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带有插孔检测的音频放大器

产品详情

主要特征

应用/用途

技术文档

数据资料 带有插孔检测的音频放大器 Jun 22, 2011

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主要特征

  • 30mW Headphone Amplifier Employs Second- Generation DirectDrive® with Dual-Mode Charge-Pump Architecture
  • Automatic Jack Detection Circuitry
  • Microphone Amplifier and Bias
  • 1.8V Power Supply
  • 2.4V to 3.6V Microphone Power Supply
  • Headphone Amplifier Volume Control
  • Decodes Data from a Passive Multibutton Headset Remote Control
  • 25-Bump, 2.4mm x 2.3mm, 0.4mm Pitch WLP

应用/用途

  • 移动手机
  • 笔记本电脑
  • 便携式游戏机
  • 智能电话
  • 平板电脑

描述

The MAX97236 is an audio amplifier with volume control and microphone preamplifier intended for use in portable audio systems employing a headphone jack. The audio circuit is powered from a single, dual-mode charge pump, allowing the output signals to be ground referenced, and eliminating the need for large and expensive DC-blocking capacitors. The configuration of a 3.5mm jack is determined by autoconfigure circuitry. The IC’s functional blocks are auto-enabled after the configuration of the jack is determined.

The audio amplifier is powered from a single 1.8V power supply that reduces overall power consumption. The microphone preamplifier and bias are powered from a separate power-supply input accommodating bias voltages that are greater than 2.4V.

The automatic jack detection determines when a 3.5mm plug is inserted into the system jack and determines the configuration of the installed load. The configuration of the load is then reported to the system through the I2C interface. Multiple popular jack and load configurations are detectable with this scheme. The IC detects headsets, headphones, and A/V cables.

The headphone amplifier is capable of over 35mW into 16Ω. The device is available in a small, 25-bump WLP package with a 0.4mm pitch and is specified over the extended -40°C to +85°C temperature range.

技术文档

数据资料 带有插孔检测的音频放大器 Jun 22, 2011

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心