MAXQ3180-RAN+T

MAXQ3180-RAN+T Features

♦ Compatible with 3-Phase/3-Wire, 3-Phase/4-Wire,and Other 3-Phase Services♦ Active Power and Energy of Each Phase andCombined 3-Phase (kWh), Positive and Negative♦ Reactive Power and Energy of Each Phase andCombined, Positive and Negative♦ Apparent Power and Energy of Each Phase andCombined 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 andOvervoltage 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 ExternalVoltage Reference♦ Supports Software Meter Calibration♦ Up to 3-Point Multipoint Calibration toCompensate for Transducer Nonlinearity♦ Power-Fail Detection♦ Bidirectional Reset Input/Output♦ SPI-Compatible Serial Interface with InterruptRequest (IRQ) Output♦ Single 3.3V Supply, Low Power (35mW typical)For pricing, delivery, and ordering information,please contact Maxim Directat 1-888-629-4642,or visit Maxim’s website at www.maxim-ic.com.

MAXQ3180-RAN+T General Description

The MAXQ3180 is a dedicated electricity measurementfront-end that collects and calculates polyphase volt-age, current, power, energy, and many other meteringand power-quality parameters of a polyphase load. Thecomputed results can be retrieved by an external mas-ter through the on-chip serial peripheral interface(SPI™) bus. This bus is also used by the external mas-ter to configure the operation of the MAXQ3180 andmonitor the status of operations.The MAXQ3180 performs voltage and current measure-ments using an integrated ADC that can measure up toseven external differential signal pairs. An eighth differ-ential signal pair is used to measure the die tempera-ture. An internal amplifier automatically adjusts thecurrent channel gain to compensate for low-currentchannel-signal levels.3-Phase Multifunction Electricity Meters

MAXQ3180-RAN+T Applications