VREF=5V, AVDD=12V, AVSS=-12V
In the case of uncalibrated FI, it is found that the current error curve is not linear.
The abscissa of the figure below is: the negative maximum value to the positive maximum current value, taking a point every 2%, (a total of 101 sampling points).
The ordinate is: ERROR = (the current value between sys_force and gnd) - (the error obtained from the theoretical value).
，两端线性误差大这种情况基本上都是因为电路饱和引起的非线性失真，在排除了AD5522内部电路饱和之后，您也可以检查外部硬件电路是否发生了此类饱和，比如运放，ADC等。
