ohm, so should R20 be removed ?

DRV632_Open_Loop_AC.tsc

Best regards,
Kato