MAXQ3180_0912 Datasheet, PDF (1/101 Pages) Maxim Integrated Products – Low-Power, Multifunction, Polyphase AFE

19-4674; Rev 3; 12/09
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
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAXQ3180-RAN+ -40°C to +85°C
28 TSSOP
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration and Typical Application Circuit appear at
end of data sheet.
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
MAXQ is a registered trademark of Maxim Integrated Products, Inc.
SPI is a trademark of Motorola, Inc.
♦ Single 3.3V Supply, Low Power (35mW typical)
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.