LM1893 Overview
Description
Carrier-current systems use the power mains to transfer information between remote locations This bipolar carriercurrent chip performs as a power line interface for half-duplex (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 demodulator and impulse noise filter combine to give maximum range A complete system may consist of the LM1893 a COPSTM controller and discrete components Y Y Y Y Y Output power easily boosted 10-fold 50 to 300 kHz carrier frequency choice TTL and MOS compatible digital levels Regulated voltage to power logic Drives all conventional power lines.
