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 distor-
tion 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 鈥?26
Top View
Order Number LMC835V
See NS Package V28A
TL H 6753 鈥?1
Top View
Order Number LMC835N
See NS Package N28B
C
1995 National Semiconductor Corporation
TL H 6753
RRD-B30M75 Printed in U S A