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參數資料
| 型號： | LM4930 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Audio Subsystem with Stereo Headphone & Mono Speaker Amplifiers |
| 中文描述： | 音頻子系統的立體聲耳機 |
| 文件頁數： | 1/33頁 |
| 文件大?。?/td> | 966K |
| 代理商： | LM4930 |
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LM4930
Audio Subsystem with Stereo Headphone & Mono
Speaker Amplifiers
General Description
The LM4930 is an integrated audio subsystem that supports
voice and digital audio functions. The LM4930 includes a
high quality I
2
S input stereo DAC, a voice band codec, a
stereo headphone amplifier and a high-power mono speaker
amplifier. It is primarily designed for demanding applications
in mobile phones and other portable devices.
The LM4930 features an I
2
S serial interface for full range
audio, a 16-bit PCM bi-directional serial interface for the
voice band codec and an two-wire interface for control. The
full range music path features an SNR of 86dB with a 16-bit
48kHz input. The stereo DAC can also be used while the
voice codec is in use. The headphone amplifier delivers
25mW
to a 32
single-ended stereo load with less than
0.5% distortion (THD+N) when AV
= 3V. The mono
speaker amplifier delivers up to 300mW into an 8
load with
less than 2% distortion when AV
DD
= 3V.
The LM4930 employs advanced techniques to reduce power
consumption, to reduce controller overhead and to eliminate
click and pop. Boomer audio power amplifiers were de-
signed specifically to provide high quality output power with
a minimal amount of external components. It is, therefore,
ideally suited for mobile phone and other low voltage appli-
cations where minimal power consumption is a primary re-
quirement.
Key Specifications
j
P
H/P OUT
at AV
DD
= 3.0V, 32
0.5% THD+N
j
P
LS OUT
at AV
DD
= 3.0V, 8
2% THD+N
j
Supply voltage range
DV
DD
(Note 8)
AV
DD
(Note 8)
j
Total shutdown current
j
PSRR at 217Hz, AV
DD
= 3V
25mW (typ)
300mW (typ)
2.6V to 4.5V
2.6V to 5.5V
2μA (typ)
50dB (typ)
Features
n
16-bit resolution 48kHz stereo DAC
n
16-bit resolution 8kHz voice codec
n
I
2
S digital audio data serial interface
n
Two-wire serial control interface
n
PCM voice audio data serial interface
n
25mW/channel stereo headphone amplifier
n
300mW mono 8
amplifier (at AV
DD
= 3.0V)
n
32-step volume control for audio output amplifiers
n
No snubber networks or bootstrap capacitors are
required by the headphone or hands-free amplifiers
n
Digital sidetone generation with adjustable attenuation
n
Gain controllable headphone amp, mono BTL amp, mic
preamp
n
Available in the 36 bump micro SMD package
Applications
n
Mobile Phones
n
Mobile/low power audio appliances
n
PDAs
Boomer
is a registered trademark of National Semiconductor Corporation.
July 2003
L
2003 National Semiconductor Corporation
DS200720
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM4935 | Audio Sub-System with Dual-Mode Stereo Headphone and Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC |
| LM4935WL | Audio Sub-System with Dual-Mode Stereo Headphone and Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC |
| LM4935WLX | Audio Sub-System with Dual-Mode Stereo Headphone and Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC |
| LM4936 | Stereo 2W Audio Power Amplifiers with Volume Control and Selectable Control Interface (SPI or I2C) |
| LM4951 | Wide Voltage Range 1.8 Watt Audio Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4930_04 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Audio Subsystem with Stereo Headphone & Mono Speaker Amplifiers |
| LM4930ITL | 制造商:Texas Instruments 功能描述:Audio Amp Headphone/Microphone/Speaker 1-CH Mono/2-CH Stereo 1W Class-AB 36-Pin uSMD T/R |
| LM4930ITL/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 |
| LM4930ITLX | 制造商:Texas Instruments 功能描述:Audio Amp Headphone/Microphone/Speaker 1-CH Mono/2-CH Stereo 1W Class-AB 36-Pin uSMD T/R |
| LM4930ITLX/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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