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參數(shù)資料
| 型號： | LM4931 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Audio Subsystem with Mono High Efficiency Loudspeaker and Stereo Headphone Amplifiers |
| 中文描述： | 與單聲道音頻子系統(tǒng)高效揚聲器和立體聲耳機放大器 |
| 文件頁數(shù)： | 1/47頁 |
| 文件大?。?/td> | 1640K |
| 代理商： | LM4931 |
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LM4931
Audio Subsystem with Mono High Efficiency
Loudspeaker and Stereo Headphone Amplifiers
General Description
The LM4931 is an integrated audio subsystem that supports
voice and digital audio functions. The LM4931 includes a
high quality stereo DAC, voice band codec, a stereo head-
phone amplifier and a high-power high efficiency mono
speaker amplifier. It is primarily designed for demanding
applications in mobile phones and other portable devices.
The LM4931 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 I
2
C/SPI compatible interface for
control. The full range music path features an SNR of 86dB
with an 18-bit 48kHz input. The headphone amplifier delivers
at least 26mW
to a 32
single-ended stereo load with
less than 1% distortion (THD+N) when AV
= 3.3V
. The
mono speaker amplifier delivers up to 570mW
RMS
into an 8
load with less than 1% distortion when AV
DD
DC
.
The LM4931 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, PCB area, and
cost are primary requirements.
Key Specifications
j
P
LS OUT
at AV
DD
= 5V, 8
1% THD+N
j
P
LS OUT
at AV
DD
= 3.3V, 8
1% THD+N
j
P
H/P OUT
at AV
DD
= 5V & AV
DD
= 3.3V, 32
1% THD+N
j
Supply voltage range
DV
DD
AV
DD
(Note 8)
j
Shutdown current
j
PSRR at 217Hz, AV
DD
= 3V
j
SNR (Voice Codec)
j
SNR (Audio DAC)
1.1W (typ)
570mW (typ)
26mW (typ)
2.7V to 4.0V
2.7V to 5.0V
1.1μA (typ)
62dB (typ)
75dB (typ)
86dB (typ)
Features
n
18-bit 44.1kHz or 48kHz stereo DAC
n
16-bit 8kHz , 12kHz , 16kHz, or 24kHz voice-band
codec
n
PLL for operation from common system clocks
n
Either I
2
C or SPI compatible serial interface
n
I
2
S digital audio data serial interface
n
PCM voice audio data serial interface
n
Differential analog microphone input
n
26mW/channel stereo headphone amplifier
n
570mW mono high efficiency BTL 8
amplifier
n
32-step volume control for audio output amplifiers with
1.5dB step size.
n
Unity-gain stable headphone amplifiers
n
No snubber networks or bootstrap capacitors are
required by the headphone or hands-free amplifiers
n
Adjustable digital side-tone attenuation
n
16-step volume control for microphone preamp with 2dB
step size
n
Configurable GPIO/Status Port
n
Available in the 42 bump micro-SMD package
Applications
n
2.5 and 3G Mobile Phones and Multimedia Terminals
n
PDAs, Internet Appliances and Portable Gaming
n
Portable DVD/CD/AAC/MP3 Players
n
Digital Cameras and Toys
Boomer
is a registered trademark of National Semiconductor Corporation.
June 2004
L
A
2004 National Semiconductor Corporation
DS201009
www.national.com
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM4931_06 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Audio Subsystem with Mono High Efficiency Loudsperker and Stereo Headphone Amplifiers |
| LM4931ITL/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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4931ITLBD | 功能描述:BOARD EVALUATION LM4931ITL RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| LM49321 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression |
| LM49321RL | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression |
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