TPA6138A2

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPA6138A2 SLOS704B – JANUARY 2011 – REVISED AUGUST 2015 TPA6138A2 DirectPath™ Headphone Driver With Adjustable Gain 1 Features 1 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 2 Applications LCD and PDP TV Blu-ray Disc™, DVD Players Set-Top Boxes Mini/Micro Combo Systems Sound Cards Laptops 3 Description 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 differe...