SNAS119D – DECEMBER 2000 – REVISED APRIL 2013
Dual 105mW Headphone Amplifier with Digital
Volume Control and Shutdown Mode
Check for Samples: LM4811
•2 Digital Volume Control Range from +12dB to
• WSON and VSSOP Surface Mount Packaging
• "Click and Pop" Suppression Circuitry
• No Bootstrap Capacitors Required
• Low Shutdown Current
• Cellular Phones
• MP3, CD, DVD Players
• Portable Electronics
• THD+N at 1kHz, 105mW Continuous Average
Output Power into 16Ω 0.1 % (typ)
• THD+N at 1kHz, 70mW Continuous Average
Power into 32Ω 0.1 % (typ)
• Shutdown Current 0.3 μA (typ)
The LM4811 is a dual audio power amplifier capable
of delivering 105mW per channel of continuous
average power into a 16Ω load with 0.1% (THD+N)
from a 5V power supply.
Boomer audio power amplifiers were designed
specifically to provide high quality output power with a
minimal amount of external components. Since the
LM4811 does not require bootstrap capacitors or
snubber networks, it is optimally suited for low-power
The LM4811 features a digital volume control that
sets the amplifier's gain from +12dB to −33dB in 16
discrete steps using a two−wire interface.
The unity-gain stable LM4811 also features an
externally controlled, active-high, micropower
consumption shutdown mode. It also has an internal
thermal shutdown protection mechanism.
Figure 1. VSSOP Package
See Package Number DGS0010A
Figure 2. WSON Package
See Package Number NGY0010A
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