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LM4930 Fiches technique(PDF) 1 Page - Texas Instruments |
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LM4930 Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 41 page 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. |
Numéro de pièce similaire - LM4930_14 |
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Description similaire - LM4930_14 |
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