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DAC60504: VREF internal disabling before the external reference

Part Number: DAC60504
Other Parts Discussed in Thread: DAC80508

In our application, we use severals DAC60504 with external reference. If the external refernce is suppled before the disabling of the internal reference (via the register 3, bit REF-PWDWN), there is risk to damage the component ? Because of the functional diagram, the switch for the internal refrence is enabled by default :

Thank you.
Best regards,