SOC

TPA 6139A2

RIGHT

DAC

DAC

LEFT

Headphone

Programmable

Gain

-1x to -10x

–

+

–

+

TPA6139A2

www.ti.com

SLOS700B – JANUARY 2011 – REVISED JUNE 2012

DirectPath™ 25-mW Headphone Amplifier With

Programmable-Fixed Gain

Check for Samples: TPA6139A2

1

FEATURES

DESCRIPTION

The TPA6139A2PW is a 25mW Pop-Free stereo

23

•

DirectPath™

Head Phone driver designed to reduce component

–

Eliminates Pop/Clicks

count, board space and cost. It is ideal for single

–

Eliminates Output DC-Blocking Capacitors

supply electronics where size and cost are critical

design parameters.

–

3 V to 3.6 V Supply voltage

•

Low Noise and THD

The TPA6139A2 does not require a power supply

greater than 3.3V to generate its 25mW, nor does it

–

SNR > 105 dB at –1x Gain

require a split rail power supply.

–

Typical Vn < 15

μVms 20-20kHz at –1x Gain

Designed

using

TI’s

patented

DIRECTPATH™

–

THD+N < 0.003% at 10k

Ω Load and –1x

technology which integrates a charge pump to

Gain

generate a negative supply rail that provides a clean,

•

25 mW into 600

Ω Load

pop-free ground biased output. The TPA6139A2 is

capable of driving 25mW into 32

Ω and 2Vms into a

•

2 Vrms Output Voltage into 5k

Ω Load

600

Ω load. DIRECTPATH also allows the removal of

•

Single Ended Input and Output

the costly output DC-blocking capacitors.

•

Programmable Gain Select Reduces

The device has fixed gain single ended inputs with a

Component Count

gain select pin. Using a single resistor on this pin, the

–

13x Gain Values

designer can choose from 13 internal programmable

•

Active Mute With More Than 80dB Attenuation

gain settings to match the line driver with the Codec

output level. It also reduces the component count and

•

Short Circuit and Thermal Protection

board space.

•

±8kV HBM ESD Protected Outputs

Headphone outputs have ±8kV HBM ESD protection

enabling

a

simple

ESD

protection

circuit.

The

APPLICATIONS

TPA6139A2 has built-in active mute control with more

•

PDP / LCD TV

that 80dB attenuation for pop-free mute on/off control.

•

Blu-ray Disc™, DVD Players

The TPA6139A2 is available in a 14-pin TSSOP and

•

Mini/Micro Combo Systems

a 16-pin QFN. For a pin compatible 2vrms line driver

•

Soundcards

see DRV612.

1

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.

2

DirectPath, DIRECTPATH are trademarks of Texas Instruments.

3

Blu-ray Disc is a trademark of Blu-ray Disc Association.

UNLESS

OTHERWISE

NOTED

this

document

contains

Copyright © 2011–2012, Texas Instruments Incorporated

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.