LM4947
Description
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 an output capacitor-less (OCL) configuration with identical specification as the SE configuration, from a 3.3V power supply. The LM4947 has six input channels: one pair for a two-channel stereo signal, the second pair for a secondary two-channel stereo input, and the third pair for a differential single-channel mono input.
Key Features
- 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
- Thermal Shutdown Protection
- Low Shutdown Current (0.1μA, typ)
- RF Suppression
