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ADM4850

更新时间： 2024-11-24 22:39:03

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	614K
描述
5 V Slew-Rate Limited Half- and Full-Duplex RS-485/RS-422 Transceivers

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ADM4850 数据手册

5 V Slew-Rate Limited Half- and Full-Duplex

RS-485/RS-422 Transceivers

ADM4850–ADM4857

FEATURES

FUNCTIONAL BLOCK DIAGRAM

EIA RS-485-/RS-422-compliant

Data rate options

ADM4850/ADM4854—115 kbps

ADM4851/ADM4855—500 kbps

ADM4850/ADM4851/

ADM4852/ADM4853

ADM4854/ADM4855/

ADM4856/ADM4857

ADM4852/ADM4856—2.5 Mbps

ADM4853/ADM4857—10 Mbps

Half- and full-duplex options

Reduced slew rates for low EMI

True fail-safe receiver inputs

5 µA (maximum) supply current in shutdown mode

Up to 256 transceivers on one bus

Outputs high-z when disabled or powered off

−7 V to +12 V bus common-mode range

Thermal shutdown and short-circuit protection

Pin-compatible with MAX308x

GND

Figure 1.

Specified over the −40°C to +85°C temperature range

Available in 8-lead SOIC and LFCSP packages

APPLICATIONS

Low power RS-485 applications

EMI-sensitive systems

DTE-DCE interfaces

Industrial control

Packet switching

Local area networks

Level translators

GENERAL DESCRIPTION

The ADM4850−ADM4857 are differential line transceivers

suitable for high speed half- and full-duplex data communication

on multipoint bus transmission lines. They are designed for

balanced data transmission and comply with EIA Standards

RS-485 and RS-422. The ADM4850−ADM4853 are half-duplex

transceivers, which share differential lines and have separate

enable inputs for the driver and receiver. The full-duplex

ADM4854−ADM4857 transceivers have dedicated differential

line driver outputs and receiver inputs.

The driver outputs are slew-rate limited to reduce EMI and data

errors caused by reflections from improperly terminated buses.

Excessive power dissipation caused by bus contention or by

output shorting is prevented with a thermal shutdown circuit.

The parts are fully specified over the commercial and industrial

temperature ranges, and are available in 8-lead SOIC and LFCSP

packages.

Table 1. Selection Table

Part No

Half-/Full-Duplex

Data Rate

115 kbps

500 kbps

2.5 Mbps

10 Mbps

115 kbp

500 kbps

2.5 Mbps

10 Mbps

The parts have a 1/8-unit-load receiver input impedance, which

allows up to 256 transceivers on one bus. Since only one driver

should be enabled at any time, the output of a disabled or pow-

ered-down driver is three-stated to avoid overloading the bus.

ADM4850

ADM4851

ADM4852

ADM4853

ADM4854

ADM4855

ADM4856

ADM4857

Half

Full

The receiver inputs have a true fail-safe feature, which ensures a

logic high output level when the inputs are open or shorted.

This guarantees that the receiver outputs are in a known state

before communication begins and when communication ends.

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

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

Fax: 781.326.8703

www.analog.com

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与ADM4850相关器件

型号	品牌	获取价格	描述	数据表
ADM4850_12	ADI	获取价格	5 V, Slew-Rate Limited, Half-Duplex and Full-Duplex RS-485/RS-422 Transceivers
ADM4850_15	ADI	获取价格	5 V, Slew-Rate Limited, Half-Duplex and Full-Duplex RS-485/RS-422 Transceivers
ADM4850ACP	ADI	获取价格	IC LINE TRANSCEIVER, DSO8, LFCSP-8, Line Driver or Receiver
ADM4850ACP-REEL	ADI	获取价格	5 V Slew-Rate Limited Half- and Full-Duplex RS-485/RS-422 Transceivers
ADM4850ACP-REEL7	ADI	获取价格	5 V Slew-Rate Limited Half- and Full-Duplex RS-485/RS-422 Transceivers
ADM4850ACPZ-REEL7	ADI	获取价格	5 V, Slew-Rate Limited, Half-Duplex and Full-Duplex RS-485/RS-422 Transceivers
ADM4850AR	ROCHESTER	获取价格	LINE TRANSCEIVER, PDSO8, MS-012AA, SOIC-8
ADM4850AR	ADI	获取价格	5 V Slew-Rate Limited Half- and Full-Duplex RS-485/RS-422 Transceivers
ADM4850ARMZ	ADI	获取价格	5 V, Slew-Rate Limited, Half-Duplex and Full-Duplex RS-485/RS-422 Transceivers
ADM4850ARMZ-REEL7	ADI	获取价格	5 V, Slew-Rate Limited, Half-Duplex and Full-Duplex RS-485/RS-422 Transceivers

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