Avago Technologies ACPL-224-500E - Manual (Page 2)

Table of Contents
Design Considerations........................................................................................................................................................................................... 1
Insulation and Regulation of Optically Coupled Isolation Devices .................................................................................. 1
Common-Mode Transient Rejection ........................................................................................................................................... 4
Dynamic CMR ...................................................................................................................................................................................... 9
Calculate the LED Lifetime Performance in Optocouplers to Predict Reliability .......................................................10
Guidelines for Printed Circuit Board Assembly and Layout ..............................................................................................14
Digital Optoisolators: An Overview ....................................................................................................................................................................15
Digital Logic Interface/Level Shifting Applications .........................................................................................................................................16
TTL Interface with Series LED Drive ...........................................................................................................................................17
Level Shifting/TTL Interface with Shunt LED Drive ..............................................................................................................18
Low Power 8 MBd CMOS Interface .............................................................................................................................................19
25 MBd CMOS Interface .................................................................................................................................................................20
Low Power 100 kBd CMOS Interface .........................................................................................................................................21
Isolated 3 V Logic Interface/Battery Operated Applications.............................................................................................22
Data Communication Applications ....................................................................................................................................................................23
Isolated RS-232C/E Interface ........................................................................................................................................................23
Isolated 3.3 V RS-232 Interface ....................................................................................................................................................24
Isolated RS-485 Bus Interface .......................................................................................................................................................25
Isolated Device Net/CAN Communication Interface ...........................................................................................................26
Isolated 4 - 20 mA Analog Current Loop Transmitter/Receiver .......................................................................................27
Isolated 20 mA Current Loop Interface ....................................................................................................................................28
Multidrop Line Receiver .................................................................................................................................................................29
Isolated Balanced Line Receiver - Circuit No. 1 ......................................................................................................................30
Isolated Balanced Line Receiver - Circuit No. 2 ......................................................................................................................32
Isolated Tri-State Line Driver.........................................................................................................................................................33
Isolated Unbalanced Line Receiver ............................................................................................................................................33
PROFIBUS/RS-422 1.5 MB/s ...........................................................................................................................................................34
Isolated PROFIBUS/RS-485 12 MB/s Communication Application .................................................................................35
Telecommunications Applications .....................................................................................................................................................................36
Telephone Ring Detection ............................................................................................................................................................36
ISDN Interface ....................................................................................................................................................................................37
Analog Applications ...........................................................................................................................................................................................38
High Speed Isolation Amplifier ...................................................................................................................................................39
Precision Isolation Amplifier for Unipolar Signals ................................................................................................................40
Isolation Amplifier for Bipolar Signals - Circuit No. 1 ...........................................................................................................41
Isolation Amplifier for Bipolar Signals - Circuit No. 2 ...........................................................................................................42
AC-Coupled Isolation Amplifier...................................................................................................................................................43
Isolated Video Interface .................................................................................................................................................................44
Inverter Design Using Gate Drive and Current Sense Optocouplers .................................................................................................................45
Motor Control Applications ................................................................................................................................................................................46
Isolated Gate Driver for IGBT/MOSFET .....................................................................................................................................50
Dual Channel Isolated Gate Driver for IGBT/MOSFET ..........................................................................................................51
Isolated Gate Driver for IGBT/MOSFET with Desaturation Protection ...........................................................................52
Isolated Interface for Intelligent Power Module Gate Drive .............................................................................................53
Low Cost Isolated Phase Current Sensing with Analog Output ......................................................................................54
Isolated A/D Converter for Phase Current Sensing ..............................................................................................................55
Low Cost Isolated Phase Current Sensing with Analog Output/Over Current Detection ......................................56
Isolated Inverter Rail Voltage Sensing using an Isolation Amplifier ...............................................................................57
Isolated Inverter Rail Voltage Sensing using a Linear Optocoupler ...............................................................................58
Low Cost Isolation Amplifier for Motor Speed and Position Measurement ................................................................59
Industrial Applications .......................................................................................................................................................................................60
AC/DC Voltage Threshold Sensing .............................................................................................................................................60
Optical Isolation in Flat-Panel Displays .....................................................................................................................................61
Power Supply Applications ................................................................................................................................................................................62
Optical Isolation in a Switching Power Supply - Circuit No. 1 ..........................................................................................62
Optical Isolation in a Switching Power Supply - Circuit No. 2 ..........................................................................................63
Optical Isolation in a DC/DC Converter ....................................................................................................................................64
Application Notes .............................................................................................................................................................................................65