OPA4171-Q1: OPA4171-Q1

Siddharth Sangam

Part Number: OPA4171-Q1

Hi,

I will be using OPA4171-Q1 opamp in differential amplifier mode for high voltage

inputs V.in 1= 250VDC V.in 2 = -250VDC. Need to know how to select input impedance for the same.

What should be the minimum input impedance that must be kept is there any thumb rule or etc.

Can you please provide me the app-note related to it.

with regards

Siddharth Sangam

0 kai klaas69 over 4 years ago

Guru 140200 points

Hi Siddharth,

can you show a schematic? And please tell more about your apllication.

Kai

0 Siddharth Sangam over 4 years ago in reply to kai klaas69

Hi Kai.

It is a new design which needs to be done.So, I was searching for the circuit

and design related documents for high voltage inputs.

with regards,

Siddharth Sangam

0 Tim Claycomb over 4 years ago

Hi Siddharth,

I would recommend reading "Considerations for High-Voltage Measurements" and "Voltage and current sensing in HEV/EV applications". I think "Considerations for high-voltage measurements will be the most useful in how to size the input resistors for your design.

Thank you,

Tim Claycomb

0 Siddharth Sangam over 4 years ago in reply to Tim Claycomb

Thanks Tim,

I will check the references you shared.

0 Tim Claycomb over 4 years ago in reply to Siddharth Sangam

Hi Siddharth,

I hope it is what you are looking for. Please let us know if you have any questions.

Thank you,

Tim Claycomb

Amplifiers forum