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LM4930

更新时间： 2024-11-22 11:11:31
品牌 Logo 应用领域
德州仪器 - TI 放大器
页数 文件大小 规格书
41页 929K
描述
具有立体声耳机和单声道扬声器放大器的音频子系统

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LM4930 数据手册

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LM4930  
www.ti.com  
SNAS212C –JULY 2003–REVISED MAY 2013  
LM4930 Boomer™ Audio Power Amplifier Series Audio Subsystem with Stereo  
Headphone & Mono Speaker Amplifiers  
Check for Samples: LM4930  
1
FEATURES  
DESCRIPTION  
The LM4930 is an integrated audio subsystem that  
supports voice and digital audio functions. The  
LM4930 includes a high quality I2S 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.  
23  
•
16-bit Resolution 48kHz Stereo DAC  
16-bit Resolution 8kHz Voice Codec  
I2S Digital Audio Data Serial Interface  
Two-wire Serial Control Interface  
•
•
•
•
•
•
•
PCM Voice Audio Data Serial Interface  
25mW/channel Stereo Headphone Amplifier  
330mW Mono 8Ω Amplifier (at AVDD = 3.0V)  
The LM4930 features an I2S serial interface for full  
range audio,  
a 16-bit PCM bi-directional serial  
32-step Volume Control for Audio Output  
Amplifiers  
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  
25mWRMS to a 32Ω single-ended stereo load with  
less than 0.5% distortion (THD+N) when AVDD = 3V.  
The mono speaker amplifier delivers up to 330mW  
into an 8Ω load with less than 1% distortion when  
AVDD = 3V.  
•
No Snubber Networks or Bootstrap Capacitors  
are Required by the Headphone or Hands-free  
Amplifiers  
•
•
•
Digital Sidetone Generation with Adjustable  
Attenuation  
Gain Controllable Headphone Amp, Mono BTL  
Amp, Mic Preamp  
The LM4930 employs advanced techniques to reduce  
power consumption, to reduce controller overhead  
and to eliminate click and pop. 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  
mobile phone and other low voltage applications  
where minimal power consumption is a primary  
requirement.  
Available in the 36–bump DSBGA and 44–lead  
WQFN Packages  
APPLICATIONS  
•
•
•
Mobile Phones  
Mobile/low Power Audio Appliances  
PDAs  
KEY SPECIFICATIONS  
•
•
•
•
PLS OUT at AVDD = 5.0V, 8Ω 1% THD+N 1W  
(typ)  
PLS OUT at AVDD = 3.0V, 8Ω 1% THD+N  
330mW (typ)  
PH/P OUT at AVDD = 3.0V, 32Ω 0.5% THD+N  
25mW (typ)  
Supply Voltage Range  
–
–
DVDD(1) 2.6V to 4.5V  
AVDD(1) 2.6V to 5.5V  
•
•
Total Shutdown Current 2μA (typ)  
PSRR at 217Hz, AVDD = 3V 50dB (typ)  
(1) Best operation is achieved by maintaining 3.0V ≤ AVDD ≤ 5.0  
and 3.0V ≤ DVDD ≤ 3.6V. AVDD must be equal to or greater  
than DVDD. for proper operation.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Boomer is a trademark of Texas Instruments Incorporated.  
2
3
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2003–2013, Texas Instruments Incorporated  
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