參數(shù)資料
型號： LM4857
廠商： National Semiconductor Corporation
英文描述： Stereo 1.2W Audio Sub-system with 3D Enhancement
中文描述： 1.2W的立體聲音頻子系統(tǒng)三維增強系統(tǒng)
文件頁數(shù)： 1/38頁
文件大?。?/td> 1517K
代理商： LM4857
LM4857
Stereo 1.2W Audio Sub-system with 3D Enhancement
General Description
The LM4857 is an integrated audio sub-system designed for
stereo cell phone applications. Operating on a 3.3V supply, it
combines a stereo speaker amplifier delivering 495mW per
channel into an 8
load, a stereo headphone amplifier de-
livering 33mW per channel into a 32
load, a mono earpiece
amplifier delivering 43mW into a 32
load, and a line output
for an external powered handsfree speaker. It integrates the
audio amplifiers, volume control, mixer, power management
control, and National 3D enhancement all into a single pack-
age. In addition, the LM4857 routes and mixes the stereo
and mono inputs into 16 distinct output modes. The LM4857
is controlled through an I
2
C compatible interface. Other fea-
tures include an ultra-low current shutdown mode and ther-
mal 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 ITL package and a
28–lead LLP package.
Key Specifications
j
P
OUT
, Stereo Loudspeakers, 4
, 5V,
1% THD+N (LM4857SP)
j
P
OUT
, Stereo Loudspeakers, 8
, 5V,
1% THD+N
j
P
OUT
, Stereo Headphones, 32
, 5V,
1% THD+N
j
P
OUT
, Mono Earpiece, 32
, 5V,
1% THD+N
j
P
OUT
, Stereo Loudspeakers, 8
, 3.3V,
1% THD+N
j
P
OUT
, Stereo Headphones, 32
, 3.3V,
1% THD+N
j
P
OUT
, Mono Earpiece, 32
, 3.3V,
1% THD+N
j
Shutdown Current
1.6W (typ)
1.2W (typ)
75mW (typ)
100mW (typ)
495mW (typ)
33mW (typ)
43mW (typ)
0.06μA (typ)
Features
n
Stereo speaker amplifier
n
Stereo headphone amplifier
n
Mono earpiece amplifier
n
Mono Line Output for external handsfree carkit
n
Independent Left, Right, and Mono volume controls
n
National 3D enhancement
n
I
2
C compatible interface
n
Ultra low shutdown current
n
Click and Pop Suppression circuit
n
16 distinct output modes
n
Thermal Shutdown Protection
n
Available in micro SMD and LLP packages
Applications
n
Cell Phones
n
PDAs
n
Portable Gaming Devices
n
Internet Appliances
n
Portable DVD/CD/AAC/MP3 players
Boomer
is a registered trademark of National Semiconductor Corporation.
June 2004
L
2004 National Semiconductor Corporation
DS200797
www.national.com
相關(guān)PDF資料
PDF描述
LM4857GR Stereo 1.2W Audio Sub-system with 3D Enhancement
LM4857ITL Stereo 1.2W Audio Sub-system with 3D Enhancement
LM4857SP Stereo 1.2W Audio Sub-system with 3D Enhancement
LM4859 Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:47; Connector Shell Size:40; Connecting Termination:Crimp; Circular Shell Style:Wall Mount Receptacle; Body Style:Straight
LM4870 1.1W Audio Power Amplifier with Shutdown Mode
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4857_05 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Stereo 1.2W Audio Sub-system with 3D Enhancement
LM4857GR 功能描述:IC AUDIO SUBSYSTEM W/3D 49UBGA RoHS:否 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR)
LM4857ITL 制造商:Texas Instruments 功能描述:1.2W STEREO SUBSYST 3D SMD 4857
LM4857ITL/NOPB 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
LM4857ITLBD 功能描述:BOARD EVALUATION LM4857ITL RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:-
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