Metering Functions

• Equipped with three channels of Σ-Δ ADC.

• Active energy error less than 0.1% within 8000:1 dynamic range, compliant with IEC62053-22:2003 standard.

• Reactive energy error less than 0.1% within 8000:1 dynamic range, compliant with IEC62053-23:2003 standard.

• Provides RMS measurement for two current channels and one voltage channel; RMS error less than 0.1% within 1000:1 dynamic range.

• Integrated one pulse frequency generator for energy accumulation and integration of user-defined power.

• Outputs instantaneous sampling values of three ADC channels.

• Adjustable creep threshold.

• Reverse power indication supported.

• Voltage channel frequency measurement available.

• Voltage channel zero-crossing detection supported.

• Internal reference voltage monitoring function built-in.

Software Meter Calibration

• Adjustable meter constant (HFConst).

• Supports gain and phase correction.

• Provides offset calibration for active energy, reactive energy and RMS value.

• Accelerated calibration function for small signal metering.

• Automatic verification function for configuration parameters.

Peripherals & Features

• Built-in UART communication interface.

• Integrated power supply monitoring function.

• Timed freezing function for energy registers.

• UART RX pin multiplexed with pin reset function.

• Operating supply: +5V / 3.3V; typical power consumption: 15mW@5V, 8mW@3.3V.

• Internal 1.25V±1% reference voltage; typical temperature coefficient 5ppm/℃, maximum 15ppm/℃.

• Green SOP16L package.

Comprehensive Functions

• Measures active power, reactive power, active energy and reactive energy; provides two independent active power and RMS values, voltage RMS, line frequency, zero-crossing interrupt and other signals, enabling flexible anti-tampering solution implementation.

• Supports fully digital correction for gain, phase and offset. Active energy pulse output via PF pin; reactive energy pulse or user-defined energy pulse frequency output via QF pin.

• UART serial interface with fixed baud rate 4800; pin reset function multiplexed with UART RX pin.

• Internal power monitoring circuit ensures reliable chip operation during power-up and power-down.