codec ADAU1361 −12% to 14% typical input Gain Error


I use a ADAU1361 on the audio path of a radio. The value of the digitilized input signal does not match with the input measured signal. The "error" is between 0.4dB to 0.8dB, for 150mVrms/1kHz sine input (its alomst the same error with smaller or bigger signals).

Could this come from the specified typical (!) "−12% to 14% Gain Error"  of the data sheet ?

Could you explain this −12% to 14% Gain Error ?

Why is this value in the typical column ?

I can globaly measure the same error on several cards.

Best regards,

Eric R.