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LM4855 bảng dữ liệu(PDF) 1 Page - Texas Instruments

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LM4855 bảng dữ liệu(HTML) 1 Page - Texas Instruments

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LM4855
www.ti.com
SNAS164C – JUNE 2002 – REVISED MAY 2013
LM4855
Integrated Audio Amplifier System
Check for Samples: LM4855
1
FEATURES
DESCRIPTION
The LM4855 is an audio power amplifier system
2
1.1W (Typ) Output Power with 8
Ω Mono BTL
capable of delivering 1.1W (typ) of continuous
Load
average power into a mono 8
Ω bridged-tied load
115mW (Typ) Output Power with Stereo 32
(BTL) with 1% THD+N and 115mW (typ) per channel
BTL Loads
of continuous average power into stereo 32
Ω BTL
loads with 0.5% THD+N, using a 5V power supply.
SPI Programmable 32 Step Digital Volume
Control
The LM4855 features a 32 step digital volume control
Eight Distinct Output Modes
and eight distinct output modes. The digital volume
control and output modes are programmed through a
DSBGA and WQFN Surface Mount Packaging
three-wire SPI serial control interface, that allows
"Click and Pop" Suppression Circuitry
flexibility in routing and mixing audio channels.
Thermal Shutdown Protection
The LM4855 is designed for cellular phone, PDA, and
Low Shutdown Current (0.1uA, Typ)
other portable handheld applications. It delivers high
quality output power from a surface-mount package
KEY SPECIFICATIONS
and requires only six external components.
THD+N at 1kHz, 1.1W into 8
Ω BTL: 1.0% (Typ)
The industry leading DSBGA package only utilizes
2mm x 2.3mm of PCB space, making the LM4855 the
THD+N at 1kHz, 115mW into 32
Ω BTL: 0.5%
most space efficient audio sub system available
(Typ)
today.
Single Supply Operation: 2.6 to 5.0V
APPLICATIONS
Moblie Phones
PDAs
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2002–2013, Texas Instruments Incorporated
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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