LM4811_15 Datasheet, PDF (1/24 Pages) Unisonic Technologies – DUAL 105mW HEADPHONE AMPLIFIER WITH DIGITAL VOLUME CONTROL

LM4811
www.ti.com
SNAS119D – DECEMBER 2000 – REVISED APRIL 2013
LM4811
Dual 105mW Headphone Amplifier with Digital
Volume Control and Shutdown Mode
Check for Samples: LM4811
FEATURES
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•2 Digital Volume Control Range from +12dB to
−33dB
• WSON and VSSOP Surface Mount Packaging
• "Click and Pop" Suppression Circuitry
• No Bootstrap Capacitors Required
• Low Shutdown Current
APPLICATIONS
• Cellular Phones
• MP3, CD, DVD Players
• PDA's
• Portable Electronics
KEY SPECIFICATIONS
• 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)
DESCRIPTION
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
portable systems.
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.
Connection Diagrams
Top View
Top View
Figure 1. VSSOP Package
See Package Number DGS0010A
Figure 2. WSON Package
See Package Number NGY0010A
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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