90E21 Datasheet, PDF (4/57 Pages) Integrated Device Technology – Single-Phase High-Performance Wide-Span Energy Metering IC

List of Tables
Table-1 Function List ................................................................................................................................................................................................... 6
Table-2 Pin Description ............................................................................................................................................................................................. 10
Table-3 Active Energy Metering Error ....................................................................................................................................................................... 12
Table-4 Reactive Energy Metering Error ................................................................................................................................................................... 12
Table-5 Threshold Configuration for Startup and No-Load Power ............................................................................................................................ 12
Table-6 Energy Registers ......................................................................................................................................................................................... 12
Table-7 Metering Mode ............................................................................................................................................................................................. 13
Table-8 The Measurement Format ........................................................................................................................................................................... 14
Table-9 Read / Write Result in Four-Wire Mode ....................................................................................................................................................... 18
Table-10 Read / Write Result in Three-Wire Mode ..................................................................................................................................................... 18
Table-11 Register List ................................................................................................................................................................................................. 19
Table-12 SPI Timing Specification .............................................................................................................................................................................. 50
Table-13 Power On Reset Specification ..................................................................................................................................................................... 51
Table-14 Zero-Crossing Specification ......................................................................................................................................................................... 52
Table-15 Voltage Sag Specification ............................................................................................................................................................................ 52
List of Tables
4
January 10, 2012