LM49200中文资料具有 I2C 控制的 500mW 立体声、模拟输入 AB 类音频放大器数据手册TI规格书

描述 Description

The LM49200 is a fully integrated audio subsystem with a stereo power amplifier capable of delivering 500mW of continuous average power per channel into 8Ω with 1% THD+N using a 3.3V supply. The LM49200 includes a separate stereo headphone amplifier that can deliver 35mW per channel into 32Ω. The LM49200 has three input channels. A pair of single-ended inputs and a fully differential input channel. The LM49200 features a 32-step digital volume control on the input stage and an 8-step digital volume control on the headphone output stage. The digital volume control and output modes are programmed through a two-wire I2C compatible interface that allows flexibility in routing and mixing audio channels. The LM49200 is designed for cellular phone, PDA, and other portable handheld applications. The high level of integration minimizes external components. The True Ground headphone amplifier eliminates the physically large DC blocking output capacitors reducing required board space and reducing cost.

特性 Features

• Differential Mono Input and Stereo Single-Ended Input
• Three Independent Volume Channels (Left, Right, Mono)
• Flexible Output for Speaker and Headphone Output
• Receiver Pass-Through Capability
• RF Immunity Topology
• Thermal Shutdown Protection
• I2C Control Interface
• Supply Voltage (VDD): 2.7V ≤ VDD ≤ 5.5V
• Output power at VDD = 5V, 1% THD+N
• RL = 32Ω headphone: 38mW (typ)
• Output power at VDD = 3.3V, 1% THD+N
• RL = 32Ω headphone: 38mW (typ)
• PSRR:
• Shutdown power supply current 0.02μA (typ)