AD620
Production
The AD620 is a low cost, high accuracy instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000. Furthermore, the...
Datasheet
AD620 on Analog.com
Hi ADI,
AD620 has specifications for allowable operating voltage range for the VREF pin - presumably for it to function properly, however it does not have specifications for absolution maximum range or range of voltages allowed when the part is powered down that the circuit must remain within in order to prevent damage or stress to the part. In my application I need to apply a reference voltage to the AD620's REF pin that not derived from the AD620's power rail and I need to understand the sort of safeguards I have to put in place as currently the REF pin could be powered while the AD620 's supply is powered down.
Please let me know if you have any questions or need further from me to answer this question.
Thanks,
Max
Hi capguy90 ,
Good day. It is stated in the "Reference Terminal" section of the datasheet that the part has an allowable voltage of 2V within the supply rail. Also, it is not recommended to power up the reference pin while the amplifier is powered down, as it can damage the part. To ensure proper operation, the part should be power up first followed by the ref pin and the inputs. Thank you.
Regards,
Gilbeys
Hi capguy90 ,
Good day. It is stated in the "Reference Terminal" section of the datasheet that the part has an allowable voltage of 2V within the supply rail. Also, it is not recommended to power up the reference pin while the amplifier is powered down, as it can damage the part. To ensure proper operation, the part should be power up first followed by the ref pin and the inputs. Thank you.
Regards,
Gilbeys
