ADM3251E Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Package Characteristics ............................................................... 5
Regulatory Information ............................................................... 5
Insulation and Safety-Related Specifications ............................ 5
DIN EN 60747-5-2 (VDE 0884 TEIL 2): 2003-01 Insulation
Characteristics .............................................................................. 6
Absolute Maximum Ratings ............................................................ 7
ESD Caution .................................................................................. 7
Pin Configuration and Function Descriptions ............................. 8
Typical Performance Characteristics ............................................. 9
Theory of Operation ...................................................................... 11
Isolation of Power and Data ...................................................... 11
Charge Pump Voltage Converter ............................................. 12
5.0 V Logic to EIA/TIA-232E Transmitter .............................. 12
EIA/TIA-232E to 5 V Logic Receiver ...................................... 12
High Baud Rate ........................................................................... 12
Thermal Analysis ....................................................................... 12
Insulation Lifetime ..................................................................... 12
Applications Information .............................................................. 13
PCB Layout ................................................................................. 13
Example PCB for Reduced EMI ............................................... 13
DC Correctness and Magnetic Field Immunity ..................... 13
Isolated Power Supply Circuit .................................................. 14
Outline Dimensions ....................................................................... 15
Ordering Guide .......................................................................... 15
REVISION HISTORY
10/13—Rev. F to Rev. G
Added Patents Information, Note 1 ............................................... 1
Changed Minimum External Tracking (Creepage) Value to
7.6 mm, Table 5 ................................................................................. 5
Changes to Pin 9 Description and Pin 11 Descriptions, Table 8 ...... 8
Changes to Isolation of Power and Data Section ....................... 11
6/12—Rev. E to Rev. F
Changes to Endnote 1 in Table 4 .................................................... 5
Added DC Correctness and Magnetic Field Immunity
Section .............................................................................................. 13
Added Figure 22 and Figure 23; Renumbered Sequentially ..... 14
Updated Outline Dimensions and Changes to
Ordering Guide ............................................................................... 15
5/10—Rev. D to Rev. E
Changes to Features Section............................................................ 1
Changes to Table 4 ............................................................................ 5
3/10—Rev. C to Rev. D
Changes to Features and General Description Sections .............. 1
Changes to Table 4 and Table 5 ....................................................... 5
Changed DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
Insulation Characteristics (Pending) Heading to DIN EN
60747-5-2 (VDE 0884 Teil 2): 2003-01 Insulation
Characteristics ................................................................................... 6
Changes to Pollution Degree and Input–to-Output Te st Voltage
Parameters, Table 6............................................................................ 6
Added Applications Information Section and Example PCB for
Reduced EMI Section; Added Table 9 and Table 10;
Renumbered Sequentially ............................................................. 13
Changes to PCB Layout Section ................................................... 13
Added Isolated Power Supply Circuit Section, and Figure 22;
Renumbered Sequentially ............................................................. 14
1/10—Rev. B to Rev. C
Changes to Table 4 ............................................................................. 5
11/09—Rev. A to Rev. B
Changes to Figure 1 ........................................................................... 1
Changed to Primary Side Supply Input Current, I
CC(DISABLE)
Maximum Limit to 2.5 mA .............................................................. 4
Changes to Table 4 ............................................................................. 5
Changes to Figure 13 ...................................................................... 11
9/08—Rev. 0 to Rev. A
Changes to Timing Parameters in Table 1 .................................... 3
Changes to Timing Parameters in Table 2 .................................... 4
Changes to Ordering Guide .......................................................... 14
7/08—Revision 0: Initial Version
Rev. G | Page 2 of 16
