TPA6140A2是TI公司的一款耳机放大器产品，TPA6140A2是具有 I2C 音量控制的 25mW G 类 DirectPath? 立体声耳机放大器 (TPA6140)，本页介绍了TPA6140A2的产品说明、应用、特性等，并给出了与TPA6140A2相关的TI元器件型号供参考。
TPA6140A2 - 具有 I2C 音量控制的 25mW G 类 DirectPath? 立体声耳机放大器 (TPA6140) - 耳机放大器 - 低功耗放大器 - TI公司（Texas Instruments，德州仪器）
The TPA6140A2 (also known as TPA6140) is a Class-G DirectPath stereo headphone amplifier with built-in I2C volume control. Class-G technology maximizes battery life by adjusting the voltage supplies of the headphone amplifier based on the audio signal level. At low level audio signals, the internal supply voltage is reduced to minimize power dissipation. DirectPath™ technology eliminates external DC-blocking capacitors.
The device operates from a 2.5V to 5.5V supply voltage. Class-G operation keeps total supply current below 5.0mA while delivering 500µW per channel into 32. Shutdown mode reduces the supply current to less than 3µA and is activated through the I2C interface.
The TPA6140A2 (TPA6140) I2C register map is compatible to the TPA6130A2, simplifying software development.
The amplifier outputs have short-circuit and thermal-overload protection along with ±8kV HBM ESD protection, simplifying end equipment compliance to the IEC 61000-4-2 ESD standard.
The TPA6140A2 (TPA6140) is available in a 0,4mm pitch, 16-bump 1,6mm× 1,6mm WCSP (YFF) package.
- TI Class-G Technology Significantly Prolongs Battery Life and Music Playback Time
- 0.6mA / Ch Quiescent Current
- 50% to 80% Lower Quiescent Current than Ground-Referenced Class-AB Headphone Amplifiers
- DirectPath™ Technology Eliminates Large Output DC-Blocking Capacitors
- Outputs Biased at 0V
- Improves Low Frequency Audio Fidelity
- I2C Volume Control
- –59dB to +4dB Gain
- Active Click and Pop Suppression
- Fully Differential Inputs Reduce System Noise
- Also Configurable as Single-Ended Inputs
- SGND Pin Eliminates Ground Loop Noise
- Wide Power Supply Range: 2.5 V to 5.5 V
- 100 dB Power Supply Noise Rejection
- Short-Circuit Current Limiter
- Thermal-Overload Protection
- Software Compatible with TPA6130A2
- 0,4 mm Pitch, 1,6mm× 1,6mm WCSP Package
- APPLICATIONS
- Cellular Phones / Music Phones
- Portable Media / MP3 Players
- Portable CD / DVD Players
