General Description
The MAX4411 fixed-gain, stereo headphone amplifier is designed for portable equipment where board space is at a premium. The MAX4411 uses a unique, patented DirectDrive architecture to produce a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, board space, and component height. Additionally, the gain of the amplifier is set internally (-1.5V/V, MAX4411 and -2V/V, MAX4411B), further reducing component count.

Features
♦ No Bulky DC-Blocking Capacitors Required
♦ Fixed -1.5V/V Gain Eliminates External Feedback Network
    MAX4411: -1.5V/V
    MAX4411B: -2V/V
♦ Ground-Referenced Outputs Eliminate DC-Bias Voltages on Headphone Ground Pin
♦ No Degradation of Low-Frequency Response Due to Output Capacitors
♦ 80mW per Channel into 16Ω
♦ Low 0.003% THD+N
♦ High PSRR (86dB at 217Hz)
♦ Integrated Click-and-Pop Suppression
♦ 1.8V to 3.6V Single-Supply Operation
♦ Low Quiescent Current (5mA)
♦ Independent Left/Right, Low-Power Shutdown Controls
♦ Short-Circuit and Thermal-Overload Protection
♦ ±8kV ESD-Protected Amplifier Outputs
♦ Available in Space-Saving Packages
    16-Bump UCSP (2mm ✕ 2mm ✕ 0.6mm)
    20-Pin Thin QFN (4mm ✕ 4mm ✕ 0.8mm)

Applications
    Notebook PCs
    Cellular Phones
    PDAs
    MP3 Players
    Smart Phones
    Portable Audio Equipment