TPA6130A2_0701 Datasheet, PDF (1/29 Pages) Texas Instruments – 138-mW DIRECTPATH STEREO HEADPHONE AMPLIFIER WITH I2C VOLUME CONTROL

TPA6130A2
www.ti.com
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SLOS488A – NOVEMBER 2006 – REVISED DECEMBER 2006
138-mW DIRECTPATH™ STEREO HEADPHONE AMPLIFIER WITH I²C VOLUME CONTROL
FEATURES
• DirectPath™ Ground-Referenced Outputs
– Eliminates Output DC Blocking Capacitors
– Reduces Board Area
– Reduces Component Height and Cost
– Full Bass Response Without Attenuation
• Power Supply Voltage Range: 2.5 V to 5.5 V
• 64 Step Audio Taper Volume Control
• High Power Supply Rejection Ratio (>100 dB
PSRR)
• Differential Inputs for Maximum Noise
Rejection (68 dB CMRR)
• High-Impedance Outputs When Disabled
• Advanced Pop and Click Suppression
Circuitry
• Digital I²C Bus Control
– Per Channel Mute and Enable
– Software Shutdown
– Multi-Mode Support: Stereo HP, Dual Mono
HP, and Single-Channel BTL Operation
– Amplifier Status
• Space Saving Lead-Free (Pb-Free) Packages
– 20 Pin, 4 mm x 4 mm QFN
– 16 ball, 2 mm x 2 mm WCSP
• ESD Protection of 8 kV HBM and IEC Contact
APPLICATIONS
• Mobile Phones
• Portable Media Players
• Notebook Computers
• High Fidelity Applications
DESCRIPTION
The TPA6130A2 is a stereo DirectPath™ headphone amplifier with I²C digital volume control. The TPA6130A2
has minimal quiescent current consumption, with a typical I_DD of 4 mA, making it optimal for portable
applications. The I²C control allows maximum flexibility with a 64 step audio taper volume control, channel
independent enables and mutes, and the ability to configure the outputs into stereo, dual mono, or a single
receiver speaker BTL amplifier that drives 300 mW of power into 16 Ω loads.
The TPA6130A2 is a high fidelity amplifier with an SNR of 98 dB. A PSRR greater than 100 dB enables
direct-to-battery connections without compromising the listening experience. The output noise of 9 µVrms
(typical A-weighted) provides a minimal noise background during periods of silence. Configurable differential
inputs and high CMRR allow for maximum noise rejection in the noisy environment of a mobile device.
TPA6130A2 packaging includes a 2 by 2 mm chip-scale package, and a 4 by 4 mm QFN package.
SIMPLIFIED APPLICATION DIAGRAM
Audio Source
Left Out M
Left Out P
Right Out M
Right Out P
2
IC
GPIO
0.47 mF
0.47 mF
0.47 mF
0.47 mF
SD
LEFTINM
LEFTINP
RIGHTINM
RIGHTINP
SCL SDA
TPA6130A2
HPLEFT
HPRIGHT
GND
GND
CPP CPN CPVSS VDD VDD
1 mF
1 mF
1 mF 1 mF
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 is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006, Texas Instruments Incorporated