主页 音频 音频转换器 音频编解码器
主页
音频
音频转换器
音频编解码器

LM4931

正在供货

具有单声道高效扬声器和立体声耳机放大器的音频子系统

立即订购
数据表

LM4931

正在供货
数据表 立即订购

产品详情

Number of ADC channels 1 Number of DAC channels 3 Digital audio interface I2S, PCM Analog inputs 2 Analog outputs 3 Sampling rate (max) (kHz) 48 Rating Catalog ADC SNR (typ) (dB) 81 DAC SNR (typ) (dB) 86 Operating temperature range (°C) -40 to 85
Number of ADC channels 1 Number of DAC channels 3 Digital audio interface I2S, PCM Analog inputs 2 Analog outputs 3 Sampling rate (max) (kHz) 48 Rating Catalog ADC SNR (typ) (dB) 81 DAC SNR (typ) (dB) 86 Operating temperature range (°C) -40 to 85
DSBGA (YZR) 42 12.1875 mm² 3.75 x 3.25
  • 18-bit 44.1kHz or 48kHz Stereo DAC
  • 16-bit 8kHz , 12kHz , 16kHz, or 24kHz Voice-Band Codec
  • PLL for Operation from Common System Clocks
  • Either I2C or SPI Compatible Serial Interface
  • I2S Digital Audio Data Serial Interface
  • PCM Voice Audio Data Serial Interface
  • Differential Analog Microphone Input
  • 26mW/Channel Stereo Headphone Amplifier
  • 570mW Mono High Efficiency BTL 8Ω Amplifier
  • 32-step Volume Control for Audio Output Amplifiers with 1.5dB Step Size.
  • Unity-Gain Stable Headphone Amplifiers
  • No Snubber Networks or Bootstrap Capacitors are Required by the Headphone or Hands-Free Amplifiers
  • Adjustable Digital Side-Tone Attenuation
  • 16-step Volume Control for Microphone Preamp with 2dB Step Size
  • Configurable GPIO/Status Port
  • Available in the 42 bump DSBGA Package

Key Specifications

  • PLS OUT at AVDD = 5V, 8Ω
    • 1% THD+N, 1.1W (Typ)
  • PLS OUT at AVDD = 3.3V, 8Ω
    • 1% THD+N, 570mW (Typ)
  • PH/P OUT at AVDD = 5V & AVDD = 3.3V, 32Ω
    • 1% THD+N, 26mW (Typ)
  • Supply Voltage Range
    • DVDD, 2.7V to 4.0V
    • AVDD, 2.7V to 5.0V
  • Shutdown Current, 1.1µA
  • PSRR at 217Hz, AVDD = 3V, 62dB (Typ)
  • SNR (Voice Codec), 75dB (Typ)
  • SNR (Audio DAC), 86dB (Typ)

All trademarks are the property of their respective owners.

  • 18-bit 44.1kHz or 48kHz Stereo DAC
  • 16-bit 8kHz , 12kHz , 16kHz, or 24kHz Voice-Band Codec
  • PLL for Operation from Common System Clocks
  • Either I2C or SPI Compatible Serial Interface
  • I2S Digital Audio Data Serial Interface
  • PCM Voice Audio Data Serial Interface
  • Differential Analog Microphone Input
  • 26mW/Channel Stereo Headphone Amplifier
  • 570mW Mono High Efficiency BTL 8Ω Amplifier
  • 32-step Volume Control for Audio Output Amplifiers with 1.5dB Step Size.
  • Unity-Gain Stable Headphone Amplifiers
  • No Snubber Networks or Bootstrap Capacitors are Required by the Headphone or Hands-Free Amplifiers
  • Adjustable Digital Side-Tone Attenuation
  • 16-step Volume Control for Microphone Preamp with 2dB Step Size
  • Configurable GPIO/Status Port
  • Available in the 42 bump DSBGA Package

Key Specifications

  • PLS OUT at AVDD = 5V, 8Ω
    • 1% THD+N, 1.1W (Typ)
  • PLS OUT at AVDD = 3.3V, 8Ω
    • 1% THD+N, 570mW (Typ)
  • PH/P OUT at AVDD = 5V & AVDD = 3.3V, 32Ω
    • 1% THD+N, 26mW (Typ)
  • Supply Voltage Range
    • DVDD, 2.7V to 4.0V
    • AVDD, 2.7V to 5.0V
  • Shutdown Current, 1.1µA
  • PSRR at 217Hz, AVDD = 3V, 62dB (Typ)
  • SNR (Voice Codec), 75dB (Typ)
  • SNR (Audio DAC), 86dB (Typ)

All trademarks are the property of their respective owners.

The LM4931 is an integrated audio subsystem that supports voice and digital audio functions. The LM4931 includes a high quality stereo DAC, voice band codec, a stereo headphone amplifier and a high-power high efficiency mono speaker amplifier. It is primarily designed for demanding applications in mobile phones and other portable devices.

The LM4931 features an I2S serial interface for full range audio, a 16-bit PCM bi-directional serial interface for the voice band codec and an I2C/SPI compatible interface for control. The full range music path features an SNR of 86dB with an 18-bit 48kHz input. The headphone amplifier delivers at least 26mWRMS to a 32Ω single-ended stereo load with less than 1% distortion (THD+N) when AVDD = 3.3VDC. The mono speaker amplifier delivers up to 570mWRMS into an 8Ω load with less than 1% distortion when AVDD = 3.3VDC.

The LM4931 employs advanced techniques to reduce power consumption, to reduce controller overhead, 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.

The LM4931 is an integrated audio subsystem that supports voice and digital audio functions. The LM4931 includes a high quality stereo DAC, voice band codec, a stereo headphone amplifier and a high-power high efficiency mono speaker amplifier. It is primarily designed for demanding applications in mobile phones and other portable devices.

The LM4931 features an I2S serial interface for full range audio, a 16-bit PCM bi-directional serial interface for the voice band codec and an I2C/SPI compatible interface for control. The full range music path features an SNR of 86dB with an 18-bit 48kHz input. The headphone amplifier delivers at least 26mWRMS to a 32Ω single-ended stereo load with less than 1% distortion (THD+N) when AVDD = 3.3VDC. The mono speaker amplifier delivers up to 570mWRMS into an 8Ω load with less than 1% distortion when AVDD = 3.3VDC.

The LM4931 employs advanced techniques to reduce power consumption, to reduce controller overhead, 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.

open-in-new 查找其他 音频编解码器
下载 观看带字幕的视频 视频

技术文档

star =有关此产品的 TI 精选热门文档
未找到结果。请清除搜索并重试。
查看全部 1
类型 标题 下载最新的英语版本 日期
* 数据表 LM4931 Audio Subsystem w/Mono High Eff Loudspeaker & Stereo Headphone Amps 数据表 (Rev. E) 2013年 5月 1日

设计和开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

模拟工具

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®

PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库，您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案，然后再进行布局和制造，可缩短产品上市时间并降低开发成本。

在 PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)
发送申请
封装 引脚 下载
DSBGA (YZR) 42 查看选项
应遵守 TI 评估类商品的标准条款与条件。

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

视频