The PAM8901 / PAM8908 stereo headphone driver is designed for portable equipment where board space is at a premium. The PAM8901 / PAM8908 uses a unique, patent pending 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. The PAM8901 / PAM8908 delivers up to 25mW per channel into a 16Ω load and has low 0.03% THD+N. A high power-supply rejection ratio (80dB at 1kHz) allows this device to operate from noisy digital supplies without an additional linear regulator. The PAM8901 / PAM8908 operates from a single supply from 2.5V t o 5.5V, has short-circuit and over temperature protection. Shutdown mode reduces supply current to less than 1µA. Features • Patent Pending 3 Phase Power Line Shift Charge Pump Eliminates Need for DC-Blocking Capacitors • TrueCapFree Architecture, Output Biased at 0V (System Ground) • Excellent Low Frequency Fidelity • 80dB PSRR at 1kHz • Less than 1uA Shutdown current • Support both Fully differential and Single-Ended Inputs • Short Circuit and Over Temperature Protection • Selectable Gain settings:-6dB,0dB,3dB and 6dB • Available in Space Saving Packages: TQFN3x3-16L Pin Assignments Applications • Smart Phones/Cellular Phones • Notebook Computers • Portable DVD Player • Personal Digital Assistants (PDAs ) • Electronic Dictionaries • Digital Still Cameras • Portable Gaming