Datasheet ADE7768 (Analog Devices) - 2

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ADE7768 TABLE OF CONTENTS
Specifications... 3 Power Supply Monitor ... 12 Timing Characteristics .. 4 Internal Oscillator (OSC).. 14 Absolute Maximum Ratings.. 5 Transfer Function... 14 ESD Caution.. 5 Selecting a Frequency for an Energy Meter Application .. 15 Terminology .. 6 No-Load Threshold.. 16 Pin Configuration and Function Descriptions... 7 Negative Power Information... 16 Typical Performance Characteristics ... 8 Evaluation Board and Reference Design Board ... 16 Functional Description .. 10 Outline Dimensions ... 17 Theory of Operation .. 10 Ordering Guide .. 17 Analog Inputs.. 11
Revision History 8/05—Sp0 to Rev. A
Rev. A | Page 2 of 20 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS TIMING CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ESD CAUTION TERMINOLOGY PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS FUNCTIONAL DESCRIPTION THEORY OF OPERATION Power Factor Considerations Nonsinusoidal Voltage and Current ANALOG INPUTS Channel V1 (Current Channel) Channel V2 (Voltage Channel) Typical Connection Diagrams POWER SUPPLY MONITOR HPF and Offset Effects Digital-to-Frequency Conversion Connecting to a Microcontroller for Energy Measurement Power Measurement Considerations INTERNAL OSCILLATOR (OSC) TRANSFER FUNCTION Frequency Outputs F1 and F2 Example Frequency Output CF SELECTING A FREQUENCY FOR AN ENERGY METER APPLICATION Frequency Outputs NO-LOAD THRESHOLD NEGATIVE POWER INFORMATION EVALUATION BOARD AND REFERENCE DESIGN BOARD OUTLINE DIMENSIONS ORDERING GUIDE