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參數資料
| 型號： | LM4912 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Stereo 40mW Low Noise Headphone Amplifier |
| 中文描述： | 立體聲耳機40mW的低噪聲放大器 |
| 文件頁數： | 1/14頁 |
| 文件大小： | 699K |
| 代理商： | LM4912 |
LM4912
Stereo 40mW Low Noise Headphone Amplifier
General Description
The LM4912 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 form 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 LM4912 does not require
bootstrap capacitors or snubber networks, it is optimally
suited for low-power portable systems.
The LM4912 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 LM4912 features an internal thermal
shutdown protection mechanism.
The LM4912 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
n
Output Noise, 20Hz to 20kHz, A-weighted
65dB (typ)
25mW (typ)
40mW (typ)
1.0μA (max)
1mV (max)
10μV (typ)
Features
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 (10ms) with less than
1mV change on outputs
n
2.0V - 5.5V operation
n
Ultra low noise
n
Operation at low supply voltages
Applications
n
Portable CD players
n
PDAs
n
Portable electronics devices
Typical Application
Boomer
is a registered trademark of National Semiconductor Corporation.
20048180
FIGURE 1. Typical Capacitive Coupled Output Configuration Circuit
June 2003
L
2003 National Semiconductor Corporation
DS200481
www.national.com
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| LM4912MM | Stereo 40mW Low Noise Headphone Amplifier |
| LM4913 | 2W Monaural, 90mW Stereo Headphone Audio Amplifier |
| LM4913MH | 2W Monaural, 90mW Stereo Headphone Audio Amplifier |
| LM4913MM | 2W Monaural, 90mW Stereo Headphone Audio Amplifier |
| LM4917 | Ground-Referenced, 95mW Stereo Headphone Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM49120 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier |
| LM49120TL | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier |
| LM49120TL/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品: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 |
| LM49120TLX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier |
| LM49120TLX/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品: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 |
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