LM48824 Datasheet | Texas Instruments

.ti. SNAS479D - MARCH 2009 - REVISED MAY 2013 Class G Headphone Amplifier with I2C Volume Control Check for Samples: LM48824 Features - 2 Class G Power Savings - Ground Referenced Headphone Outputs - Eliminates Output Coupling Capacitors - mon-Mode Sense - I2C Volume and Mode Control - High Output Impedance in Shutdown - Differential Inputs - Advanced Click-and-Pop Suppression - Low Supply Current - Low THD Mode Option APPLICATIONS - Mobile Phones, PDAs, MP3 Players - Portable Electronic Devices, Notebook PCs KEY SPECIFICATIONS - Quiescent Power Supply Current at 3.6V: 0.9m A (typ) - Output Power/Channel at VDD = 3.6V (RL = 16Ω, THD+N ≤ 1%): 37 m W (Typ) - Output Power/Channel at VDD = 3.6V (RL = 32Ω, THD+N ≤ 1%): 29 m W (Typ) - PSRR at 217Hz: 100 d B (Typ) - Shutdown Current: 2.5 μA (Typ) DESCRIPTION The LM48824 is a Class G, ground-referenced stereo headphone amplifier designed for portable devices. The LM48824 Features TI’s ground-referenced architecture, which eliminates the large DC blocking capacitors required by traditional headphone amplifiers, saving board space and minimizing system cost. The LM48824 takes advantage of TI’s patent-pending Class G architecture offering power savings pared to a traditional Class AB headphone amplifier. Additionally, output noise is improved by mon-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...