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LM4937RL/NOPB Datasheet(PDF) 1 Page - Texas Instruments |
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LM4937RL/NOPB Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 41 page  LM4937 www.ti.com SNAS369J – OCTOBER 2006 – REVISED MAY 2013 LM4937 Audio Sub-System with OCL Stereo Headphone Output and RF Suppression Check for Samples: LM4937 1 FEATURES DESCRIPTION The LM4937 is an integrated audio sub-system 234 • 18-Bit Stereo DAC designed for mono voice, stereo music cell phones • Multiple Distinct Output Modes connecting to base band processors with mono • Mono Speaker Amplifier differential analog voice paths. Operating on a 3.3V supply, it combines a mono speaker amplifier • Stereo Headphone Amplifier delivering 520mW into an 8 Ω load, a stereo • Mono Earpiece Amplifier headphone amplifier delivering 36mW per channel • Differential Mono Analog Input into a 32 Ω load, and a mono earpiece amplifier delivering 55mW into a 32 Ω load. It integrates the • Independent Loudspeaker, Headphone and audio amplifiers, volume control, mixer, and power Mono Earpiece Volume Controls management control all into a single package. In • I2C/SPI (Selectable) Compatible Interface addition, the LM4937 routes and mixes the single- • Ultra Low Shutdown Current ended stereo and differential mono inputs into multiple distinct output modes. The LM4937 features • Click and Pop Suppression Circuit an I2S serial interface for full range audio and an I2C ™or SPI compatible interface for control. The full APPLICATIONS range music path features an SNR of 85dB with a • Cell Phones 192kHz playback. • PDAs Boomer™ audio power amplifiers are designed specifically to provide high quality output power with a KEY SPECIFICATIONS minimal amount of external components. • POUT, BTL, 8Ω, 3.3V, 1%: 520 mW (typ) • POUT H/P, 32Ω, 3.3V, 1%: 36 mW (typ) • POUT Mono Earpiece, 32Ω, 1%: 55 mW (typ) • Shutdown current: 0.6µA (typ) • SNR (DAC + Amplifier): 85 dB (typ) 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 I2C is a trademark of NXP. 4 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2006–2013, 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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