LM4911Q

LM4911, LM4911Q www.ti.com SNAS152M – MAY 2004 – REVISED JUNE 2011 LM4911/LM4911Q Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output Check for Samples: LM4911, LM4911Q FEATURES 1 2 OCL or Capacitively Coupled Outputs (Patent Pending) External Gain-Setting Capability Available in Space-Saving VSSOP and WSON Packages Ultra Low Current Shutdown Mode Mute Mode Allows Fast Turn-on (1ms) with Less Than 1mV Change on Outputs 2V - 5.5V Operation Ultra Low Noise LM4911QMM is an Automotive Grade Product that is AEC-Q100 Grade 2 Qualified. APPLICATIONS Portable CD Players PDAs Portable Electronics Devices Automotive KEY SPECIFICATIONS PSRR at 217Hz and 1kHz 65 dB (typ) Output Power at 1kHz with VDD = 2.4V, 1% THD+N into a 16Ω Load 25 mW (typ) Output Power at 1kHz with VDD = 3V, 1% THD+N into a 16Ω Load 40 mW (typ) Shutdown Current 2.0 µA (max) Output Voltage Change on Release from Shutdown VDD = 2.4V, RL = 16Ω (C-Coupled) 1 mV (max) Mute Current 100 µA (max) DESCRIPTION The LM4911/LM4911Q is an stereo audio power amplifier capable of delivering 40mW per channel of continuous average power into a 16Ω load or 25mW per channel into a 32Ω load at 1% THD+N from a 3V power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4911/LM4911Q does not require bootstrap capacitors or snubber networks, it is opti...