Features: ·Low noise and distortion
·Four stereo inputs
·40 volume levels including mute
·20 fader levels
·All attenuators have a 2 dB of attenuation per step
·Front/back fade control
·External processor loop
·Only three external components per channel
·Serial programmable: standard MICROWIRETM interface
·Single supply operation: 6V to 12V supply voltage
·Protection address (similar to DS8906)
·DC-coupled inputs
·Single supply operationApplication`Automotive audio systems
`Sound reinforcement systems
`Home entertainmentstereo television and music reproduction systems
`Electronic music (MIDI)
Pinout
SpecificationsSupply Voltage (V+ - GND) ......................................................................15V
Voltage at Any Pin ...................................................GND - 0.2V to V+ + 0.2V
Input Current at Any Pin (Note 3) .........................................................5 mA
Package Input Current (Note 3) ..........................................................20 mA
Power Dissipation (Note 4) ...............................................................500 mW
Junction Temperature ...........................................................................125
Storage Temperature ...........................................................-65 to +150
Lead Temperature
N Package, Soldering, 10 sec. ............................................................+260
ESD Susceptibility (Note 5) ..................................................................2000V
Pins 9, 10, 11, 19, 20, 21 ......................................................................850V
DescriptionThe LMC1992 is a monolithic integrated circuit that provides four stereo inputs, bass and treble tone controls, and volume, 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 having values of 0.1 mF 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 signal 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 connected to the LMC1992's select-out/select-in external processor loop.
LMC1992 Data Sheet
