In the energy metering filed, AFE (Analog Front End) chips are the digital analog mixed integrated circuits, including DAC, bandgap voltage reference, power management module, clock control module, metering calculation, and energy-pulse conversion and output functions, etc.
Single-phase AFE, low power, with UART interface
5 V power supply: 3.0 V ~ 5.5 V
Reference: 1.188 V (Typical drift 10 ppm/°C)
Typical power dissipation in full operation:1.5 mA
Highly metering accuracy:
Supporting IEC 62053-21:2003, IEC62053-22:2003 and IEC 62053-23:2003
Less than 0.1% error in active energy metering over a dynamic range of 5000:1
Less than 0.1% error in reactive energy metering over a dynamic range of 3000:1
Two independent oversampling Σ/Δ ADCs: One for voltage and one for current
Various measurements:
DC components of voltage and current signals
Total and fundamental raw/instantaneous/average current and voltage RMS
Total and fundamental raw/instantaneous/average active and reactive power
Line frequency
Supporting current detection
Supporting UART serial interface, configurable baud rate
Current input: Shunt resistor/CT
Crystal frequency: 6.5536 MHz or 3.2768 MHz
Operating temperature: -40°C ~ +85°C
Storage temperature: -40°C ~ +125°C
Package: 16-SOP
Built-in WDT
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