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參數(shù)資料
| 型號： | LM4911 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output |
| 中文描述： | 40mW的功率立體聲耳機(jī)放大器，低噪聲與耦合模式或無需輸出電容可選 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大小： | 923K |
| 代理商： | LM4911 |
LM4911
Stereo 40mW Low Noise Headphone Amplifier with
Selectable Capacitive Coupled or OCL Output
General Description
The LM4911 is an stereo audio power amplifier capable of
delivering 40mW per channel of continuous average power
into a 16
load or 25mW per channel into a 32
load at 1%
THD+N from a 3V power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. Since the LM4911 does not require
bootstrap capacitors or snubber networks, it is optimally
suited for low-power portable systems. In addition, the
LM4911 may be configured for either single-ended capaci-
tively coupled outputs or for OCL outputs (patent pending).
The LM4911 features a low-power consumption shutdown
mode and a power mute mode that allows for faster turn on
time with less than 1mV voltage change at outputs on re-
lease. Additionally, the LM4911 features an internal thermal
shutdown protection mechanism.
The LM4911 is unity gain stable and may be configured with
external gain-setting resistors.
Key Specifications
n
PSRR at 217 Hz and 1kHz
n
Output Power at 1kHz with V
DD
= 2.4V, 1% THD+N into
a 16
load
n
Output Power at 1kHz with V
DD
= 3V, 1% THD+N into a
16
load
n
Shutdown Current
n
Output Voltage change on release from Shutdown
V
DD
= 2.4V, R
L
= 16
(C-Coupled)
n
Mute Current
65dB (typ)
25mW (typ)
40mW (typ)
2.0μA (max)
1mV (max)
100μA (max)
Features
n
OCL or capacitively coupled outputs (patent pending)
n
External gain-setting capability
n
Available in space-saving MSOP package
n
Ultra low current shutdown mode
n
Mute mode allows fast turn-on (1ms) with less than 1mV
change on outputs
n
2V - 5.5V operation
n
Ultra low noise
Applications
n
Portable CD players
n
PDAs
n
Portable electronics devices
Block Diagram
Boomer
is a registered trademark of National Semiconductor Corporation.
20031478
FIGURE 1. Block Diagram
July 2002
L
O
2002 National Semiconductor Corporation
DS200314
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4911MM | Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output |
| LM4915 | Pseudo-Differential Mono Headphone Amplifier with Fixed 6dB Gain |
| LM4916 | 1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifier |
| LM4916LD | 1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifier |
| LM4916MM | 1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4911LD | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output |
| LM4911LD/NOPB | 功能描述:IC AMP AUDIO PWR .145W AB 10LLP RoHS:是 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(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)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(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，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) |
| LM4911LDX | 功能描述:IC AMP AUDIO PWR .145W AB 10LLP RoHS:是 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(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)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(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，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) |
| LM4911MM | 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 |
| LM4911MM/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 |
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