LMP2232: Input Impedance

Jejomar Ildefonso

Part Number: LMP2232

Hi Team,

Our customer intends to use the LMP2232 as an input buffer for a high-impedance electrode. The datasheet specifies the impedance as high, but unfortunately it didn't provide discrete values. Our customer would like to know the exact range of values for its impedance. Can you help us?

Thanks in advance!

Kind Regards,

Jejomar

over 3 years ago

+1 kai klaas69 over 3 years ago

Guru 140200 points

Hi Jejomar,

estimate the gradient in the "input bias current versus common mode input voltage" plots:

Kai

+1 Raymond Zhang1 over 3 years ago

TI__Guru* 77541 points

Hi Jejomar,

Kai has estimated the input impedance of LMP2232 for electrode chemical interface. Below is the other op amp suggestions for the application, including the availability in TI store. LM7721 is a typical recommendation over the years, but we have other selections nowadays, depending on the application and operating temperature range etc..

https://www.ti.com/amplifier-circuit/op-amps/precision/products.html?login-check=true#p480=1;1&p3247max=0.02;1&sort=p2max;asc

If you have additional questions, please let us know.

Best

Raymond

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LMP2232: Input Impedance