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ADA4528 offset voltage thermal stability

Question asked by Gioacchino on Jan 19, 2018
Latest reply on Jan 22, 2018 by Gioacchino


ADA4528 datasheet says that the input voltage offset has a TEMPCO of 0,015uV/°C.


How TEMPCO is measured? Is the temperature rate of change relevant?


I developed an amplifier, based on ADA4528, that exhibits higher offset voltage than expected. I know that a bad dimensioning (bad resistor choice for example) can affect the device performance. Unfortunately I cannot make my circuit public so I cannot post a picture here.


I simulated the circuit, using the ADA4528 spice model, and found a quite lower offset voltage. The simulated value is in accordance with the one I calculated.


Any suggestions?


Ragards, Gioacchino