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LM49352 数据表(PDF) 1 Page - Texas Instruments |
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LM49352 数据表(HTML) 1 Page - Texas Instruments |
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1 / 106 page  LM49352 www.ti.com SNAS467E – MARCH 2009 – REVISED MARCH 2013 LM49352 Boomer™ Mono Class D Audio Codec Subsystem with Ground Referenced Headphone Amplifiers, Earpiece Driver, and Audio DSP Check for Samples: LM49352 1 FEATURES 23 • Ultra Efficient, Spread Spectrum Class D • Micro-Power Shutdown Mode Loudspeaker Amplifier that Operates at 93% • Available in the 3.3 x 3.3 mm 36 bump DSBGA Efficiency package • Low Voltage, True Ground Headphone Amplifier Operation APPLICATIONS • High Performance 103dB SNR Stereo DAC • Smart Phones • High Performance 97dB SNR Stereo ADC • Mobile Phones and VOIP Phones • Up to 96kHz Stereo Audio Playback • Portable GPS Navigator and Portable Gaming Devices • Up to 48kHz Stereo Recording • Portable DVD/CD/AAC/MP3/MP4 Players • Dual Bidirectional I2S or PCM Compatible Audio Interfaces • Digital Cameras/Camcorders • Read/Write I2C Compatible Control Interface KEY SPECIFICATIONS • Flexible Digital Mixer with Sample Rate Conversion • Class D Amplifier Efficiency 93% (Typ) • Sigma-Delta PLL Clock Network that Supports • PEP at A_VDD = 3.3V, 32Ω, 1% THD 58mW (Typ) System Clocks up to 50MHz Including 13MHz, • PHP at HP_VDD = 2.8V, Stereo 32Ω, 1% THD 19.2MHz, and 26MHz 65mW/ch (Typ) • Dual stereo 5 band parametric equalizers • PLS at LS_VDD = 5V, 8Ω, 1% THD 1.4W (Typ) • Cascadable DSP Effects that Allow Stereo 10 • PLS at LS_VDD = 4.2V, 8Ω, 1% THD 970 mW Band Parametric Equalization (Typ) • ALC/Limiter/Compressor on Both DAC and • PLS at LS_VDD = 3.3V, 8Ω, 1% THD 590 mW ADC Paths (Typ) • Dedicated Earpiece Speaker Amplifier • SNR (Stereo DAC at 48kHz) 103 dB (Typ) • Stereo Auxiliary Inputs and Mono Differential • PSRR at 217 Hz, A_VDD = 3.3V, (HP from AUX) Input 100dB (Typ) • Differential Microphone Input with Single- Ended Option DESCRIPTION • Automatic Level Control for Digital Audio The LM49352 is a high performance mixed signal audio subsystem. The LM49352 includes a high Inputs, Mono Differential Input, Microphone quality stereo DAC, a high quality stereo ADC, a Input, and Stereo Auxiliary Inputs stereo headphone amplifier, which supports True • Flexible Audio Routing from Input to Output Ground operation, a low EMI Class D loudspeaker • 16 Step Volume Control for Microphone with amplifier, and an earpiece speaker amplifier. It 2dB Steps combines advanced audio processing, conversion, mixing, and amplification in the smallest possible • 32 Step Volume Control for Auxiliary Inputs in footprint while extending the battery life of feature rich 1.5dB Steps portable devices. • 4 Step Volume Control for Class D Loudspeaker Amplifier • 8 Step Volume Control for Headphone Amplifier 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. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2009–2013, 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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