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LM49350-具有接地参考立体声耳机放大器超低 EMI D 类扬声器放大器的高性能编解码器子系统
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TI产品 - LM49350介绍

LM49350 - 具有接地参考立体声耳机放大器超低 EMI D 类扬声器放大器的高性能编解码器子系统

LM49350是TI德州仪器公司的一款音频编解码器产品，LM49350是具有接地参考立体声耳机放大器超低 EMI D 类扬声器放大器的高性能编解码器子系统，本站介绍了LM49350的封装应用图解、特点和优点、功能等，并给出了与LM49350相关的TI元器件型号供参考。

LM49350 - 具有接地参考立体声耳机放大器超低 EMI D 类扬声器放大器的高性能编解码器子系统 - 音频编解码器 - 音频转换器 - 德州仪器

产品描述

The LM49350 is a high performance audio subsystem that supports both analog and digital audio functions. The LM49350 includes a high quality stereo DAC, a high quality stereo ADC, a stereo headphone amplifier that supports ground referenced output cap-less operation, a dual mode earpiece speaker amplifier, and a low EMI Class D loudspeaker amplifier. It is designed for demanding applications in mobile phones and other portable devices.

The LM49350 features dual bi-directional I 2S or PCM audio interfaces for full range audio and an I 2C compatible interface for control. The stereo DAC path features an SNR of 96dB with 24-bit 48 kHz input. The headphone amplifier delivers 69mWRMS (typ) to a 32Ω single-ended stereo load with less than 1% distortion (THD+N) when A_VDD = 3.3V. The earpiece speaker amplifier delivers 58mWRMS (typ) to a 32Ω bridged-tied load with less than 1% distortion (THD+N) when A_VDD = 3.3V. The loudspeaker amplifier delivers up to 495mW into an 8Ω load with less than 1% distortion when LS_VDD = 3.3V and up to 1.2W when LS_VDD = 5.0V.

The LM49350 employs advanced techniques to reduce power consumption, to reduce controller overhead, to speed development time, and to eliminate click and pop. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. It is therefore ideally suited for mobile phone and other low voltage applications where minimal power consumption, PCB area and cost are primary requirements.

产品特性

  • High performance 96dB SNR stereo DAC
  • High performance 94dB SNR stereo ADC
  • Up to 192kHz stereo audio playback
  • Up to 48kHz stereo recording
  • Dual bidirectional I 2S or PCM compatible audio interfaces
  • Read/write I 2C compatible control interface
  • Flexible digital mixer with sample rate conversion
  • Dual sigma-delta PLLs for operation from any clock at any sample rate
  • Digital 3D stereo enhancement
  • Dual 5 band parametric equalizers
  • Cascadable DSP effects that allow 10 band parametric equalization
  • ALC/Compressor/Limiter on both DAC and ADC paths
  • Ultra low EMI, Class D loudspeaker amplifier with spread spectrum control
  • Ground referenced output cap-less headphone amplifier operation
  • Earpiece speaker amplifier with reduced power consumption mode for mono differential line out applications
  • Stereo auxiliary inputs or mono differential input
  • Differential stereo microphone inputs with single-ended option
  • Automatic level control for digital audio inputs, stereo microphone inputs, and stereo auxiliary inputs
  • Flexible audio routing from input to output
  • 16 Step volume control for microphones with 2dB steps
  • 32 Step volume control for auxiliary inputs in 1.5dB steps
  • Micro-power shutdown mode
  • Available in the 3.5 x 3.5 mm 36 bump micro SMD package
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