MAXQ3180 Datasheet, PDF (1/48 Pages) Maxim Integrated Products – Low-Power, Multifunction, Polyphase AFE

Rev 0; 2/08
Low-Power, Multifunction, Polyphase AFE
General Description
The MAXQ3180 is a dedicated electricity measurement
front-end that collects and calculates polyphase volt-
age, current, power, energy, and many other metering
and power-quality parameters of a polyphase load. The
computed 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 and
monitor the status of operations.
The MAXQ3180 performs voltage and current measure-
ments using an integrated ADC that can measure up to
seven external differential signal pairs. An eighth differ-
ential signal pair is used to measure the die tempera-
ture. An internal amplifier automatically adjusts the
current channel gain to compensate for low-current
channel-signal levels.
Applications
3-Phase Multifunction Electricity Meters
Remote Terminal Unit (RTU) Applications for
Electric Load Management
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 (IRQ) Output
♦ Single 3.3V Supply, Low Power (10mW Typical)
♦ 28-Pin TSSOP Package
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
MAXQ3180-RAN+
-40°C to +85°C
28 TSSOP
+Denotes a Pb-free/RoHS-compliant package.
MAXQ is a registered trademark of Maxim Integrated Products, Inc.
SPI is a trademark of Motorola, Inc.
Pin Configuration and Typical Application Circuit appear at
end of data sheet.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be
simultaneously available through various sales channels. For information about device errata, go to: www.maxim-ic.com/errata.
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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.