LM49100 Datasheet | National Semiconductor

Description The LM49100 is a fully integrated audio subsystem capable of delivering 1.275W of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N and with a 5V power supply. The LM49100 also has a stereo true-ground headphone amplifier capable of 50m W per channel of continuous average power into a 32Ω single-ended (SE) loads with 1% THD+N. The LM49100 has three input channels. One pair of SE inputs can be used with a stereo signal. The other input channel is fully differential and may be used with a mono input signal. The LM49100 features a 32-step digital volume control and ten distinct output modes. The mixer, volume control, and device mode select are controlled through an I2C patible interface. Thermal overload protection prevent the device from being damaged during fault conditions. Superior click and pop suppression eliminates audible transients on power-up/down and during shutdown. Key Specifications -  Power Output at VDD = 5V:   Speaker:   RL = 8Ω, THD+N ≤ 1%   Headphone (VDDHP = 2.8V):   RL = 32Ω, THD+N ≤ 1% -  Shutdown current 1.275W 50m W 0.01µA Features - - - - - - - - - - - - Mono and stereo inputs Thermal Overload Protection True-ground Headphone Drivers I2C Control Interface Input mute attenuation 2nd Stage headphone attenuator 32-step digital volume control 10 Operating Modes Minimum external ponents Click and Pop suppression Micro-power shutdown Available in space-saving 3mm x 3mm 25 bump GR package - RF Suppression Applications - - - - Mobile Phones PDAs Laptops Portable Electronics Boomer® is a registered trademark of National Semiconductor Corporation. © 2007 National Semiconductor Corporation .national. .. Typical Application 300015o4 FIGURE 1. Typical Audio Amplifier Application Circuit .national. .. Connection Diagrams GR Package 3mm × 3mm × 1mm 300015o3 Top View Order Number LM49100GR See NS Package Number GRA25A GR Package Marking 300015f6 Top View XY - 2 Digit datecode...