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Home » NEWEST Products » New by Manufacturer » Texas Instruments » Texas Instruments TPA6138A2 / TPA6139A2 Headphone Drivers
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Texas Instruments TPA6138A2 / TPA6139A2 Headphone Drivers

Texas Instruments TPA6138A2 and TPA6139A2 DirectPathheadphone drivers are designed for use in PDP / LCD TV applications as well as Blu-Ray™ and DVD players, mini / micro combo systems, and sound cards. The TI TPA6138A2 pop-free stereo headphone amplifier with adjustable gain is designed to allow the removal of the output dc-blocking capacitors for reduced component count and cost. 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 support a gain range of ±1 V/V to ±10 V/V. The TI TPA6139A2 pop-free headphone driver with programmable fixed gain does not require a power supply greater than 3.3V to generate 25mW and does not require a split rail power supply. The TI TPA6139A2 allows the designer to choose from 12 internal programmable gain settings to match the line driver with the Codec output level.

TPA6138A2 Features
  • 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
TPA6139A2 Features
  • DirectPath™: Eliminates Pop/Clicks, Eliminates Output DC-Blocking Capacitors, 3 V to 3.6 V Supply voltage
  • Low Noise and THD: SNR > 105 dB at –1x Gain, Typical Vn < 15 µVms 20-20kHz at –1x Gain, THD+N < 0.003% at 10kΩ Load and –1x Gain
  • 25 mW into 600 Ω Load
  • 2 Vrms Output Voltage into 5kΩ Load
  • Single Ended Input and Output
  • Programmable Gain Select Reduces Component Count: 13x Gain Values
  • Active Mute With More Than 80dB Attenuation
  • Short Circuit and Thermal Protection
  • ±8kV HBM ESD Protected Outputs
Applications
  • LCD and PDP TV
  • Blu-ray Disc™, DVD Players
  • Set-Top Boxes
  • Mini/Micro Combo Systems
  • Sound Cards
  • Laptops
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