LM2893

更新时间： 2024-11-05 22:51:43

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
24页	576K
描述
LM1893/LM2893 Carrier-Current Transceiver

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LM2893 数据手册

April 1995

LM1893/LM2893 Carrier-Current Transceiver

General Description

Output power easily boosted 10-fold

50 to 300 kHz carrier frequency choice

TTL and MOS compatible digital levels

Regulated voltage to power logic

Carrier-current systems use the power mains to transfer in-

formation between remote locations. This bipolar carrier-

current chip performs as a power line interface for half-du-

plex (bi-directional) communication of serial bit streams of

virtually any coding. In transmission, a sinusoidal carrier is

FSK modulated and impressed on most any power line via a

rugged on-chip driver. In reception, a PLL-based demodula-

tor and impulse noise filter combine to give maximum range.

A complete system may consist of the LM1893, a COPS^TM

controller, and discrete components.

Drives all conventional power lines

Applications

Energy management systems

Home convenience control

Inter-office communication

Appliance control

Features

Fire alarm systems

Noise resistant FSK modulation

Security systems

User-selected impulse noise filtering

Telemetry

Up to 4.8 kBaud data transmission rate

Computer terminal interface

Strings of 0’s or 1’s in data allowed

Sinusoidal line drive for low RFI

Typical Application

TL/H/6750–1

FIGURE 1. Block diagram of carrierÐcurrent chip with a complement of discrete components making a complete

360 Baud transceiver. Use caution with this circuitÐdangerous line voltage is present.

125 kHz, f

DATA

BI-LINE^TMand COPS^TMare trademarks of National Semiconductor Corp.

Carrier-Current Transceivers are also called Power Line Carrier (PLC) transceivers.

1995 National Semiconductor Corporation

TL/H/6750

RRD-B30M115/Printed in U. S. A.

12 3 4 5 6 7...24

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