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ATT7030A
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Part Number ATT7030A
Description Active Energy Metering IC User Manual
Page 17 Pages


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High accuracy, 3-phase
active energy metering IC ATT7030A
ATT7030A User Manual
Date: 2005-03-28
Rev: 1.04
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High accuracy, 3-phase
active energy metering IC ATT7030A
Table of Contents
1 Introduction
§1.1 features……………………………………………………………….…3
§1.2 Functional description…………………………………………………4
§1.3 Block diagram……………………………………………………….…4
§1.4 Pin definition……………………………………………………………5
§1.5 Application diagram……………………………………………………8
2 System Functions
§2.1 Power supply monitor…………………………………………………9
§2.2 ADC…………………………………………………………………..…9
§2.3 Active power measure………………………………………………..10
§2.4 Active energy measure……………………………………………….10
§2.5 power direction judgement…………………………………………...11
§2.6 Voltage-depreciation detecting………………………………………11
§2.7 Hardware port detecting………………………………………………11
§2.8 Application for 3-phase 3-wire and 3-phase 4-wire………..………11
§2.9 energy pulse output…………………………………………………..12
3 Calibration
§3.1 Calibration elements..…………………………………………………14
§3.2 Design instance……………………………………………………..…15
§3.3 Reference design circuit diagram……………………………………15
4 Electrical Characteristics
§4.1 Electrical parameter……………………………………………………16
§4.2 Packaging information…………………………………………………17
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High accuracy, 3-phase
active energy metering IC ATT7030A
Chapter 1 Introduction
§1.1 Features
• High accuracy, less than 0.1% over a dynamic range of 1000 to 1;
• Active energy measure accord with 1S, 0.5S, supports IEC 687/1036, GB/T 17215-1998;
• Provide active energy measurement;
• Provide negative power indication REVP when any one phase active power is negative;
• Provide negative phase indication when 3-phase combined power is negative, which can
be used for stopping reverse situation NEGP;
• Provide phase-cut indication PA/PB/PC;
• Provide calibration pulse output for active energy: CF1;
• Provide pulse output F1/F2 for driving electromechanical counter and stepper motor;
• Selectable calculating mode for 3 phase energy combined;
• Adjustable meter constant;
• Startup current 0.1%;
• Accurate measure for active power which contain 21st harmonic;
• Provide gain and phase compensation, nonlinear compensation for little current;
• Supplies resistance network calibration;
• Compatible with 3-phase 3-wire and 3-phase 4-wire;
• Single +5V power supply;
• QFP44 package.
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High accuracy, 3-phase
active energy metering IC ATT7030A
§1.2 Functional description
ATT7030A is a high accuracy 3-phase active electronic energy metering chip which is
suitable for 3-phase 3-wire and 3-phase 4-wire.
ATT7030A incorporates 6 second-order sigma-delta ADCs, reference voltage circuitry
and the entire signal processing required calculating digital power.
ATT7030A is suitable for measuring active power; it provides phase-cut indication,
negative power indication, and negative phase indication for 3-phase combined power.
ATT7030A provides pulse output which can be used directly to calibrate error.
ATT7030A provides low frequency pulse output which can be used to drive
electromechanical counter..
ATT7030A supports resistance network calibration. The system error can be
calibrated to suffice class 1S via adjusting resistance network. The pulse for active energy
(CF1) can be connected directly to standard meter for calibration. Refer to chapter 3 for
detailed calibration method.
Power supply monitor circuitry safeguards ATT7030A’s performance.
§1.3 Block diagram
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ATT7030A datasheet pdf
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