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Maxim Integrated Products
Maxim Integrated Products

MAXQ3180 Datasheet

Polyphase AFE


MAXQ3180 Datasheet Preview


Rev 0; 2/08
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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.
________________________________________________________________ Maxim Integrated Products 1
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.
Page 1

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Low-Power, Multifunction, Polyphase AFE
ABSOLUTE MAXIMUM RATINGS
Voltage Range on DVDD Relative to DGND .........-0.3V to +4.0V
Voltage Range on AVDD Relative to AGND..........-0.3V to +4.0V
Voltage Range on AGND Relative to DGND ..........0.3V to +0.3V
Voltage Range on AVDD Relative to DVDD ..........-0.3V to +0.3V
Voltage Range on Any Pin Relative to
GND or AGND ...................................................-0.3V to +4.0V
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Soldering Temperature .............................Refer to the IPC/
JEDEC J-STD-020 Specification.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
METERING SPECIFICATIONS
(AVDD = DVDD = VRST to 3.6V, Current Channel Dynamic Range 1000:1 at TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Active Energy Error
Reactive Energy Error
Apparent Energy Error
RMS Voltage Error
RMS Current Error
Line Frequency Error
Power Factor Error
Active Energy Error with Harmonic
Components
DR 1000:1
DR 1000:1
DR 1000:1
DR 20:1
DR 500:1
CONDITIONS
(Note 2)
MIN TYP MAX
0.1
0.2
0.5
0.5
0.5
0.5
0.5
0.1
UNITS
%
%
%
%
%
%
%
%
ELECTRICAL CHARACTERISTICS
(AVDD = DVDD = VRST to 3.6V, TA = -40°C to +85°C, unless otherwise noted.) (Note 3)
PARAMETER
SYMBOL
POWER-SUPPLY SPECIFICATIONS
Digital Supply Voltage
DVDD
Power-Fail Interrupt Trip Point
Power-Fail Reset Trip Point
VPFW
VRST
Analog Supply Voltage
AVDD
Analog Supply Current
IAVDD
Digital Supply Current
IDVDD
Low-Power Measurement Mode
Current
ILPMM
CONDITIONS
Active mode, EPWRF = 1
Active mode
fCLK = 8MHz
fCLK = 8MHz
LOWPM = 1 (Note 1)
MIN TYP MAX UNITS
VRST
2.84
2.70
VRST
1.1
9.0
3
3.6
3.13
2.99
3.6
1.8
14
V
V
V
V
mA
mA
mA
2 _______________________________________________________________________________________
Page 2

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Low-Power, Multifunction, Polyphase AFE
ELECTRICAL CHARACTERISTICS (continued)
(AVDD = DVDD = VRST to 3.6V, TA = -40°C to +85°C, unless otherwise noted.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
DIGITAL I/O SPECIFICATIONS
Input High Voltage
VIH
Input Low Voltage
VIL
Input Hysteresis
Input Leakage
Input Low Current
RESET Pullup Resistance
VIHYS
IL
IIL
RRESET
DVDD = 3.3V
VIN = GND or DVDD, pullup off
VIN = 0.4V, weak pullup on
Output High Voltage (Except
RESET)
VOH
IOH = -4mA
IOH = -6mA
Output Low Voltage
VOL
SYSTEM CLOCK SOURCES
External Clock Input Frequency
External Clock Input Duty Cycle
External HF Crystal Frequency
XTAL1, XTAL2 Load
Capacitance
Internal RC Oscillator Frequency
Internal RC Oscillator Drift
Internal RC Oscillator Current
ANALOG-TO-DIGITAL CONVERTER
Input Voltage Range
Offset Error
Offset Error Drift
Gain Error
Total Harmonic Distortion
THD
Input Capacitance Differential
Input Bandwidth (-3dB)
INTERNAL VOLTAGE REFERENCE
Temperature Coefficient
Output Voltage
INTERNAL TEMPERATURE SENSOR
Temperature Error
IOL = 4mA
IOL = 6mA
Fundamental mode
Input sine wave f = 1kHz
(Note 1)
(Note 1)
(Note 1)
(Note 1)
MIN TYP MAX UNITS
0.7 x
DVDD
-40
27
DVDD -
0.4
DVDD -
0.5
550
±0.01
32
0.3 x
DVDD
±1
36
0.4
0.5
V
V
mV
μA
μA
k
V
V
0 8.12 MHz
45 55 %
1.00 8.12 MHz
30 pF
7.4 8.0 8.6 MHz
250 ppm/°C
50 120 μA
02
±2
±8
0.025
80
32
7
V
mV
μV/°C
%
dB
pF
kHz
30
2.048
ppm/°C
V
-4 +4 °C
_______________________________________________________________________________________ 3
Page 3
Part Number MAXQ3180
Manufactur Maxim Integrated Products
Description Polyphase AFE
Total Page 30 Pages
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