LMC835

LMC835 Digital Controlled Graphic Equalizer February 1995 LMC835 Digital Controlled Graphic Equalizer General Description The LMC835 is a monolithic digitally-controlled graphic equalizer CMOS LSI for Hi-Fi audio The LMC835 consists of a Logic section and a Signal Path section made of analog switches and thin-film silicon-chromium resistor networks The LMC835 is used with external resonator circuits to make a stereo equalizer with seven bands g 12 dB or g 6 dB gain range and 25 steps each Only three digital inputs are needed to control the equalization The LMC835 makes it easy to build a mP-controlled equalizer The signal path is designed for very low noise and distortion resulting in very high performance compatible with PCM audio Features Y Y Y Y Y Y No volume controls required Three-wire interface 14 bands 25 steps each g 12 dB or g 6 dB gain ranges Low noise and distortion TTL CMOS logic compatible Applications Y Y Y Y Y Y Y Hi-Fi equalizer Receiver Car stereo Musical instrument Tape equalization Mixer Volume controller Connection Diagrams Dual-In-Line Package Molded Chip Carrier Package TL H 6753 – 26 Top View Order Number LMC835V See NS Package V28A TL H 6753 – 1 Top View Order Number LMC835N See NS Package N28B C1995 National Semiconductor Corporation TL H 6753 RRD-B30M75 Printed in U S A Block Diagram TL H 6753 – 2 2 Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Dist...