adm1487ar Analog Devices, Inc., adm1487ar Datasheet

adm1487ar

Manufacturer Part Number

adm1487ar

Description

Ultra-low Power Rs-485/rs-422 Transceiver With Low Emi And +/-10kv Esd Protection

Manufacturer

Analog Devices, Inc.

Datasheet

1.ADM1487AR.pdf (8 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

adm1487arZ

Manufacturer:

ADI/亚德诺

Quantity:

20 000

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REV. PrC 08/02

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.

FEATURES

APPLICATIONS

Low Power - 120µA Max ICC with Driver Disabled

High Input Impedance — Up to 256 Transceivers on Bus

Low-Current (1µA) Shutdown Mode

Slew Rate Control for Error-Free Data

Transmission and Low EMI

±10kV ESD Protection (Human Body Model) on

RS-485 I/O pins

Thermal Protection of Driver

Glitch-Free Driver Power-Up Allows Hot Connection

Driver Maintains High Output Impedance with Power

Off

Wide Common-Mode Range Allows ±7V Ground Differ-

ences Between Devices

Pin-Compatible with Industry Standard 75176

Battery-Powered RS-485/RS-422 Systems

Level Translation

Preliminary Technical Data

PRELIMINARY TECHNICAL DATA

FUNCTIONAL BLOCK DIAGRAM

Ultra-Low Power RS-485/RS-422 Transceiver

with Low EMI and +/-10kV ESD Protection

ADM1487

– 1 –

GENERAL DESCRIPTION

The ADM1487 is an ultra-low power RS-485/RS-422

transceiver consisting of one driver and one receiver per

package. Quiescent operating current is typically 80µA

and 1µA in shutdown mode. The driver and receiver both

have three-state outputs. This allows multiple drivers to be

connected to an RS-485/RS-422 bus, or several receiver

outputs to be connected to a serial data bus. The driver

will maintain a high-impedance output state even with

power off, while the receiver features fail-safe operation

that guarantees a logic high output if the inputs are left

open-circuit.

The device has slew-rate limited drivers to minimize elec-

tromagnetic interference (EMI) and reduce reflections

caused by incorrectly terminated cables.

One Technology Way, P .O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

GND

Analog Devices, Inc., 2002

ADM1487

www.analog.com

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