LM49200TL

• Differential mono input and stereo single-ended input
• 32-step digital volume control (-80 to 18 dB)
• Three independent volume channels (left, right, mono)
• Independent headphone volume control
• Flexible outputs are speaker and headphone outputs
• Truly headphone amplifiers eliminate large DC partition capacitance, reducing PCB space and cost
• Receiving and transmitting through the ability
• Soft-enabled function
• RF anti-interference topology
• "Click" sound suppression circuit
• Thermal shutdown protection
• Micropower shutdown
• I 2 C control interface
• Space-saving microSMD package

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LM49200 is a fully integrated stereo power amplifier capable of delivering 500mW of continuous power at an average of 1% THD + N8Ω per channel using a 3.3V power supply audio subsystem. LM49200 includes a stand-alone stereo headphone amplifier that can deliver 32Ω to 35MW per channel.

LM49200 has three input channels. A pair of single-ended input and fully differential input channels. LM49200 function input 32-step digital volume control on stage and an 8-step digital volume control headphone output stage.

The digital volume control and output mode are available via Dual Wire I 2 C-compatible interface, allowing for flexible routing and mixing of audio channels.

LM49200 are designed for cellular phones, PDAs, and other portable handheld applications. High integration reduces external components. True headphone amplifiers eliminate large DC output capacitance, reducing board space required and reducing costs.

Key specifications:

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• Portable electronic devices
• mobile phone
• handheld computer