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ADM1487JN

更新时间： 2024-02-10 23:32:14

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
8页	378K
描述
Ultra-Low Power RS-485/RS-422 Transceiver with Low EMI and +/-10kV ESD Protection

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ADM1487JN 数据手册

PRELIMINARY TECHNICAL DATA

Ultra-LowPowerRS-485/RS-422Transceiver

with Low EMI and +/-10kV ESD Protection

ADM1487

Preliminary Technical Data

FEATURES

GENERAL DESCRIPTION

Low Power - 120µA Max ICC with Driver Disabled

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.

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

±10ꢀk ESD Protection (Human Bodꢁ 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

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

tromagnetic interference (EMI) and reduce reflections

caused by incorrectly terminated cables.

Wide Common-Mode Range Allows ±±k Ground Differ-

ences Between Devices

Pin-Compatible with Industrꢁ Standard ±51±6

APPLICATIONS

Batterꢁ-Powered RS-485/RS-422 Sꢁstems

Level Translation

FUNCTIONAL BLOCK DIAGRAM

GND

ADM1487

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.

One Technologꢁ Waꢁ, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: ±81/329-4±00

Fax: ±81/326-8±03

www.analog.com

Analog Devices, Inc., 2002

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