LMC835 Datasheet | National Semiconductor

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 d B or g 6 d B gain range and 25 steps each Only three digital inputs are needed to control the equalization The LMC835 makes it easy to build a m P-controlled equalizer The signal path is designed for very low noise and distortion resulting in very high performance patible with PCM audio Features Y Y Y Y Y Y No volume controls required Three-wire interface 14 bands 25 steps each g 12 d B or g 6 d B gain ranges Low noise and distortion TTL CMOS logic patible 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 Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications 18V Allowable Input Voltage (Note 1) VSSb0 3V to VDD a 0 3V b 60 C to a 150 C Storage Temperature Tstg a 260 C Lead Temperature (Soldering 10 sec) N Pkg Lead Temperature V Pkg a 215 C Vapor Phase (60 sec) a 220 C Infrared (15 sec) Supply Voltage VDDb VSS Operating Ratings Supply Voltage VDDb VSS Digital Ground (Pin 13) Digital Input (Pins 14 15 16) Analog Input (Pins 1 2 3 4 25 26 27) (Note 1) Operating Temperature Topr 5V to 16V VSS to VDD VSS to VDD VSS to VDD b 40 C to a 85 C Electrical Characteristics (Note 2) VDD e 7 5V LOGIC SECTION Symbol IDDL ISSL IDDH ISSH...