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ADM4857ARZ

更新时间： 2024-09-30 12:27:23
品牌 Logo 应用领域
亚德诺 - ADI 线路驱动器或接收器驱动程序和接口接口集成电路光电二极管
页数 文件大小 规格书
16页 446K
描述
5 V, Slew-Rate Limited, Half-Duplex and Full-Duplex RS-485/RS-422 Transceivers

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ADM4857ARZ 数据手册

 浏览型号ADM4857ARZ的Datasheet PDF文件第2页浏览型号ADM4857ARZ的Datasheet PDF文件第3页浏览型号ADM4857ARZ的Datasheet PDF文件第4页浏览型号ADM4857ARZ的Datasheet PDF文件第5页浏览型号ADM4857ARZ的Datasheet PDF文件第6页浏览型号ADM4857ARZ的Datasheet PDF文件第7页 
5 V, Slew-Rate Limited, Half-Duplex and  
Full-Duplex RS-485/RS-422 Transceivers  
ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857  
FEATURES  
FUNCTIONAL BLOCK DIAGRAMS  
V
CC  
EIA RS-485-/RS-422-compliant  
Data rate options  
ADM4850/ADM4854: 115 kbps  
ADM4850/ADM4851/  
ADM4852/ADM4853  
ADM4851/ADM4855: 500 kbps  
RO  
R
ADM4852/ADM4856: 2.5 Mbps  
ADM4853/ADM4857: 10 Mbps  
Half- and full-duplex options  
A
B
RE  
DE  
Reduced slew rates for low EMI  
D
DI  
True fail-safe receiver inputs  
5 μA (maximum) supply current in shutdown mode  
Up to 256 transceivers on one bus  
Outputs high-Z when disabled or powered off  
−7 V to +12 V bus common-mode range  
Thermal shutdown and short-circuit protection  
Pin-compatible with the MAX308x  
Specified over the −40°C to +85°C temperature range  
Available in 8-lead SOIC, LFCSP, and MSOP packages  
Qualified for automotive applications  
GND  
Figure 1.  
V
CC  
ADM4854/ADM4855/  
ADM4856/ADM4857  
A
RO  
DI  
R
B
APPLICATIONS  
Z
Y
Low power RS-485 applications  
EMI-sensitive systems  
DTE-DCE interfaces  
Industrial control  
D
GND  
Packet switching  
Figure 2.  
Local area networks  
Level translators  
before communication begins and when communication ends.  
The driver outputs are slew-rate limited to reduce EMI and data  
errors caused by reflections from improperly terminated buses.  
Excessive power dissipation caused by bus contention or by output  
shorting is prevented with a thermal shutdown circuit.  
GENERAL DESCRIPTION  
The ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/  
ADM4855/ADM4856/ADM4857 are differential line transceivers  
suitable for high speed half- and full-duplex data communication on  
multipoint bus transmission lines. They are designed for balanced  
data transmission and comply with EIA Standards RS-485 and  
RS-422. The ADM4850/ADM4851/ADM4852/ADM4853 are half-  
duplex transceivers that share differential lines and have separate  
enable inputs for the driver and receiver. The full-duplex  
The parts are fully specified over the commercial and industrial  
temperature ranges and are available in 8-lead SOIC, LFCSP  
(ADM4850/ADM4851/ADM4852/ADM4853), and MSOP  
(ADM4850 only) packages.  
ADM4854/ADM4855/ADM4856/ADM4857 transceivers have  
dedicated differential line driver outputs and receiver inputs.  
Table 1. Selection Table  
Part No.  
Half-/Full-Duplex  
Data Rate  
115 kbps  
500 kbps  
2.5 Mbps  
10 Mbps  
115 kbps  
500 kbps  
2.5 Mbps  
10 Mbps  
ADM4850  
ADM4851  
ADM4852  
ADM4853  
ADM4854  
ADM4855  
ADM4856  
ADM4857  
Half  
Half  
Half  
Half  
Full  
Full  
Full  
Full  
The parts have a 1/8-unit-load receiver input impedance, which  
allows up to 256 transceivers on one bus. Because only one driver  
should be enabled at any time, the output of a disabled or pow-  
ered-down driver is three-stated to avoid overloading the bus.  
The receiver inputs have a true fail-safe feature, which ensures  
a logic high output level when the inputs are open or shorted.  
This guarantees that the receiver outputs are in a known state  
Rev. D  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights of third parties that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700 www.analog.com  
Fax: 781.461.3113 ©2004–2012 Analog Devices, Inc. All rights reserved.  
 
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ADM4857ARZ 替代型号

型号 品牌 替代类型 描述 数据表
ADM4857ARZ-REEL7 ADI

完全替代

 5 V, Slew-Rate Limited, Half-Duplex and Full-Duplex RS-485/RS-422 Transceivers
ADM4853ARZ ADI

完全替代

 5 V, Slew-Rate Limited, Half-Duplex and Full-Duplex RS-485/RS-422 Transceivers

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