MAXQ3180

Rev 0; 2/08 www.DataSheet4U.com Low-Power, Multifunction, Polyphase AFE 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. ♦ 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)...