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LM4930 Fiches technique(PDF) 1 Page - Texas Instruments

No de pièce LM4930
Description  Audio Power Amplifier Series Audio Subsystem with Stereo Headphone & Mono Speaker Amplifiers
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LM4930 Fiches technique(HTML) 1 Page - Texas Instruments

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LM4930
www.ti.com
SNAS212B – MAY 2004 – REVISED SEPTEMBER 2004
LM4930 Boomer™ Audio Power Amplifier Series Audio Subsystem with Stereo
Headphone & Mono Speaker Amplifiers
Check for Samples: LM4930
1
FEATURES
amplifiers
Digital sidetone generation with adjustable
23
16-bit resolution 48kHz stereo DAC
attenuation
16-bit resolution 8kHz voice codec
Gain controllable headphone amp, mono BTL
I2S digital audio data serial interface
amp, mic preamp
Two-wire serial control interface
Available in the 36–bump micro SMD and
PCM voice audio data serial interface
44–lead LLP packages
25mW/channel stereo headphone amplifier
330mW mono 8
Ω amplifier (at AVDD = 3.0V)
APPLICATIONS
32-step volume control for audio output
Mobile Phones
amplifiers
Mobile/low power audio appliances
No snubber networks or bootstrap capacitors
PDAs
are required by the headphone or hands-free
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.
The LM4930 features an I2S 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 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.
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.
Table 1. Key Specifications
VALUE
UNIT
PLS OUT at AVDD = 5.0V, 8Ω
1% THD+N
1
W (typ)
PLS OUT at AVDD = 3.0V, 8Ω
1% THD+N
330
mW (typ)
PH/P OUT at AVDD = 3.0V, 32Ω
0.5% THD+N
25
mW (typ)
Supply voltage range
DVDD
(1)
2.6V to 4.5
V
AVDD
(1)
2.6V to 5.5
V
(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.
2
Boomer is a trademark of Texas Instruments Incorporated.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2004, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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