General Description
The MAX9720 stereo headphone amplifier combines Maxim’s patented DirectDrive architecture and SmartSense™, an automatic mono/stereo detection feature. Conventional headphone amplifiers require a bulky DC-blocking capacitor between the headphone and the amplifier. DirectDrive produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, board space, and component height.

Features
♦ DirectDrive Eliminates Bulky DC-Blocking Capacitors
♦ SmartSense Automatic Short Detection
♦ Low 5mA Quiescent Current
♦ Fixed Gain Eliminates External Feedback Network
    MAX9720A: -1V/V
    MAX9720B: -1.41V/V
♦ 50mW per Channel Output Power
♦ Ultra-Low 0.003% THD+N
♦ High PSRR (92dB at 217Hz)
♦ Integrated Click-and-Pop Suppression
♦ 1.8V to 3.6V Single-Supply Operation
♦ Thermal Overload Protection
♦ Available in Space-Saving Packages
    16-Bump UCSP (2mm x 2mm x 0.6mm)
    16-Pin TSSOP

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