Product description
The LM4834 is a monolithic integrated circuit that provides
DC volume control, and a bridged audio power amplifier
capable of producing 1.75W into 4Ω with less than 1.0%
(THD). In addition, the headphone/lineout amplifier is capable of driving 70 mW into 32? with less than 0.1%(THD).
The LM4834 incorporates a volume control and an input
microphone preamp stage capable of driving a 1 kΩ load
impedance.
Boomer® audio integrated circuits were designed specifically
to provide high quality audio while requiring a minimum
amount of external components in surface mount packaging.
The LM4834 incorporates a DC volume control, a bridged
audio power amplifier and a microphone preamp stage,
making it optimally suited for multimedia monitors and desktop computer applications.
The LM4834 features an externally controlled, low-power
consumption shutdown mode, and both a power amplifier
and headphone mute for maximum system flexibility and
performance.
Key Specifications
THD at 1.1W continuous average output power into 8Ω at 1kHz 0.5% (max)
Output Power into 4Ω at 1.0% THD+N 1.75W (typ)
THD at 70mW continuous average output power into
32Ω at 1kHz 0.1% (typ)
Shutdown Current 1.0µA (max)
Supply Current 17.5mA (typ)
Features
PC98 Compliant
"Click and Pop" suppression circuitry
Stereo line level outputs with mono input capability for
system beeps
Microphone preamp with buffered power supply
DC Volume Control Interface
Thermal shutdown protection circuitry
Applications
Multimedia Monitors
Desktop and Portable Computers
