Atmel M90E36A
Enhanced Poly-Phase High-Performance Wide-Span
Energy Metering IC
DATASHEET FEATURES
Metering Features Metering features fully in compliance with the requirements of IEC62052-11,
IEC62053-22 and IEC62053-23, ANSI C12.1 and ANSI C12.20; applicable in class
0.2S, 0.5S or class 1 poly-phase watt-hour meter or class 2 poly-phase var-hour
meter. Accuracy of В±0.1% for active energy and В±0.2% for reactive energy over the
dynamic range of 6000:1. Temperature coefficient is 6 ppm/ в„ѓ (typical) for on-chip reference voltage. Single-point calibration on each phase over the whole dynamic range for active
energy; no calibration needed for reactive/apparent energy. В±1 в„ѓ (typical) temperature sensor accuracy. Electrical parameters measurement: less than В±0.5% fiducial error for Vrms, Irms,
mean active/ reactive/ apparent power, frequency, power factor and phase angle. Active (forward/reverse), reactive (forward/reverse), apparent energy with independent energy registers. Active/ reactive/ apparent energy can be output by pulse or
read through energy registers to adapt to different applications. Programmable startup and no-load power threshold, special designed of startup
and no-load circuits to eliminate crosstalk among phases achieving better accuracy
especially at low power conditions. Dedicated ADC and different gains for phase A/B/C and Neutral line current sampling circuits. Current sampled over current transformer (CT) or Rogowski coil (di/dt
coil); phase A/B/C voltage sampled over resistor divider network or potential transformer (PT). Programmable power modes: Normal mode (N mode), Idle mode (I mode), Detection mode (D mode) and Partial Measurement mode (M mode). Fundamental (CF3, 0.2%) and harmonic (CF4, 1%) active energy with dedicated
energy and power registers. Total Harmonic Distortion (THD) and Discrete Fourier Transform (DFT) functions for
2 ~ 32 order harmonic component. THD and DFT results available in SPI accessible
registers. Both voltage and current of all phases processed within the same time
period. Event detection: sag, phase loss, reverse voltage/ current phase sequence, reverse
flow, calculated neutral line current INC overcurrent sampled neutral line current INS
overcurrent and THD+N over-threshold. Other Features 3.3V single power supply. Operating voltage range: 2.8V~3.6V. Metering accuracy
guaranteed within 3.0V~3.6V. Four-wire SPI interface with Direct Memory Access (DMA) mode to stream out 7channel ADC raw data. Parameter diagnosis function and programmable interrupt output of the IRQ inter-Atmel-46004B-SE-M90E36A-Dat …
