完备的音频耳机插座检测方案
The MAX14579E/MAX14579AE provide a simple solution for detecting the insertion and managing the operation of a 3.5mm stereo headset with a microphone. These devices integrate all circuitry required to detect SEND/END button press events and generate required microphone bias voltages. The devices are managed with only three GPIOs from the host controller to select between call mode and standby mode, and monitor the SEND/END and jack insertion status. In call mode, the low-noise LDO is enabled to provide DC bias to the externally preamplified microphone. In standby mode, microphone low-power pulsing is enabled to reduce supply current while waiting for a SEND/END button press event. Two open-drain outputs signal the host controller when an insertion/removal or SEND/END button press event occurs. The MAX14579E/MAX14579AE manage jack insertion detection by monitoring a 3.5mm socket with a normally open jack insertion switch. The devices are available in an 8-pin TDFN package, and are fully specified over the -40°C to +85°C extended temperature range.
关键特性
| 应用
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| 语言 | 下载文件 | 备注 |
|---|---|---|
| 英文 | MAX14579AE-MAX14579E.pdf | Rev 0; 07/2011 |
| Part Number | VSUPPLY (V) | Low-Noise LDO Output (V) | MIC Switch Detection | Control Inputs | Supply Current for MIC Detection (µA) | Pop-Up Noise Elimination | ESD Protection | Package/Pins | Oper. Temp. (°C) |
|---|---|---|---|---|---|---|---|---|---|
| MAX14579E | 2.5 to 5.5 | 2.2 | Ground | MIC Mode | 1.3 | Plug-in and Plug-out | 15kV HBM on MIC and DETIN | TDFN-EP/8 | -40 to +85 |
| 型号 | 状况 | 推荐替代产品 | 封装 | 温度 | RoHS/无铅 |
|---|---|---|---|---|---|
| MAX14579EETA+ | 生产中 | TDFN-EP,；8引脚；4.4mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX14579EETA+T | 生产中 | TDFN-EP,；8引脚；4.4mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX14579EETA+TW | 生产中 | TDFN-EP,；8引脚；4.4mm² | -40°C至+85°C | RoHS/无铅：无铅 |
