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參數(shù)資料
| 型號： | LM4831 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Multimedia Computer Audio Chip |
| 中文描述： | 多媒體計(jì)算機(jī)音頻芯片 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 575K |
| 代理商： | LM4831 |
LM4831
Multimedia Computer Audio Chip
General Description
The LM4831 is a monolithic integrated circuit that provides a
stereo three input mixer, two stereo input analog multiplexer,
a stereo line out and a dual 1W bridged audio power ampli-
fier. In addition, a low noise microphone preamp is included
on-chip.
The LM4831 is ideal for multimedia computers since it incor-
porates an input mixer, analog multiplexer, and configurable
stereo audio power amplifier, as well as a microphone
preamp stage. This combination allows for all of the analog
audio processing to be enclosed in a 44-pin TQFP package.
The LM4831 features an externally controlled, low-power
consumption shutdown mode, as well as both headphone
and docking station modes. To temporarily override the shut-
down mode and allow audio signals to be amplified, the
LM4831 provides four “beep” pins.
Key Specifications
n
THD+N at 1W into 8
n
Microphone Input Referred Noise
n
Supply Current - Bridged Mode
n
Shutdown Current
0.6% (typ)
10μV (typ)
16mA (typ)
2μA (typ)
Features
n
Stereo 1W audio power amplifier
n
“Click and pop” suppression circuitry
n
Stereo three input mixer
n
Shutdown mode
n
Multiple operating modes— bridged, single-ended and
docking station modes
n
Internal mux for switching in/out external filter
n
Beep circuitry for “wake-up” while in shutdown
n
44 Pin TQFP Packaging
Applications
n
Portable and Desktop Computers
Block Diagram
Connection Diagram
Boomer
is a registered trademark of National Semiconductor Corporation.
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
DS100057-1
FIGURE 1. LM4831 Block Diagram
DS100057-3
Top View
Order Number LM4831VF
See NS Package Number VEJ44A
November 1998
L
1998 National Semiconductor Corporation
DS100057
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4832MX | Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound |
| LM4832 | Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound |
| LM4832M | Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound |
| LM4832N | Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound |
| LM4834 | 1.75W Audio Power Amplifier with DC Volume Control and Microphone Preamp |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4831 WAF | 制造商:Texas Instruments 功能描述: |
| LM48310 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Ultra-Low EMI, Filterless, 2.6W, Mono, Class D Audio Power Amplifier with E2S |
| LM48310SD | 制造商:Texas Instruments 功能描述:Audio Amp Speaker 1-CH Mono 2.6W Class-D 10-Pin LLP EP T/R |
| LM48310SD/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 |
| LM48310SDBD | 功能描述:音頻 IC 開發(fā)工具 LM48310SD EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
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