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ADM485AR

更新时间： 2024-11-19 22:50:03

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
8页	135K
描述
+5 V Low Power EIA RS-485 Transceiver

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数据手册
替代型号

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ADM485AR 数据手册

+5 V Low Power

EIA RS-485 Transceiver

ADM485

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Meets EIA RS-485 Standard

5 Mb/s Data Rate

Single +5 V Supply

ADM485

–7 V to +12 V Bus Common-Mode Range

High Speed, Low Power BiCMOS

Thermal Shutdown Protection

Short Circuit Protection

Zero Skew Driver

Driver Propagation Delay: 10 ns

Receiver Propagation Delay: 25 ns

High Z Outputs with Power Off

Superior Upgrade for LTC485

APPLICATIONS

GND

Low Power RS-485 Systems

DTE-DCE Interface

Packet Switching

Local Area Networks

Data Concentration

Data Multiplexers

Integrated Services Digital Network (ISDN)

This minimizes the loading effect when the transceiver is not

being utilized. The high impedance driver output is maintained

over the entire common-mode voltage range from –7 V to +12 V.

PRODUCT DESCRIPTION

The ADM485 is a differential line transceiver suitable for high

speed bidirectional data communication on multipoint bus

transmission lines. It is designed for balanced data transmission

and complies with both EIA Standards RS-485 and RS-422.

The part contains a differential line driver and a differential line

receiver. Both the driver and the receiver may be enabled inde-

pendently. When disabled, the outputs are tristated.

The receiver contains a fail safe feature which results in a logic

high output state if the inputs are unconnected (floating).

The ADM485 is fabricated on BiCMOS, an advanced mixed

technology process combining low power CMOS with fast

switching bipolar technology. All inputs and outputs contain

protection against ESD; all driver outputs feature high source

and sink current capability. An epitaxial layer is used to guard

against latch-up.

The ADM485 operates from a single +5 V power supply.

Excessive power dissipation caused by bus contention or by out-

put shorting is prevented by a thermal shutdown circuit. This

feature forces the driver output into a high impedance state if

during fault conditions a significant temperature increase is

detected in the internal driver circuitry.

The ADM485 features extremely fast switching speeds. Minimal

driver propagation delays permit transmission at data rates up to

5 Mbits/s while low skew minimizes EMI interference.

Up to 32 transceivers may be connected simultaneously on a

bus, but only one driver should be enabled at any time. It is im-

portant, therefore, that the remaining disabled drivers do not

load the bus. To ensure this, the ADM485 driver features high

output impedance when disabled and also when powered down.

The part is fully specified over the commercial and industrial

temperature range and is available in an 8-lead DIL/SOIC package.

REV. A

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

12 3 4 5 6 7 8

中文翻译

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ADM485AR 替代型号

型号	品牌	替代类型	描述	数据表
ADM485AR-REEL	ADI	完全替代	Meets EIA RS-485 standard
ADM485JRZ-REEL	ADI	类似代替	5 V, Low Power, 5 Mbps, Half Duplex EIA RS-485 Transceiver
ADM1485ARZ-REEL	ADI	类似代替	5 V Low Power EIA RS-485 Transceiver

与ADM485AR相关器件

型号	品牌	获取价格	描述	数据表
ADM485ARM	ADI	获取价格	Meets EIA RS-485 standard
ADM485ARM-REEL	ADI	获取价格	Meets EIA RS-485 standard
ADM485ARM-REEL7	ADI	获取价格	Meets EIA RS-485 standard
ADM485ARM-REEL7	ROCHESTER	获取价格	LINE TRANSCEIVER, PDSO8, MO-187AA, MSOP-8
ADM485ARMZ	ADI	获取价格	5 V, Low Power, 5 Mbps, Half Duplex EIA RS-485 Transceiver
ADM485ARMZ	ROCHESTER	获取价格	LINE TRANSCEIVER, PDSO8, MO-187AA, MSOP-8
ADM485ARMZ1	ADI	获取价格	Meets EIA RS-485 standard
ADM485ARMZ-REEL1	ADI	获取价格	Meets EIA RS-485 standard
ADM485ARMZ-REEL7	ADI	获取价格	5 V, Low Power, 5 Mbps, Half Duplex EIA RS-485 Transceiver
ADM485ARMZ-REEL71	ADI	获取价格	Meets EIA RS-485 standard

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