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SLOS488B – NOVEMBER 2006 – REVISED FEBRUARY 2008
138-mW DIRECTPATH™ STEREO HEADPHONE AMPLIFIER WITH I
2
C VOLUME CONTROL
1
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
2
•
•
•
•
•
•
Digital I
2
C 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 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 I
2
C 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 I
2
C 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
GPIO
SD
Left Out M
0.47
m
F
Left Out P
0.47
m
F
Right Out M
0.47
m
F
Right Out P
0.47
m
F
CPP CPN
CPVSS
1
m
F
1
m
F
VDD
1
m
F
RIGHTINP
RIGHTINM
TPA6130A2
HPRIGHT
GND
GND
VDD
LEFTINP
LEFTINM
HPLEFT
I C
2
SCL SDA
1
m
F
1
2
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.
Copyright © 2006–2008, Texas Instruments Incorporated
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.
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
