TPA6139A2_15 Datasheet, PDF (1/23 Pages) Texas Instruments – DirectPath™ 25-mW Headphone Amplifier With Programmable-Fixed Gain

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TPA6139A2
SLOS700B – JANUARY 2011 – REVISED JUNE 2012
DirectPath™ 25-mW Headphone Amplifier With
Programmable-Fixed Gain
Check for Samples: TPA6139A2
FEATURES
1
•23 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
• PDP / LCD TV
• Blu-ray Disc™, DVD Players
• Mini/Micro Combo Systems
• Soundcards
DESCRIPTION
The TPA6139A2PW is a 25mW Pop-Free stereo
Head Phone driver designed to reduce component
count, board space and cost. It is ideal for single
supply electronics where size and cost are critical
design parameters.
The TPA6139A2 does not require a power supply
greater than 3.3V to generate its 25mW, nor does it
require a split rail power supply.
Designed using TI’s patented DIRECTPATH™
technology which integrates a charge pump to
generate a negative supply rail that provides a clean,
pop-free ground biased output. The TPA6139A2 is
capable of driving 25mW into 32Ω and 2Vms into a
600Ω load. DIRECTPATH also allows the removal of
the costly output DC-blocking capacitors.
The device has fixed gain single ended inputs with a
gain select pin. Using a single resistor on this pin, the
designer can choose from 13 internal programmable
gain settings to match the line driver with the Codec
output level. It also reduces the component count and
board space.
Headphone outputs have ±8kV HBM ESD protection
enabling a simple ESD protection circuit. The
TPA6139A2 has built-in active mute control with more
that 80dB attenuation for pop-free mute on/off control.
The TPA6139A2 is available in a 14-pin TSSOP and
a 16-pin QFN. For a pin compatible 2vrms line driver
see DRV612.
DAC
SOC
DAC
–
+
Programmable
Gain
-1x to -10x TPA 6139A2
LEFT
Headphone
–
RIGHT
+
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
DirectPath, DIRECTPATH are trademarks of Texas Instruments.
2
Blu-ray Disc is a trademark of Blu-ray Disc Association.
3
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011–2012, Texas Instruments Incorporated