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. The MAXQ3180 performs voltage and current measurements using an integrated ADC that can measure up to seven external differential signal pairs. An eighth differential signal pair is used to measure the die temperature. An internal amplifier automatically adjusts the current channel gain to compensate for low-current channel-signal levels.
Applications 3-Phase Multifunction Electricity Meters
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)
