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.
Key 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 (Active-Low IRQ) Output
Download
E-Mail