Datasheet Microchip ATM90E26 — Datenblatt

Atmel M90E26
Single-Phase High-Performance Wide-Span
Energy Metering IC
DATASHEET FEATURES
Metering Features
• Metering features fully in compliance with the requirements of IEC62052-11,
IEC62053-21 and IEC62053-23; applicable in class 1 or class 2 single-phase watthour meter or class 2 single-phase var-hour meter.
• Accuracy of 0.1% for active energy and 0.2% for reactive energy over a dynamic
range of 5000:1.
• Temperature coefficient is 15 ppm/ ℃ (typical) for on-chip reference voltage
• Single-point calibration over a dynamic range of 5000:1 for active energy; no calibration needed for reactive energy.
• Energy Meter Constant doubling at low current to save verification time.
• Electrical parameters measurement: less than ±0.5% fiducial error for Vrms, Irms,
mean active/ reactive/ apparent power, frequency, power factor and phase angle.
• Forward/ reverse active/ reactive energy with independent energy registers. Active/
reactive energy can be output by pulse or read through energy registers to adapt to
different applications.
• Programmable startup and no-load power threshold.
• Dedicated ADC and different gains for L line and N line current sampling circuits.
Current sampled over shunt resistor or current transformer (CT); voltage sampled
over resistor divider network or potential transformer (PT).
• Programmable L line and N line metering modes: anti-tampering mode (larger
power), L line mode (fixed L line), L+N mode (applicable for single-phase three-wire …