Polyphase Energy Metering IC with Pulse Output ADE7752/ADE7752A ADE7752A are the same. Both products are referred to in the FEATURES text of this data sheet as ADE7752. High accuracy, supports 50 Hz/60 Hz IEC62053-2x Less than 0.1% error over a dynamic range of 500 to 1 The part specifications surpass the accuracy requirements as Compatible with 3-phase/3-wire delta and 3-phase/4-wire quoted in the IEC62053-2x standard. The only analog circuitry Wye configurations used in the ADE7752 is in the analog-to-digital converters (ADCs) The ADE7752 supplies average real power on frequency and reference circuit. All other signal processing (such as multi- outputs F1 and F2 plication, filtering, and summation) is carried out in the digital High frequency output CF is intended for calibration and domain. This approach provides superior stability and accuracy supplies instantaneous real power over extremes in environmental conditions and over time. Logic output REVP indicates a potential miswiring or negative power for each phase The ADE7752 supplies average real power information on the Direct drive for electromechanical counters and 2-phase low frequency outputs, F1 and F2. These logic outputs may be stepper motors (F1 and F2) used to directly drive an electromechanical counter or to Proprietary ADCs and DSP provide high accuracy over large interface with an MCU. The CF logic output gives instanta- variations in environmental conditions and time neous real power information. This output is intended to be On-chip power supply monitoring used for calibration purposes. On-chip creep protection (no load threshold) On-chip reference 2.4 V 8% (20 ppm/C typical) with The ADE7752 includes a power supply monitoring circuit on external overdrive capability the VDD pin. The ADE7752 remains inactive until the supply Single 5 V supply, low power voltage on VDD reaches 4 V. If the supply falls below 4 V, no 60 mW typical: ADE7752 pulses are issued on F1, F2, and CF. Internal phase matching 30 mW typical: ADE7752A circuitry ensures that the voltage and current channels are Low cost CMOS process phase matched. An internal no load threshold ensures the part does not exhibit any creep when there is no load. The ADE7752 GENERAL DESCRIPTION is available in a 24-lead SOIC package. The ADE7752 is a high accuracy polyphase electrical energy measurement IC. The ADE7752A is a pin-to-pin compatible low power version of ADE7752. The functions of ADE7752 and FUNCTIONAL BLOCK DIAGRAM V ABS DD 17 3 IAP 5 ADC X POWER IAN 6 HPF LPF SUPPLY MONITOR VAP 16 ADC PHASE ADE7752/ CORRECTION ADE7752A IBP 7 ADC X IBN 8 HPF 2 DGND LPF 15 VBP ADC 19 CLKIN PHASE CORRECTION 20 CLKOUT 9 ICP ADC X ICN 10 HPF LPF VCP 14 ADC 13 VN DIGITAL-TO-FREQUENCY CONVERTER PHASE 4k CORRECTION 2.4V REF 11 12 4 18 21 22 23 24 1 AGND REF IN/OUT REVP SCF S0 S1 F2 F1 CF Figure 1. 24-Lead Standard Small Outline Package SOIC Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. 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Trademarks and registered trademarks are the property of their respective owners. 02676-A-001ADE7752/ADE7752A TABLE OF CONTENTS Specifications..................................................................................... 3 Voltage Channels Connection .................................................. 15 Timing Characteristics..................................................................... 4 Meter Connections..................................................................... 15 Absolute Maximum Ratings............................................................ 5 Power Supply Monitor ................................................................... 17 ESD Caution.................................................................................. 5 HPF and Offset Effects .............................................................. 17 Pin Configuration and Function Descriptions............................. 6 Digital-to-Frequency Conversion ................................................ 18 Typical Performance Characteristics ............................................. 8 Mode Selection of the Sum of the Three Active Energies..... 19 Test Circuit ...................................................................................... 10 Power Measurement Considerations....................................... 19 Terminology .................................................................................... 11 Transfer Function ........................................................................... 20 Theory of Operation ...................................................................... 12 Frequency Outputs F1 and F2 .................................................. 20 Power Factor Considerations.................................................... 12 Frequency Output CF ................................................................ 21 Nonsinusoidal Voltage and Current ........................................ 13 Selecting a Frequency for an Energy Meter Application........... 22 Analog Inputs.................................................................................. 14 Frequency Outputs..................................................................... 22 Current Channels ....................................................................... 14 No Load Threshold .................................................................... 22 Voltage Channels ........................................................................ 14 Negative Power Information..................................................... 23 Typical Connection Diagrams ...................................................... 15 Outline Dimensions ....................................................................... 24 Current Channel Connection................................................... 15 Ordering Guide .......................................................................... 24 REVISION HISTORY 7/05Rev. B to Rev. C 5/03Rev. 0 to Rev. A Added ADE7752A.............................................................. Universal Changed F to F ............................................................ Universal 15 17 Changed NEGP Pin Name to REVP................................ Universal Change to Figure 6 ..........................................................................10 Changes to Table 1.............................................................................3 Changes to Frequency Outputs F1 and F2 section .....................13 Changes to Table 6, Table 7 ............................................................21 Replaced Table II .............................................................................13 Changes to Table 8, Table 9, Table 10............................................22 Changes to Examples 1, 2, and 3 ...................................................14 Updated Outline Dimensions ........................................................24 Replaced Table III............................................................................14 Changes to Ordering Guide ...........................................................24 Replaced Tables IV, V, and VI ........................................................15 Changes to SELECTING A FREQUENCY FOR AN ENERGY 9/03Rev. A to Rev. B METER APPLICATION section...................................................15 Updated Format.................................................................. Universal Changes to NO LOAD THRESHOLD section............................16 Change to Figure 19 ........................................................................15 Replaced Table VII ..........................................................................16 Rev. C Page 2 of 24