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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 16?

? 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