Part Number:INA188
Daer all
I use amplifier for very low input voltage values. I work with a range from 0.4 to 20 mV. Gain = 1. I use an amplifier for amplify the current. At the lowest voltages from 0.4 to 3 mV, I see output signal is inverted. The output signal voltage is less than the input value 20 ..... 40%. After increasing the input voltage to 3 mV, the output signal becomes equal to the input signal and the inversion disappears. At the same place AMP04F from Analog Device works fine. I read the previous trades on this amplifier and understood the problems are associated with floating inputs. Tell me how to achieve the correct waveform at the output.
(Please visit the site to view this file)Best Regards