Datasheet > ADM1485_12

ADM1485_12

更新时间： 2024-09-17 12:27:19

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
11页	356K
描述
5 V Low Power EIA RS-485 Transceiver

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ADM1485_12 数据手册

5 V Low Power

EIA RS-485 Transceiver

ADM1485

FEATURES

Meets EIA RS-485 Standard

30 Mbps Data Rate

FUNCTIONAL BLOCK DIAGRAM

8-Lead

Single 5 V Supply

–7 V to +12 V Bus Common-Mode Range

High Speed, Low Power BiCMOS

Thermal Shutdown Protection

Short-Circuit Protection

ADM1485

Driver Propagation Delay: 10 ns

Receiver Propagation Delay: 15 ns

High-Z Outputs with Power Off

Superior Upgrade for LTC1485

APPLICATIONS

Low Power RS-485 Systems

DTE-DCE Interface

GND

Packet Switching

Local Area Networks

Data Concentration

Data Multiplexers

Integrated Services Digital Network (ISDN)

GENERAL DESCRIPTION

This minimizes the loading effect when the transceiver is not being

used. The high impedance driver output is maintained over the

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

The ADM1485 is a differential line transceiver suitable for high

speed bidirectional data communication on multipoint bus trans-

mission lines. It is designed for balanced data transmission and

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

contains a differential line driver and a differential line receiver.

Both the driver and the receiver may be enabled independently.

When disabled, the outputs are three-stated.

The receiver contains a fail-safe feature that results in a logic

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

The ADM1485 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 ADM1485 operates from a single 5 V power supply. Excessive

power dissipation caused by bus contention or by output shorting

is prevented by a thermal shutdown circuit. This feature forces

the driver output into a high impedance state if, during fault condi-

tions, a significant temperature increase is detected in the internal

driver circuitry.

The ADM1485 features extremely fast switching speeds. Minimal

driver propagation delays permit transmission at typical data rates

of 30 Mbps while low skew minimizes EMI interference.ꢀ

The part is fully specified over the commercial and industrial

temperature range and is available in PDIP, SOIC, and small

MSOP packages.

Up to 32 transceivers may be connected simultaneously on a bus,

but only one driver should be enabled at any time. It is important,

therefore, that the remaining disabled drivers do not load the bus.

To ensure this, the ADM1485 driver features high output

impedance when disabled and also when powered down.

REV.

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

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

under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks 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

781/461-3113

2012

Fax:

12 3 4 5 6 7...11

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与ADM1485_12相关器件

型号	品牌	获取价格	描述	数据表
ADM1485AN	ADI	获取价格	+-5 V Low Power EIA RS-485 Transceiver
ADM1485AN	ROCHESTER	获取价格	LINE TRANSCEIVER, PDIP8, PLASTIC, MO-095AA, DIP-8
ADM1485ANZ	ADI	获取价格	5 V Low Power EIA RS-485 Transceiver
ADM1485ANZ	ROCHESTER	获取价格	LINE TRANSCEIVER, PDIP8, PLASTIC, MO-095AA, DIP-8
ADM1485AQ	ADI	获取价格	+-5 V Low Power EIA RS-485 Transceiver
ADM1485AR	ADI	获取价格	+-5 V Low Power EIA RS-485 Transceiver
ADM1485AR	ROCHESTER	获取价格	LINE TRANSCEIVER, PDSO8, MS-012AA, SOIC-8
ADM1485ARM	ADI	获取价格	5 V, High Speed (30 Mbps), Low Power, Half Duplex EIA RS-485 Transceiver
ADM1485ARM-REEL	ADI	获取价格	5 V, High Speed (30 Mbps), Low Power, Half Duplex EIA RS-485 Transceiver
ADM1485ARM-REEL7	ADI	获取价格	5 V, High Speed (30 Mbps), Low Power, Half Duplex EIA RS-485 Transceiver

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