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ADM2491EBRWZ

更新时间： 2024-09-27 12:53:55
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PC
页数 文件大小 规格书
16页 410K
描述
High Speed, ESD-Protected, Half-/Full-Duplex Coupler Isolated RS-485 Transceiver

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ADM2491EBRWZ 数据手册

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High Speed, ESD-Protected, Half-/Full-Duplex  
iCoupler Isolated RS-485 Transceiver  
ADM2491E  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
V
V
DD1  
DD2  
Isolated, RS-485/RS-422 transceiver, configurable as half- or  
full-duplex  
8 kV ESD protection on RS-485 input/output pins  
16 Mbps data rate  
ADM2491E  
DE  
Complies with ANSI TIA/EIA RS-485-A-1998 and  
ISO 8482: 1987(E)  
Y
Z
TxD  
Suitable for 5 V or 3.3 V operation (VDD1  
)
High common-mode transient immunity: >25 kV/μs  
Receiver has open-circuit, fail-safe design  
32 nodes on the bus  
A
B
RxD  
RE  
Thermal shutdown protection  
Safety and regulatory approvals  
UL recognition: 5000 V rms isolation voltage  
for 1 minute, per UL 1577  
VDE certificate of conformity  
GND  
GND  
2
1
Figure 1.  
DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12  
Reinforced insulation, VIORM = 848 V peak  
Operating temperature range: −40°C to +85°C  
Wide body, 16-lead SOIC package  
APPLICATIONS  
Isolated RS-485/RS-422 interfaces  
Industrial field networks  
INTERBUS  
Multipoint data transmission systems  
GENERAL DESCRIPTION  
The ADM2491E is an isolated data transceiver with 8 kV ESD  
protection and is suitable for high speed, half- or full-duplex  
communication on multipoint transmission lines. For half-  
duplex operation, the transmitter outputs and the receiver  
inputs share the same transmission line. Transmitter output  
Pin Y is linked externally to receiver input Pin A, and transmit-  
ter output Pin Z is linked to receiver input Pin B.  
The differential transmitter outputs and receiver inputs feature  
electrostatic discharge circuitry that provides protection to  
8 kV using the human body model (HBM). The logic side of  
the device can be powered with either a 5 V or a 3.3 V supply,  
whereas the bus side requires an isolated 5 V supply.  
The device has current-limiting and thermal shutdown features  
to protect against output short circuits and situations in which  
bus contention could cause excessive power dissipation.  
The ADM2491E is designed for balanced transmission lines  
and complies with ANSI TIA/EIA RS-485-A-1998 and ISO  
8482: 1987(E). The device employs Analog Devices, Inc.,  
iCoupler® technology to combine a 3-channel isolator, a three-  
state differential line driver, and a differential input receiver into  
a single package.  
The ADM2491E is available in a wide body, 16-lead SOIC package  
and operates over the −40°C to +85°C temperature range.  
Rev. B  
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  
rightsof third parties that may result fromits 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 andregisteredtrademarks are the 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 ©2007–2010 Analog Devices, Inc. All rights reserved.  
 
 
 
 
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ADM2491EBRWZ 替代型号

型号 品牌 替代类型 描述 数据表
ADM2491EBRWZ-REEL7 ADI

完全替代

 High Speed, ESD-Protected, Half-/Full-Duplex Coupler Isolated RS-485 Transceiver

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