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LM4857 Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza LM4857
Descripción Electrónicos  Stereo 1.2W Audio Sub-system
Download  39 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

LM4857 Datasheet(HTML) 1 Page - Texas Instruments

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LM4857
www.ti.com
SNAS229I – OCTOBER 2003 – REVISED APRIL 2013
LM4857
Stereo 1.2W Audio Sub-system with 3D
Enhancement
Check for Samples: LM4857
1
FEATURES
KEY SPECIFICATIONS
2
Stereo Speaker Amplifier
POUT, Stereo Loudspeakers, 4
Ω, 5V, 1%
THD+N (LM4857SP) 1.6W (typ)
Stereo Headphone Amplifier
POUT, Stereo Loudspeakers, 8
Ω, 5V, 1%
Mono Earpiece Amplifier
THD+N 1.2W (typ)
Mono Line Output for External Handsfree
POUT, Stereo Headphones, 32
Ω, 5V, 1%
Carkit
THD+N 75mW (typ)
Independent Left, Right, and Mono Volume
POUT, Mono Earpiece, 32
Ω, 5V, 1% THD+N
Controls
100mW (typ)
TI 3D Enhancement
POUT, Stereo Loudspeakers, 8
Ω, 3.3V, 1%
I2C Compatible Interface
THD+N 495mW (typ)
Ultra low Shutdown Current
POUT, Stereo Headphones, 32
Ω, 3.3V, 1%
Click and Pop Suppression Circuit
THD+N 33mW (typ)
16 distinct Output Modes
POUT, Mono Earpiece, 32
Ω, 3.3V, 1% THD+N
Thermal Shutdown Protection
43mW (typ)
Available in DSBGA and UQFN packages
Shutdown Current 0.06
μA (typ)
APPLICATIONS
DESCRIPTION
The LM4857 is an integrated audio sub-system
Cell Phones
designed
for
stereo
cell
phone
applications.
PDAs
Operating on a 3.3V supply, it combines a stereo
Portable Gaming Devices
speaker amplifier delivering 495mW per channel into
Internet Appliances
an 8
Ω load, a stereo headphone amplifier delivering
33mW per channel into a 32
Ω load, a mono earpiece
Portable DVD/CD/AAC/MP3 players
amplifier delivering 43mW into a 32
Ω load, and a line
output for an external powered handsfree speaker. It
integrates the audio amplifiers, volume control, mixer,
power management control, and TI 3D enhancement
all into a single package. In addition, the LM4857
routes and mixes the stereo and mono inputs into 16
distinct output modes. The LM4857 is controlled
through an I2C compatible interface. Other features
include an ultra-low current shutdown mode and
thermal shutdown protection.
Boomer
audio
power
amplifiers
are
designed
specifically to provide high quality output power with a
minimal amount of external components.
The LM4857 is available in a 30-bump DSBGA
package and a 28–lead UQFN package.
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 © 2003–2013, 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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