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ADA4522 clamp circuit and

Question asked by wivern on Mar 7, 2016
Latest reply on Mar 9, 2016 by ScottH

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I have two questions about ADA4522

1. For sure.  Amplifier have input EMI filter and clamp circuit with limit the input current to ±10 mA

Should not be a problem with the situation shown in Figure?

 

2. ADA4522 have Input Bias Current 50 -150pA, 50pA make on 200k resistor drop 10uV ,

If I short V3 (left side resistors) the output voltage of AD4522 will be Voltage drop on R1+R2 (Input Bias Current) + Input voltage offset

If I measure the voltage at the output ADA4522 with short V3, for example 20uV and consequently the voltage at treal V3  (for example 1020uV) It is possible to sum of these two measurements to compensate the error amplifier ?

 

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