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LM4855 Datasheet Preview

LM4855 Datasheet

Integrated Audio Amplifier

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




etcTI

LM4855 Datasheet Preview

LM4855 Datasheet

Integrated Audio Amplifier

No Preview Available !

LM4855
SNAS164C – JUNE 2002 – REVISED MAY 2013
Typical Application
www.ti.com
Figure 1. Typical Audio Amplifier Application Circuit
2
Submit Documentation Feedback
Product Folder Links: LM4855
Copyright © 2002–2013, Texas Instruments Incorporated



Part Number LM4855
Description Integrated Audio Amplifier
Maker etcTI
Total Page 3 Pages
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LM4855 Datasheet PDF





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