LM48861 Datasheet | National Semiconductor

Description The LM48861 is a single supply, ground-referenced stereo headphone amplifier. Part of National's Power Wise® product family, the LM48861 consumes only 3m W of power, yet still provides great audio performance. The ground-referenced architecture eliminates the larger DC blocking capacitors required by traditional headphone amplifier's saving board space and reducing cost. The LM48861 features 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 mismatches. The LM48861 delivers 22m W/channel into a 32Ω load with <1% THD+N with a 1.8V supply. Power supply requirements allow operation from 1.2V to 2.8V. High power supply rejection ratio (PSRR), 83d B at 217Hz, allows the device to operate in noisy environments without additional power supply conditioning. A low power shutdown mode reduces supply current consumption to 0.01µA. Superior click and pop suppression eliminates audible transients on power-up/down and during shutdown. The LM48861 is available in an ultra-small 12-bump, 0.4mm pitch, micro SMD package (1.215mm x 1.615mm). Key Specifications -  Output Power/channel at VDD = 1.5V, THD+N = 1% RL = 16Ω RL = 32Ω 12m W (typ) 13m W (typ) -  Output Power/channel at VDD = 1.8V, THD+N = 1% RL = 16Ω RL = 32Ω 24m W (typ) 22m W (typ) 2m A (typ) 83d B (typ) 0.01μA (typ) -  Quiescent Power Supply Current at 1.5V -  PSRR at 217Hz -  Shutdown Current Features - Ground referenced outputs - eliminates output coupling - - - - - - - capacitors mon-mode sensing Advanced click-and-pop suppression Low supply current Minimum external ponents Micro-power shutdown ESD protection of 8k V HBM contact Available in space-saving 12-bump micro SMD package Applications - Mobile Phones - Portable electronic devices - MP3 Players Boomer® is a registered trademark of National Semiconductor Corporation. © 2010 National Semiconductor Corporation .national. .Data...