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參數(shù)資料
| 型號(hào)： | LMC1992CCN |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | LMC1992 Digitally-Controlled Stereo Tone and Volume Circuit with Four-Channel Input-Selector |
| 中文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDIP28 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件頁(yè)數(shù)： | 1/14頁(yè) |
| 文件大小： | 260K |
| 代理商： | LMC1992CCN |
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TL/H/10789
L
V
December 1994
LMC1992 Digitally-Controlled Stereo Tone and Volume
Circuit with Four-Channel Input-Selector
General Description
The LMC1992 is a monolithic integrated circuit that provides
four stereo inputs, bass and treble tone controls, and vol-
ume, balance, and front-rear fader controls. These functions
are digitally controlled through a three-wire communication
interface. All of the LMC1992s functions are achieved with
only three external capacitors per channel. It is designed for
line level input signals (300 mV
b
2V) and has a maximum
gain of 0 dB.
The internal design is optimized for external capacitors hav-
ing values of 0.1
m
F or less. This allows the use of chip
capacitors for coupling and tone control functions.
Low noise and distortion result from using analog switches
and thin-film silicon-chromium resistor networks in the sig-
nal path.
Volume and fader are at minimum and tone controls are flat
when supply voltage is first applied.
Additional tone control can be achieved using the LMC835
stereo
7-band
graphic
equalizer
LMC1992’s select-out/select-in external processor loop.
connected
to
the
Features
Y
Low noise and distortion
Y
Four stereo inputs
Y
40 volume levels including mute
Y
20 fader levels
Y
All attenuators have a 2 dB of attenuation per step
Y
Front/back fade control
Y
External processor loop
Y
Only three external components per channel
Y
Serial programmable: standard MICROWIRE
TM
interface
Y
Single supply operation: 6V to 12V supply voltage
Y
Protection address (similar to DS8906)
Y
DC-coupled inputs
Y
Single supply operation
Applications
Y
Automotive audio systems
Y
Sound reinforcement systems
Y
Home entertainmentDstereo television and music re-
production systems
Y
Electronic music (MIDI)
Block and Connection Diagrams
TL/H/10789–1
Left channel shown. Pin numbers in parentheses are for the right channel.
TL/H/10789–2
Order Number LMC1992CCN
See NS Package Number N28B
DNR
é
is a registered trademark of National Semiconductor Corporation.
COPS
TM
and MICROWIRE
TM
are trademarks of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
RRD-B30M75/Printed in U. S. A.
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