General Description
The MAXQ3180 is a dedicated electricity measurement front-end that collects and calculates polyphase voltage, current, power, energy, and many other metering and power-quality parameters of a polyphase load. The computed results can be retrieved by an external master through the on-chip serial peripheral interface (SPI™) bus. This bus is also used by the external master to configure the operation of the MAXQ3180 and monitor the status of operations.

FEATUREs
♦ Supports IEC 60687, IEC 61036, and IEC 61268 Standards
♦ Compatible with 3-Phase/3-Wire, 3-Phase/4-Wire, and Other 3-Phase Services
♦ Calculates Active/Reactive/Apparent Energy, RMS Voltage, RMS Current, Voltage Phasor Angle, and Line Frequency
♦ Less Than 0.1% Active Energy Error Over a Dynamic Range of 1000:1 at +25°C
♦ Less Than 0.2% Reactive Energy Error Over a Dynamic Range of 1000:1 at +25°C
♦ Better Than 0.5% Accuracy for RMS Voltage and RMS Current
♦ Two Pulse Outputs: One for Active Power and One Selectable Between Reactive and Apparent Power
♦ Programmable Pulse Width
♦ Programmable Startup Current Threshold
♦ Programmable Meter Constant
♦ Up to 21st Harmonic Measurement
♦ Neutral Line Current Measurement
♦ Calculates Amp-Hours in the Absence of Voltage Signals
♦ On-Chip User-Programmable Thresholds for Line Voltage Undervoltage and Overvoltage Detection
♦ On-Chip Digital Integrator Enables Direct Interface-to-Current Sensors with di/dt Output
♦ On-Chip Digital Temperature Sensor
♦ Precision Internal Voltage Reference 2.048V (30ppm/°C Typical); Also Supports an External Voltage Reference Input
♦ Active Energy of Each Phase and Combined 3-Phase (kWh), Positive and Negative
♦ Active Power of Each Phase and Combined 3-Phase (kW)
♦ Reactive Energy of Each Phase and Combined 3-Phase (kVarh), Quadrants 1 to 4
♦ Reactive Power of Each Phase and Combined 3-Phase (kVar)
♦ Apparent Energy of Each Phase and Combined 3-Phase (kVAh)
♦ Apparent Power of Each Phase and Combined 3-Phase (kVA)
♦ Line Frequency (Hz)
♦ Power Factor
♦ Overcurrent and Overvoltage Detection
♦ Voltage Sag Detection
♦ RMS Current and RMS Voltage
♦ Line-Cycle-Wise Instant Current, Voltage, and Power
♦ Phase Sequence Error Detection
♦ Phase Voltage Absence Detection
♦ Supports Software Meter Calibration
♦ Up to 3-Point Multipoint Calibration to Compensate for Transducer Nonlinearity
♦ Power-Fail Detection
♦ Bidirectional Reset Input/Output
♦ SPI-Compatible Serial Interface with Interrupt Request (IRQ) Output
♦ Single 3.3V Supply, Low Power (10mW Typical)
♦ 28-Pin TSSOP Package

APPLICATIONs
    3-Phase Multifunction Electricity Meters
    Remote Terminal Unit (RTU) Applications for Electric Load Management