TPA6138A2
- Stereo DirectPath™ Headphone Amplifier
- 40 mW Into 32 Ω With 3.3-V Supply
- Low THD+N < 0.01% at 10 mW Into 32 Ω
- High SNR, >90 dB
- Differential Input and Single-Ended Output
- Adjustable Gain by External Gain-Setting
Resistors - Configurable as a Second-Order Low-Pass Filter
- Ideal for PWM Audio Sources
- Low DC Offset, <1 mV
- Ground-Referenced Outputs Eliminate DC-
Blocking Capacitors- Reduce Board Area
- Reduce Component Cost
- Improve THD+N Performance
- No Degradation of Low-Frequency Response
Due to Output Capacitors
- Short-Circuit Protection
- Click- and Pop-Reduction Circuitry
- External Undervoltage Mute
- Active Mute Control for Pop-Free Audio On/Off
Control - Space-Saving TSSOP Package
The TPA6138A2 is a pop-free stereo headphone amplifier designed to allow the removal of the output dc-blocking capacitors for reduced component count and cost. The device is ideal for single-supply electronics where size and cost are critical design parameters.
Designed using TI’s patented DirectPath™ technology, The TPA6138A2 is capable of driving 25 mW into a 32-Ω load with 3.3-V supply voltage. The device has differential inputs and uses external gain-setting resistors that supports a gain range of ±1 V/V to ±10 V/V. Gain can be configured individually for each channel. The device can also be configured as a second-order low-pass filter and is ideal for interfacing with PWM audio sources. Audio output compiles with ±8-kV IEC ESD protection, requiring just a simple resistor-capacitor ESD protection circuit. The TPA6138A2 has built-in active-mute control for pop-free audio on/off control. The TPA6138A2 has an external undervoltage detector that mutes the output when the power supply is removed, ensuring a pop-free shutdown.
Using the TPA6138A2 in audio products can reduce component count considerably compared to traditional headphone amplifiers. The TPA6138A2 does not require a split-rail power supply or a dc blocking capacitor. The TPA6138A2 integrates its own charge pump to generate a negative supply rail that provides a clean, pop-free ground-biased audio signal.
The TPA6138A2 is available in a 14-pin TSSOP.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | TPA6138A2 DirectPath™ Headphone Driver With Adjustable Gain 数据表 (Rev. B) | PDF | HTML | 2015-8-24 | ||
| 应用手册 | Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) | 2019-8-26 | ||||
| 应用手册 | AN-1849 An Audio Amplifier Power Supply Design (Rev. C) | 2019-6-27 |
设计与开发
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TPA6138A2EVM — TPA6138A2EVM 评估模块
The TPA6138A2EVM customer evaluation module (EVM) demonstrates the capabilities and operation of the TPA6138A2PW integrated circuit from Texas Instruments. The TPA6138A2PW is a 25mW Pop-Free stereo Head Phone driver designed to replace headphone circuit based on Op amps and passives.
The TPA6138A2 (...)
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| TSSOP (PW) | 14 | Ultra Librarian |
订购和质量
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