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.
poly-phase AFE, 10000:1 dynamic range, 10
ppm/°C reference
support IEC 62053-21:2003, IEC
62053-22:2003 and IEC 62053-23:2003
single 3.3V supply, wide range: 2.5V~3.6V
7 independent oversampling Σ/ΔADC
<0.1% error in active energy over a
dynamic range of 10000:1
<0.1% error in reactive energy over a
dynamic range of 5000:1
metering parameters: Irms, Vrms,
active/reactive/apparent power, active/reactive/apparent energy, line
frequency, phase, and power factor of every phase and on the overall system
internal reference: 1.185V (drift 10ppm/°C)
compensate for temperature shift in
external components
current input: CT or di/dt current sensor
SPI interfaces, in slave mode, for
communication with the MCU
SPI interfaces, in master mode, working as
DMA channels
crystal frequency: 13.1072MHz
programmable power consumption
operating temperature: -40~+85°C
44 – LQFP
Link
Download
Company
Language