DESCRIPTION
The WM9001 is a powerful, high quality speaker driver which can operate in class D or AB mode, providing total flexibility to the system designer. Low leakage, high PSRR and pop/click suppression enable direct battery connection to the speaker supply. RF noise suppression techniques and differential design are used to suppress undesired noise. A single-ended input option has been included for complete system flexibility.

FEATURES
• Class D and AB speaker driver modes for flexibility
• Speaker driver provides 1W into 8Ω at <0.1% THD
• SNR 102dB (Class AB), 97dB (Class D)
• Differential and single-ended input modes
• >80dB PSRR @ 217Hz (SPKVDD)
• <1μA typical leakage with direct battery connection
• Filterless speaker connection
• Fully differential architecture (differential mode)
• Pop/click suppression
• RF noise suppression
• Fully compatible with Wolfson CODECs
   including WM8990 / WM8991
• Internal oscillator or external clock source
• Thermal shutdown protection
• 3x3mm QFN package

APPLICATIONS
• Mobile phones
• Portable navigation devices
• Portable media players
• Laptop computers and portable gaming devices
• Electronic dictionaries
• General-purpose high quality speaker amplifier