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138-mW DirectPath Stereo Headphone Amplifier With I2C Volume Control (Rev. B)
Texas Instruments

Description
The TPA6130A2 is a stereo DirectPath? headphone amplifier with I2C digital volume control. The TPA6130A2 has minimal quiescent current consumption, with a typical IDD 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 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 ?Vrms (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.
Features
DirectPath Ground-Referenced Outputs Eliminates Output DC Blocking CapacitorsReduces Board Area Reduces Component Height and CostFull Bass Response Without Attenuation Power Supply Voltage Range: 2.5 V to 5.5 V64 Step Audio Taper Volume ControlHigh Power Supply Rejection Ratio (>100 dB PSRR)Differential Inputs for Maximum Noise Rejection (68 dB CMRR)High-Impedance Outputs When DisabledAdvanced Pop and Click Suppression CircuitryDigital I2C Bus ControlPer Channel Mute and EnableSoftware ShutdownMulti-Mode Support: Stereo HP, Dual Mono HP, and Single-Channel BTL OperationAmplifier StatusSpace Saving Lead-Free (Pb-Free) Packages 20 Pin, 4 mm x 4 mm QFN16 ball, 2 mm x 2 mm WCSPESD Protection of 8 kV HBM and IEC ContactAPPLICATIONSMobile PhonesPortable Media PlayersNotebook ComputersHigh Fidelity Applications DirectPath is a trademark of Texas Instruments.

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