LM48822TLX/NOPB

LM48822, LM48822TLEVAL www.ti.com SNAS456C – MAY 2008 – REVISED MAY 2013 LM48822 Boomer ™ Ground-Referenced, Ultra High PSRR, Ultra Low Noise, 35mW/Channel Stereo Headphone Amplifier with Common Mode Sense, and I2C Volume Control Check for Samples: LM48822, LM48822TLEVAL FEATURES DESCRIPTION • The LM48822 is a single supply, ground-referenced stereo headphone amplifier designed for portable devices, such as cell phones, where board space is at a premium. The LM48822 features TI’s groundreferenced architecture, which eliminates the large DC blocking capacitor required by traditional headphone amplifiers, saving board space and minimizing system cost. 1 23 • • • • • • • • • • Ground Referenced Outputs – Eliminates Output Coupling Capacitors Common-Mode Sense Ultra-High PSRR I2C Volume and Mode Control High Output Impedance in Shutdown Differential Inputs Advanced Click-and-Pop Suppression Low Supply Current Minimum External Components Micro-Power Shutdown Available in Space-Saving 16-Bump DSBGA Package APPLICATIONS • • • • • Mobile Phones PDAs Notebook PCs Portable Electronic Devices MP3 Players KEY SPECIFICATIONS • • • • • Output Power/Channel at VDD = 3.6V – RL = 16Ω, THD+N ≤ 1%: 35mW (typ) Output Power/Channel at VDD = 3.6V – RL = 32Ω, THD+N ≤ 1%: 40mW (typ) Quiescent Power Supply Current at 3.6V: 3.5mA (typ) PSRR at 217Hz: 110dB (typ) Shutdown Current: 0.06μA (typ) The LM48822 features common-mode sensing that corrects for any differences between the amplifier ground and the potential at the headphone return terminal, minimizing noise created by any ground mismatches. The LM48822 delivers 35mW/channel into a 16Ω load with