This product series is a digital display instrument IC integrated with TRMS (2KHz), LCD display driver, built-in UART, DSP, PWM port, 4-20mA passive meter and temperature controller which can achieve AC and DC voltage, AC and DC current. It supports instantaneous value and true effective value measurement. There are additional functions such as communication, alarm, transmission, and switch output. The internal integration of advanced calibration algorithms can save the customer\'s calibration time when the measurement accuracy is met. The calibration coefficients can be stored inside the chip to save external memory.