- support IEC 62053-21:2003, IEC 62053-22:2003 and IEC 62053-23:2003
- single 5V supply, wide range: 3.0V~5.5V
- 3 independent oversampling Σ/ΔADC
- <0.1% error in active and reactive energy over a dynamic range of 2000:1
- internal reference: 1.185V (drift 20ppm/°C)
- current input: CT, shunt resistor, or di/dt current sensor
- up to 4×15 segment LCD driver, 2 UART interfaces, 7 timers
- supply watch-dog timer
- memory: 32KB Flash, 1KB SRAM
- integrated RTC and temperature sensor, digital crystal frequency compensation for calibration and temperature variation
- power consumption in full operation: 6.6mA; downclock to 1/4 to save power
- lower power consumption when metering based on Irms or a power constant
- operating temperature: -40~+85°C
- 44 – LQFP
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