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參數(shù)資料
| 型號： | LM4857GR/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PBGA49 |
| 文件頁數(shù)： | 1/40頁 |
| 文件大?。?/td> | 1948K |
| 代理商： | LM4857GR/NOPB |
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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
2C 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 POUT, Stereo Loudspeakers, 4
, 5V,
1% THD+N (LM4857SP)
1.6W (typ)
j POUT, Stereo Loudspeakers, 8
, 5V,
1% THD+N
1.2W (typ)
j POUT, Stereo Headphones, 32
, 5V,
1% THD+N
75mW (typ)
j POUT, Mono Earpiece, 32
, 5V,
1% THD+N
100mW (typ)
j POUT, Stereo Loudspeakers, 8
, 3.3V,
1% THD+N
495mW (typ)
j POUT, Stereo Headphones, 32
, 3.3V,
1% THD+N
33mW (typ)
j POUT, Mono Earpiece, 32
, 3.3V,
1% THD+N
43mW (typ)
j Shutdown Current
0.06A (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
2C 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.
December 2004
LM4857
Stereo
1.2W
Audio
Sub-system
with
3D
Enhancement
2004 National Semiconductor Corporation
DS200797
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4858MM/NOPB | 1.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| LM4858LD/NOPB | 1.7 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO14 |
| LM4860MDA | 1.15 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| LM4860MWA | 1.15 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| LM4861MWA | 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(fēng)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(biāo)準(zhǔn)包裝:1 系列:- |
| LM4857ITLX/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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4857SP | 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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