M90E25_14 Datasheet, PDF (1/57 Pages) ATMEL Corporation – Single-Phase High-Performance Wide-Span Energy

Atmel M90E25
Single-Phase High-Performance Wide-Span Energy
Metering IC
PRELIMINARY DATASHEET
FEATURES
Metering Features
• Metering features fully in compliance with the requirements of IEC62052-11 and
IEC62053-21; applicable in class 1 or class 2 single-phase watt-hour meter.
• Accuracy of 0.1% for active 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.
• 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/ apparent power, frequency, power factor and phase angle.
• Forward/ reverse active energy with independent energy registers. Active energy
can be output by pulse or read through energy registers to adapt to different appli-
cations.
• 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
system) and flexible mode (configure through register).
• Programmable L line and N line power difference threshold in anti-tampering mode.
Other Features
• 3.3V single power supply. Operating voltage range: 2.8~3.6V. Metering accuracy
guaranteed within 3.0V~3.6V. 5V compatible for digital input.
• Built-in hysteresis for power-on reset.
• Four-wire SPI interface or simplified three-wire SPI interface with fixed 24 cycles for
all registers operation
• Parameter diagnosis function and programmable interrupt output of the IRQ inter-
rupt signal and the WarnOut signal.
• Programmable voltage sag detection and zero-crossing output.
• Channel input range
- Voltage channel (when gain is '1'): 120μVrms~600mVrms.
- L line current channel (when gain is '24'): 5μVrms~25mVrms.
- N line current channel (when gain is '1'): 120μVrms~600mVrms.
• Programmable L line current gain: 1, 4, 8, 16, 24; Programmable N line gain: 1, 2, 4.
• Support L line and N line offset compensation.
• CF1 outputs active energy pulses which can be used for calibration or energy accu-
mulation.
• Crystal oscillator frequency: 8.192 MHz. On-chip 10pF capacitors and no need of
external capacitors.
• Green SSOP28 package.
• Operating temperature: -40 ℃ ~ +85 ℃ .
Atmel-46001A-SE-M90E25-Datasheet_041814