LM49450SQEVAL/NOPB

LM49450 www.ti.com SNAS440D – FEBRUARY 2008 – REVISED MAY 2013 LM49450 Boomer ™ I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio SubSystem with Ground Referenced Headphone Amplifier, 3D Enhancement, and Headphone Sense Check for Samples: LM49450 FEATURES KEY SPECIFICATIONS • • • • • 1 23 • • • • • • • • • • • • • • 24–Bit Stereo DAC Stereo Filterless Class D Operation Selectable Spread Spectrum Mode Reduces EMI Ground Referenced Headphone Amplifiers with 100dB SNR I2S Compatible Audio Interface Audio Sample Rates up to 192kHz TI’s 3D Enhancement 32-Step Digital Volume Control I2C-Compatible Control Interface Headphone Sense Input Stereo Analog Line Inputs Output Short Circuit Protection Thermal Overload Protection Minimum External Components Click and Pop Suppression Micro-Power Shutdown Available in Space-Saving 32-Pin WQFN Package APPLICATIONS • • • • • • Portable Media Players Portable Navigation Devices Multi-Media Monitors Laptops Portable Gaming Devices Mobile Handsets • • • • • • SNR at Headphone Output: 102dBA (typ) Speaker Amplifier Efficiency at 3.6V, 650mW/Channel into 8Ω: 87% (typ) Speaker Amplifier Efficiency at 5V, 1.1W/Channel into 8Ω: 80% (typ) Quiescent Power Supply Current Line Inputs: – Speaker Mode at LSVDD = 3.6V: 7.5mA (typ) – Headphone Mode at HPVDD = 2.5V: 5.3mA (typ) Output Power/Channel Speaker at LSVDD = 5V: – RL = 4Ω, THD+N ≤ 10%: 2.5W (typ) – RL = 8Ω, THD+N ≤ 1%: 1.25W (typ) Headphone at HPVDD = 2.5V: – RL = 16Ω, THD+N ≤ 1%: 34mW (typ) – RL = 32Ω, THD+N ≤ 1%: 36mW (typ) PSRR at 1kHz – Speaker Mode: 67dB ( typ) – Headphone Mode: 77dB (typ) Shutdown current: 0.02μA (typ) DESCRIPTION The LM49450 is a fully integrated audio subsystem designed for portable media player applications. The LM49450 combines a 24-bit I2S digital-to-analog converter (DAC), 2.5W/channel stereo Class D speaker drivers, 36mW stereo ground referenced headphone drivers, volume control, and TI’s unique 3D sound enhancement into a single device. 1 2 3 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. is a trademark of ~ Texas Instruments. All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2008–2013, Texas Instruments Incorporated LM49450 SNAS440D – FEBRUARY 2008 – REVISED MAY 2013 www.ti.com DESCRIPTION (CONTINUED) The filterless Class D amplifiers deliver 1.25W/channel into an 8Ω load with