Atmel M90E32AS 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 poly- phase class 0.2S, 0.5S or class 1 watt-hour meter or class 2 var-hour meter. Accuracy of 0.1% for active energy and 0.2% for reactive energy over a dynamic range of 6000:1. Temperature coefficient is 6 ppm/ (typ.) for on-chip reference voltage. Automati- cally temperature compensated. Single-point calibration on each phase over the whole dynamic range for active energy no calibration needed for reactive/ apparent energy. 1 (typ.) temperature sensor accuracy. Flexible piece-wise non-linearity compensation: three current (RMS value)-based segments with two programmable thresholds for each phase. Independent gain and phase angle compensation for each segment. Electrical parameters measurement: less than 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 indepen- dent energy registers. Programmable startup and no-load power thresholds. 6 dedicated ADCs for phase A/B/C current and voltage sampling circuits. Current sampled over Current Transformer (CT) or Rogowski coil (di/dt coil) voltage sam- pled over resistor divider network. Programmable power modes: Normal, Idle, Detection and Partial Measurement mode. Fundamental (0.2%) and harmonic (1%) active energy with dedicated energy / power registers and independent energy outputs. Current and voltage instantaneous signal monitoring. Enhanced event detection: sag, over voltage, phase loss, over current, reverse V/I phase sequence, calculated neutral line current I over-current and frequency NC upper and lower 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. Programmable voltage sag detection and zero-crossing output. Crystal oscillator frequency: 16.384MHz. On-chip two capacitors and no need of external capacitors. Lower power consumption. I=13mA (typ.) in Normal mode. TQFP48 package. Operating temperature: -40 ~ +85 . Atmel-46003B-SE-M90E32AS-Datasheet 02122015APPLICATION Poly-phase energy meters of class 0.2S, 0.5S and class 1 which are used in three-phase four-wire (3P4W, Y0) or three-phase three-wire (3P3W, Y or ) systems. Power monitoring instruments which need to measure voltage, current, mean power, etc. GENERAL DESCRIPTION The M90E32AS is a poly-phase high performance wide-dynamic range metering IC. The M90E32AS incorporates 6 inde- pendent 2nd order sigma-delta ADCs, which could be employed in three voltage channels (phase A, B and C) and three current channels (phase A, B, C) in a typical three-phase four-wire system. The M90E32AS has an embedded DSP which executes calculation of active energy, reactive energy, apparent energy, fun- damental and harmonic active energy over ADC signal and on-chip reference voltage. The DSP also calculates measure- ment parameters such as voltage and current RMS value as well as mean active/reactive/apparent power. A four-wire SPI interface is provided between the M90E32AS and the external microcontroller. The M90E32AS is suitable for poly-phase multi-function meters which could measure active/reactive/apparent energy and fundamental/harmonic energy either through four independent energy pulse outputs CF1/CF2/CF3/CF4 or through the cor- responding registers. The ADC and auto-temperature compensation technology for reference voltage ensure the M90E32AS s long-term stability over variations in grid and ambient environment conditions. BLOCK DIAGRAM OSCI OSCO PM1 Power Mode Crystal Oscillator VDD18 Regulator PM0 Configuration Power On Reset CF1 RESET Energy Metering CF2 CF Out (Forward/Reverse Current Detector CF3 Active/Reactive/CF Generator) CF4 I1P / I1N ADC-I1 WarnOut Warn Flexible Piece-wise Non-linear DSP I2P / I2N ADC-I2 IRQ IRQ0 Compensation Out ADC-I3 I3P / I3N IRQ1 ZX0 Measure and Monitoring Zero V1P / V1N ADC-V1 ZX1 (V/I/rms / SAG / Phase / Crossing V2P / V2N ADC-V2 Frequency) ZX2 V3P / V3N ADC-V3 CS Temperature Sensor SCLK Control Logic SPI Interface SDO On-chip Vref SDI Reference Voltage Figure-1 M90E32AS Block Diagram 2 M90E32AS Datasheet Atmel-46003B-SE-M90E32AS-Datasheet 02122015