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LM4857 Datasheet(PDF) 1 Page - Texas Instruments |
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LM4857 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 39 page LM4857 www.ti.com SNAS229I – OCTOBER 2003 – REVISED APRIL 2013 LM4857 Stereo 1.2W Audio Sub-system with 3D Enhancement Check for Samples: LM4857 1 FEATURES KEY SPECIFICATIONS 2 • Stereo Speaker Amplifier • POUT, Stereo Loudspeakers, 4 Ω, 5V, 1% THD+N (LM4857SP) 1.6W (typ) • Stereo Headphone Amplifier • POUT, Stereo Loudspeakers, 8 Ω, 5V, 1% • Mono Earpiece Amplifier THD+N 1.2W (typ) • Mono Line Output for External Handsfree • POUT, Stereo Headphones, 32 Ω, 5V, 1% Carkit THD+N 75mW (typ) • Independent Left, Right, and Mono Volume • POUT, Mono Earpiece, 32 Ω, 5V, 1% THD+N Controls 100mW (typ) • TI 3D Enhancement • POUT, Stereo Loudspeakers, 8 Ω, 3.3V, 1% • I2C Compatible Interface THD+N 495mW (typ) • Ultra low Shutdown Current • POUT, Stereo Headphones, 32 Ω, 3.3V, 1% • Click and Pop Suppression Circuit THD+N 33mW (typ) • 16 distinct Output Modes • POUT, Mono Earpiece, 32 Ω, 3.3V, 1% THD+N • Thermal Shutdown Protection 43mW (typ) • Available in DSBGA and UQFN packages • Shutdown Current 0.06 μA (typ) APPLICATIONS DESCRIPTION The LM4857 is an integrated audio sub-system • Cell Phones designed for stereo cell phone applications. • PDAs Operating on a 3.3V supply, it combines a stereo • Portable Gaming Devices speaker amplifier delivering 495mW per channel into • Internet Appliances an 8 Ω load, a stereo headphone amplifier delivering 33mW per channel into a 32 Ω load, a mono earpiece • Portable DVD/CD/AAC/MP3 players amplifier delivering 43mW into a 32 Ω load, and a line output for an external powered handsfree speaker. It integrates the audio amplifiers, volume control, mixer, power management control, and TI 3D enhancement all into a single package. In addition, the LM4857 routes and mixes the stereo and mono inputs into 16 distinct output modes. The LM4857 is controlled through an I2C compatible interface. Other features include an ultra-low current shutdown mode and thermal shutdown protection. Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components. The LM4857 is available in a 30-bump DSBGA package and a 28–lead UQFN package. 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 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2003–2013, 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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