AT32F403 Series MCUs Redefine Energy Metering Precision
AT32F403 Series MCUs Redefine Energy Metering Precision
The AT32F403ARCT7 and AT32F403AVG7T metering chips now power over 2 million advanced electricity meters globally. These 32-bit ARM Cortex-M4F-based controllers achieve 0.2% active energy measurement accuracy through integrated 24-bit Σ-Δ ADCs and hardware computation engines.
A breakthrough feature is their dual-mode operation: 35μA sleep current for battery-powered gas/water meters and 1.2mA active mode for three-phase power analyzers. The chips' harmonic analysis capability (up to 63rd order) helps detect power quality issues in industrial IoT systems. Recent firmware updates added ANSI C12.18/C12.19 compliance, accelerating adoption in North American AMI deployments.
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