Aimed at the serious nonlinear problem produced when the DAC works through wide temperature range with full scale

a nonlinear compensation method based on temperature sensors is proposed.This method measures the output of the DAC with full scale under the condition of different temperature first and separates the nonlinearity.Using bilinear interpolation algorithm

the compensation values at any condition are calculated with the temperature measured by the sensors of the system.The experimental result shows that this compensation method reduces the DAC nonlinearity effectively.