Hello , I meet a problem that the measured gain is higher than expected. I use a signal generator to send a sin wave of 2mvPP ,6mvPP and 20mvPP, and this voltage is divided by serial resistors configuration as shown in the fig.The test results are shown below. I wonder whether the divider resistors are configured in the right topology. Did the bias current of INA828 cause the gain error? By the way ,the gain of the INA828 is set to 51(as the Rg is 1000Ω). There isn't any other components between the VIN+VIN- and the INA828 input.
