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| ADI ADuM540x四路数字绝缘方案 |
| 作者： 时间：2008-08-07 来源:eaw |
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ADI 公司的ADuM540x是四路数字绝缘器,它采用ADI公司的iCoupler® 技术,集成了isoPower™绝缘的DC/DC转换器,绝缘电源可有5V或3.3V输出,可用于RS-232/RS-422/RS485收发器,工业现场总线隔离,电源起动偏压和栅极驱动以及工业PLC等.本文介绍了ADuM540x的主要特性, 功能方框图以及ADuM540x评估板主要特性,电路图和材料清单(BOM).
Quad-Channel Isolators with Integrated DC-to-DC Converter ADuM5401/ADuM5402/ADuM5403/ADuM5404
The ADuM5401/ADuM5402/ADuM5403/ADuM54041 devices are quad-channel digital isolators with isoPower™, an integrated, isolated dc-to-dc converter. Based on the Analog Devices, Inc., iCoupler® technology, the dc-to-dc converter provides up to 500 mW of regulated, isolated power at either 5.0 V from a 5.0 V input supply or 3.3 V from a 3.3 V supply. This eliminates the need for a separate, isolated dc-to-dc converter in low power, isolated designs. The iCoupler chip scale transformer technology is used to isolate the logic signals and the magnetic components of the dc-to-dc converter. The result is a small form factor, total isolation solution.
The ADuM5401/ADuM5402/ADuM5403/ADuM5404 isolators provide four independent isolation channels in a variety of channel configurations and data rates
图1.ADuM540x功能方框图
ADuM540x主要特性:
isoPower integrated, isolated dc-to-dc converter
Regulated 3.3 V or 5 V output
500 mW output power
Quad dc-to-25 Mbps (NRZ) signal isolation channels
Schmitt trigger inputs
16-lead SOIC package with >8 mm creepage
High temperature operation: 105°C
High common-mode transient immunity: >25 kV/μs
Safety and regulatory approvals (pending)
UL recognition
2500 V rms for 1 minute per UL1577
CSA Component Acceptance Notice #5A
VDE certificate of conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 560 V peak
ADuM540x应用:
RS-232/RS-422/RS-485 transceiver
Industrial field bus isolation
Power supply startup bias and gate drive
Isolated sensor interface
Industrial PLC
ADuM540x评估板
The ADuM540x evaluation board can be used with iCoupler® isolation products in the wide body SOP16 package. The evaluation board supports the common pad positions for power, ground, and I/O pins found in nearly all of the iCoupler products and is a configurable board that can be adapted to many iCoupler products.
ADuM540x评估板主要特性:
Convenient connections for power through screw terminal blocks
dd-on BNC connector for 50 Ω signal sources
On-board signal routing
Support for signal wrap back
Simple signal paths to reduce transmission line effects
Pull-up and pull-down provided for control lines
Support for isoPower
Project area that supports surface-mount and through hole devices
图2.ADuM540x评估板外形图
图3. ADuM540x评估板电路图
材料清单(BOM):
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