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

♦ Compatible with 3-Phase/3-Wire, 3-Phase/4-Wire, and Other 3-Phase Services

♦ Active Power and Energy of Each Phase and Combined 3-Phase (kWh), Positive and Negative

♦ Reactive Power and Energy of Each Phase and Combined, Positive and Negative

♦ Apparent Power and Energy of Each Phase and Combined 3-Phase

♦ Neutral Line Current Measurement

♦ Line Frequency (Hz)

♦ Power Factors

♦ Voltage Phasor Angles

♦ Phase Sequence Indication

♦ Phase Voltage Absence Detection

♦ Voltage and Current Harmonic Measurement

♦ Fundamental and Total Power and Energy

♦ Two Pulse Outputs: Configurable for Active, Reactive, and Apparent Powers

♦ Programmable Pulse Widths

♦ Programmable No-Load Current Threshold

♦ Programmable Meter Constants

♦ Programmable Thresholds for Undervoltage and Overvoltage Detection

♦ Programmable Threshold for Overcurrent Detection

♦ Amp-Hours in Absence of Voltage Signals

♦ On-Chip Digital Temperature Sensor

♦ Precision Internal Voltage Reference 2.048V (30ppm/°C typical), Also Supports An External Voltage Reference

♦ 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 (35mW typical)

Applications

    3-Phase Multifunction Electricity Meters