Diodes PAM8908 - Manual

PAM8901 / PAM8908
Document number: DSxxxxx Rev. 1 - 1
1 of 12
www.diodes.com
December 2012
© Diodes Incorporated
PAM8901 / PAM8908
A Product Line of
Diodes Incorporated
25mW TRUE CAP FREE STEREO HEADPHONE AMPLIFIER
Description
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
16 Ω 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
Typical Applications Circuit
Typical Applcation Configuration with Differential Input Signals
PAM8901/
PAM8908