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.
V9240 is a multifunction, ultralow power,
single-phase power measurement IC with UART serial interface.
3.3V power supply: 2.8V to 3.6V.
Reference: 1.210V (typical drift 10ppm/°C).
Typical power dissipation in full
operation:1.3mA.
Supporting one current channel for active
and reactive energy metering simultaneously
Highly metering accurate:
Supporting IEC 62053-21:2003, IEC62053-22:2003
and IEC 62053-23:2003;
Less than 0.1% error for active/reactive energy
metering over a dynamic range of 5000:1;
2 independent oversampling Σ/Δ ADCs: one for
voltage and one for current.
Various measurements:
DC components of voltage and current signals;
Instantaneous /average current and voltage
RMS;
Instantaneous /average active/reactive power;
Line frequency;
Phase
Auto baud rate adaption UART interface,supporting
baud rate: 1200bps~9600bps
No input crystal required.
Current input: Shunt resistor or CT
Operating temperature: -40~+85°C.
Storage temperature: -40~+125°C.
Package: 8-SOP.
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