LMP8602Q: OFFSET pin current

Rohit J

Hi Team,

A customer wants to know what the current into the OFFSET pin is when supplied by Vs = 3.3V. Is there any impedance value for this pin?

I have asked him if he is using 'reduce gain' in case you need that information.

Thanks!

0 Rohit J over 10 years ago

Can anyone please take a look at this request?

Thanks!

0 Paul Grohe over 10 years ago

Hello Rohit,

The OFFSET input is connected to the internal gain resistors, so the input looks resistive.

Below is the equivalent internal schematic:

So the input will look like 40k resistor to ground, and may change very slightly over input common mode.

This is the reason for the warning to drive from a low impedance source. So applying 3.3V to the input pin will result in about 83uA.

Regards,

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