Datasheet > ADM2481

ADM2481

更新时间： 2024-09-27 12:19:59

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
20页	282K
描述
Half-Duplex, iCoupler Isolated RS-485 Transceiver

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ADM2481 数据手册

Half-Duplex, iCoupler

Isolated RS-485 Transceiver

ADM2481

FUNCTIONAL BLOCK DIAGRAM

FEATURES

DD2

DD1

RS-485 transceiver with electrical data isolation

Complies with ANSI TIA/EIA-485-A and ISO 8482: 1987(E)

500 kbps data rate

ADM2481

Slew rate-limited driver outputs

Low power operation: 2.5 mA maximum

Suitable for 5 V or 3.3 V operations (V_DD1

TxD

)

High common-mode transient immunity: >25 kV/μs

True fail-safe receiver inputs

Chatter-free power-up/power-down protection

256 nodes on bus

RxD

Thermal shutdown protection

GND

Safety and regulatory approvals (pending)

UL recognition: 2500 V rms for 1 minute per

UL 1577 (pending)

Figure 1.

VDE certificates of conformity (pending)

DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12

_IORM= 560 V peak

Operating temperature range: −40°C to +85°C

APPLICATIONS

Low power RS-485/RS-422 networks

Isolated interfaces

Building control networks

Multipoint data transmission systems

GENERAL DESCRIPTION

The ADM2481 differential bus transceiver is an integrated,

galvanically isolated component designed for bidirectional data

communication on balanced, multipoint bus transmission lines.

It complies with ANSI EIA/TIA-485-A and ISO 8482: 1987(E).

Using iCoupler® technology from Analog Devices, Inc., the

ADM2481 combines a 3-channel isolator, a three-state diffe-

rential line driver, and a differential input receiver into a single

package. The logic side of the device is powered with either a

5 V or 3 V supply, and the bus side uses a 5 V supply only.

to form a differential I/O port. When the driver is disabled or

when V_DD1or V_DD2= 0 V, this imposes minimal loading on

the bus. An active-high receiver disable feature, which causes

the receiver output to enter a high impedance state, is provided

as well.

The receiver inputs have a true fail-safe feature that ensures a

logic-high receiver output level when the inputs are open or

shorted. This guarantees that the receiver outputs are in a

known state before communication begins and at the point

when communication ends.

The ADM2481 is slew-limited to reduce reflections with improp-

erly terminated transmission lines. The controlled slew rate

limits the data rate to 500 kbps. The input impedance of the

device is 96 kΩ, allowing up to 256 transceivers on the bus. Its

driver has an active-high enable feature. The driver differential

outputs and receiver differential inputs are connected internally

Current limiting and thermal shutdown features protect against

output short circuits and bus contention situations that might

cause excessive power dissipation. The part is fully specified

over the industrial temperature range of −40°C to +85°C and is

available in a 16-lead, wide body SOIC package.

Rev. 0

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

Fax: 781.461.3113

www.analog.com

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与ADM2481相关器件

型号	品牌	获取价格	描述	数据表
ADM2481BRWZ	ADI	获取价格	Half-Duplex, iCoupler Isolated RS-485 Transceiver
ADM2481BRWZ-RL7	ADI	获取价格	Half-Duplex, iCoupler Isolated RS-485 Transceiver
ADM2482E	ADI	获取价格	2.5 kV Isolated RS-485 Transceivers with Integrated Transformer Driver
ADM2482EBRWZ	ADI	获取价格	2.5 kV Isolated RS-485 Transceivers with Integrated Transformer Driver
ADM2482EBRWZ-REEL7	ADI	获取价格	2.5 kV Isolated RS-485 Transceivers with Integrated Transformer Driver
ADM2483	ADI	获取价格	Half-Duplex iCoupler-R Isolated RS-485 Transceiver
ADM2483BRW	ADI	获取价格	Half-Duplex iCoupler-R Isolated RS-485 Transceiver
ADM2483BRW-REEL	ADI	获取价格	Half-Duplex iCoupler-R Isolated RS-485 Transceiver
ADM2483BRW-RL	ADI	获取价格	IC LINE TRANSCEIVER, PDSO16, SOIC-16, Line Driver or Receiver
ADM2483BRWZ	ADI	获取价格	Half-Duplex, iCouplerÂ® Isolated RS-485 Trans

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