LM4947 Datasheet

LM4947 Mono Class D and Stereo Audio Sub-System

The LM4947 is an audio subsystem capable of efficiently delivering 500mW (Class D operation) of continuous average power into a mono 8Ω bridgedtied load (BTL) with 1% THD+N, 37mW (Class AB operation) power channel of continuous average power into stereo 32Ω single-ended (SE) loads with 1% THD+N, or .

Features

1
•2 I2C Control Interface
• I2C Programmable Texas Instruments 3D Audio
• I2C Controlled 32 Step Digital Volume Control (-59.5dB to +18dB)
• Three Independent Volume Channels (Left, Right, Mono)
• Eight Distinct Output Modes
• Small, 25
  –Bump DSBGA Packaging
• “Click and Pop” Suppression Circuitry
• Thermal Shutdown Protection
• Low Shutdown Current (0.1μA, typ)
• RF Suppression
• Differential Mono and Stereo Inputs
• Stereo Input Mux KEY SPECIFICATIONS
• THD+N at 1kHz, 500mW into 8Ω BTL (3.3V): 1.0% (typ)
• THD+N at 1kHz, 37mW into 32Ω SE (3.3V): 1.0% (typ)
• Single Supply Operation (VDD): 2..