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ADM485ARM-REEL

更新时间： 2024-11-24 12:25:59

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	607K
描述
Meets EIA RS-485 standard

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数据手册

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ADM485ARM-REEL 数据手册

5 V Low Power

EIA RS-485 Transceiver

ADM485

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Meets EIA RS-485 standard

5 Mbps data rate

ADM485

Single 5 V supply

–7 V to +12 V bus common-mode range

High speed, low power BiCMOS

Thermal shutdown protection

Short-circuit protection

Driver propagation delay: 10 ns typical

Receiver propagation delay: 15 ns typical

High-Z outputs with power off

Superior upgrade for LTC485

GND

Figure 1.

APPLICATIONS

Low power RS-485 systems

DTE/DCE interface

Packet switching

Local area networks (LNAs)

Data concentration

Data multiplexers

Integrated services digital network (ISDN)

GENERAL 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 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 can 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 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

output shorting is prevented by a thermal shutdown circuit. If

during fault conditions, a significant temperature increase is

detected in the internal driver circuitry, this feature forces the

driver output into a high impedance state.

The ADM485 features extremely fast switching speeds. Minimal

driver propagation delays permit transmission at data rates up

to 5 Mbps while low skew minimizes EMI interference.

The part is fully specified over the commercial and industrial

temperature range and is available in 8-lead PDIP, 8-lead SOIC,

and small footprint, 8-lead MSOP packages.

Up to 32 transceivers can 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 ADM485 driver features high

output impedance when disabled and when powered down,

which minimizes the loading effect when the transceiver is not

being used. The high impedance driver output is maintained

over the common-mode voltage range of −7 V to +12 V.

Rev. F

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

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与ADM485ARM-REEL相关器件

型号	品牌	获取价格	描述	数据表
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
ADM485AR-REEL	ADI	获取价格	Meets EIA RS-485 standard
ADM485AR-REEL	ROCHESTER	获取价格	LINE TRANSCEIVER, PDSO8, MS-012AA, SOIC-8

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