Datasheet

ADE7755
Rev. A | Page 2 of 20
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Timing Characteristics ................................................................ 4
Absolute Maximum Ratings ............................................................ 5
ESD Caution .................................................................................. 5
Pin Configuration and Function Descriptions ............................. 6
Typical Performance Characteristics ............................................. 8
Terminology .................................................................................... 11
Theory of Operation ...................................................................... 12
Power Factor Considerations .................................................... 12
Nonsinusoidal Voltage and Current ........................................ 13
Analog Inputs ............................................................................. 13
Typical Connection Diagrams .................................................. 14
Power Supply Monitor ............................................................... 14
Digital-to-Frequency Conversion ............................................ 15
Interfacing the ADE7755 to a Microcontroller for Energy
Measurement ............................................................................... 16

Power Measurement Considerations ....................................... 16
Transfer Function ....................................................................... 17
Selecting a Frequency for an Energy Meter Application ...... 18
Frequency Outputs ..................................................................... 18
No Load Threshold .................................................................... 19
Outline Dimensions ....................................................................... 20
Ordering Guide .......................................................................... 20
REVISION HISTORY
8/09—Rev. 0 to Rev. A
Changes to Format ............................................................. Universal
Changes to Features Section and General Description Section . 1
Moved Figure 2 ................................................................................. 4
Changes to Pin 22, Pin 23, and Pin 24 Descriptions, Table 4 ..... 7
Changes to Terminology Section.................................................. 11
Changes to Theory of Operation Section, Figure 22, Power
Factor Considerations Section, and Figure 23 ............................ 12
Changes to Nonsinusoidal Voltage and Current Section and
Analog Inputs Section .................................................................... 13
Changes to Figure 27 ...................................................................... 14
Changes to HPF and Offset Effects Section, Figure 29, and
Digital-to-Frequency Conversion Section .................................. 15
Changes to Figure 32 ...................................................................... 16
Changes to Transfer Function Section ......................................... 17
Changes to Selecting a Frequency for an Energy Meter
Application Section ........................................................................ 18
Changes to No Load Threshold Section ...................................... 19
Updated Outline Dimensions ....................................................... 20
Changes to Ordering Guide .......................................................... 20
5/02—Revision 0: Initial Version