- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358867 > LM4921 (National Semiconductor Corporation) Low Voltage I2S 16-Bit Stereo DAC with Stereo Headphone Power Amplifiers and Volume Control PDF資料下載
參數(shù)資料
| 型號： | LM4921 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Low Voltage I2S 16-Bit Stereo DAC with Stereo Headphone Power Amplifiers and Volume Control |
| 中文描述： | 低電壓的I2S 16位立體聲DAC立體聲耳機功率放大器和音量控制 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大?。?/td> | 849K |
| 代理商： | LM4921 |
LM4921
Low Voltage I
2
S 16-Bit Stereo DAC with Stereo
Headphone Power Amplifiers and Volume Control
General Description
The LM4921 combines a 16-bit resolution stereo I
2
S input
digital-to-analog converter (DAC) with a stereo headphone
audio power amplifier. It is primarily designed for demanding
applications in mobile phones and other portable communi-
cation device applications. The LM4921 features an I
2
S
serial interface for the digital audio information and a 16-bit
SPI serial interface for internal register control and commu-
nication. With AV
and DV
DD
= 3.0V
and driving a 32
single-ended load to a 26mW
output level the distortion
(THD+N) of the LM4921 will be less than 0.5%. The LM4921
also features a programmable 32-step digital volume control
accessed through an SPI interface.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. It is, therefore, ideally suited for mo-
bile phone and other low voltage applications where minimal
power consumption is a primary requirement.
The LM4921 features a low-power consumption shutdown
mode, and also has an internal thermal shutdown protection
mechanism.
Key Specifications
j
PSRR at 217Hz, A/DV
DD
= 3V, (Fig. 1)
j
P
OUT
at AV
DD
= 3.0V, 32
<
0.05% THD
<
0.5% THD
j
Supply voltage range
DV
DD
AV
DD
(Note 8)
j
Shutdown current
52dB (typ)
13mW (typ)
26mW (typ)
2.6V to 5.0V
2.6V to 5.5V
1μA (typ)
Features
n
16-bit resolution stereo DAC
n
I
2
S digital audio data serial interface
n
SPI serial interface (control register)
n
Volume Control (32 steps; 1.5 dB increments)
n
Up to 50mW/channel stereo headphone amplifier
n
Zero Crossing Detection for Silent Attenuation Steps
n
2.6V
DC
to 5.0V
DC
digital supply voltage range
n
2.6V
DC
to 5.5V
DC
analog supply voltage range (Note 8)
n
Unity-gain stable headphone amplifiers
n
Available in the 20-bump microSMD package
Applications
n
Mobile phones
n
PDAs
n
Portable electronic devices
Boomer
is a registered trademark of National Semiconductor Corporation.
November 2004
L
2
S
C
2004 National Semiconductor Corporation
DS200486
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4923 | 1.1 Watt Fully Differential Audio Power Amplifier With Shutdown Select |
| LM4923LQ | 1.1 Watt Fully Differential Audio Power Amplifier With Shutdown Select |
| LM4925 | Single Audio Amplifier |
| LM4925MM | Single Audio Amplifier |
| LM4925SD | Single Audio Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4921ITL | 制造商:Texas Instruments 功能描述:16BIT STEREO DAC + AMP SMD 4921 |
| LM4921ITL/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 |
| LM4921ITLEVAL | 功能描述:音頻 IC 開發(fā)工具 LM4921ITL 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 |
| LM4921ITLX | 制造商:Texas Instruments 功能描述:IC,Audio Amplifier,DUAL,BGA,20PIN,PLASTIC |
| LM4921ITLX/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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。