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參數資料
| 型號： | LM4844 |
| 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三維增強系統 |
| 文件頁數： | 1/21頁 |
| 文件大小： | 983K |
| 代理商： | LM4844 |
LM4844
Stereo 1.2W Audio Sub-system with 3D Enhancement
General Description
The LM4844 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 and a stereo OCL headphone
amplifier delivering 33mW per channel into a 32
load.
It integrates the audio amplifiers, volume control, mixer,
power management control, and National 3D enhancement
all into a single package. In addition, the LM4844 routes and
mixes the stereo and mono inputs into 10 distinct output
modes. The LM4844 is controlled through an I
2
C compatible
interface.
Boomer audio power amplifiers are designed specifically to
provide high quality output power with a minimal amount of
external components.
The LM4844 is available in a very small 2.5mm x 2.9mm
30-bump micro SMD (TL) package.
Key Specifications
j
P
OUT
, Stereo BTL, 8
, 3.3V,
1% THD+N
j
P
OUT
HP, 32
, 3.3V,
1% THD+N
j
Shutdown Current, 3.3V
495mW (typ)
33mW (typ)
0.1μA (typ)
Features
n
Stereo speaker amplifier
n
Stereo OCL headphone amplifier
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
10 distinct output modes
Applications
n
Cell Phones
n
PDAs
n
Portable Gaming Devices
n
Internet Appliances
n
Portable DVD, CD, AAC, and MP3 Players
Block Diagram
Boomer
is a registered trademark of National Semiconductor Corporation.
20153531
FIGURE 1. Audio Sub-system Block Diagram
June 2005
L
2005 National Semiconductor Corporation
DS201535
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM4845 | Output Capacitor-less Audio Subsystem with Programmable National 3D |
| LM4845ITL | Output Capacitor-less Audio Subsystem with Programmable National 3D |
| LM4850 | Mono 1.5 W / Stereo 300 mW Power Amplifier |
| LM4850LD | Mono 1.5 W / Stereo 300 mW Power Amplifier |
| LM4850MM | Mono 1.5 W / Stereo 300 mW Power Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4844_07 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Stereo 1.2W Audio Sub-System with 3D Enhancement |
| LM4844TL/NOPB | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數量:2 DAC 數量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| LM4844TLEVAL | 功能描述:BOARD EVALUATION LM4844TL RoHS:否 類別:編程器，開發系統 >> 評估板 - 音頻放大器 系列:Boomer® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| LM4844TLX/NOPB | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數量:2 DAC 數量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| LM4845 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Output Capacitor-less Audio Subsystem with Programmable National 3D |
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