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ADM1485

更新时间： 2024-02-15 03:17:12

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
8页	141K
描述
+-5 V Low Power EIA RS-485 Transceiver

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ADM1485 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SOIC
包装说明：	SOIC-8	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	0.7
Samacsys Confidence：	3	Samacsys Status：	Released
2D Presentation：	https://componentsearchengine.com/2D/0T/236838.1.2.png	Schematic Symbol：	https://componentsearchengine.com/symbol.php?partID=236838
PCB Footprint：	https://componentsearchengine.com/footprint.php?partID=236838	3D View：	https://componentsearchengine.com/viewer/3D.php?partID=236838
Samacsys PartID：	236838	Samacsys Image：	https://componentsearchengine.com/Images/9/ADM1485JRZ-REEL.jpg
Samacsys Thumbnail Image：	https://componentsearchengine.com/Thumbnails/1/ADM1485JRZ-REEL.jpg	Samacsys Pin Count：	8
Samacsys Part Category：	Integrated Circuit	Samacsys Package Category：	Small Outline Packages
Samacsys Footprint Name：	R-8 (SOIC)	Samacsys Released Date：	2015-11-06 07:15:09
Is Samacsys：	N	其他特性：	THERMAL SHUTDOWN PROTECTION
差分输出：	YES	驱动器位数：	1
高电平输入电流最大值：	0.000001 A	输入特性：	DIFFERENTIAL SCHMITT TRIGGER
接口集成电路类型：	LINE TRANSCEIVER	接口标准：	EIA-422; EIA-485
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e3
长度：	4.9 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	8
最高工作温度：	70 °C	最低工作温度：
最小输出摆幅：	1.5 V	输出特性：	3-STATE
最大输出低电流：	0.004 A	输出极性：	COMPLEMENTARY
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装等效代码：	SOP8,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
电源：	5 V	认证状态：	Not Qualified
最大接收延迟：	40 ns	接收器位数：	1
座面最大高度：	1.75 mm	子类别：	Line Driver or Receivers
最大压摆率：	2.2 mA	最大供电电压：	5.25 V
最小供电电压：	4.75 V	标称供电电压：	5 V
表面贴装：	YES	技术：	BICMOS
温度等级：	COMMERCIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
最大传输延迟：	15 ns	宽度：	3.9 mm
Base Number Matches：	1

ADM1485 数据手册

+5 V Low Power

EIA RS-485 Transceiver

ADM1485

FEATURES

Meets EIA RS-485 Standard

30 Mb/s 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

Zero Skew Driver

Driver Propagation Delay: 10 ns

Receiver Propagation Delay: 25 ns

High Z Outputs with Power Off

Superior Upgrade for LTC1485

GND

APPLICATIONS

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.

GENERAL DESCRIPTION

The ADM1485 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 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 conditions a significant temperature increase is

detected in the internal driver circuitry.

The ADM1485 features extremely fast switching speeds. Mini-

mal driver propagation delays permit transmission at data rates

up to 30 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

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.

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

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