LM4980

www.DataSheet4U.com LM4980 2 Cell Battery, 1mA, 42mW Per Channel High Fidelity Stereo Headphone Audio Amplifier for MP3 players July 2005 LM4980 2 Cell Battery, 1mA, 42mW Per Channel High Fidelity Stereo Headphone Audio Amplifier for MP3 players General Description The LM4980 is a stereo headphone audio amplifier, which when connected to a 3.0V supply, delivers 42mW to a 16Ω load with less than 1% THD+N. With the LM4980 packaged in the SD package, the customer benefits include low profile and small size. This package minimizes PCB area and maximizes output power. The LM4980 features circuitry that significantly reduces output transients (“clicks” and “pops”) while driving headphones during device turn-on and turn-off without costly external additional circuitry. The LM4980 also includes an externally controlled low-power consumption active-low shutdown mode, and thermal shutdown. Boomer audio power amplifiers are designed specifically to use few external components and provide high quality output power in a surface mount package. Key Specifications j Output power (RL = 16Ω, VDD = 3.0V, THD+N = 1%) j Quiescent current (VDD = 3V) j Micropower shutdown current j Supply voltage operating range j PSRR @ 1kHz, VDD = 3.0V j PSRR @ 217Hz, VDD = 3.0V 42mW (typ) 1mA (typ) 0.1µA (typ) 1.5V < VDD < 3.3V 90dB (typ) 100dB (typ) Features n 2-cell 1.5V to 3.3V battery operation n Unity-gain stable n “Click and pop” suppression circuitry for shutdown and power on/off transient with he...