This product series is designed for digital display header. The IC integrated T-RMS calculator, display driver and DSP unit and it is a solution in the application of AC and DC meter. It can realize high precision measurement of industrial electrical signals such as AC and DC voltage, AC and DC current, frequency, and expansion of the alarm output function. The internal integration of advanced calibration algorithms can save the calibration time when the measurement accuracy is met. The calibration coefficients can be stored for saving external memory.