TPA6135A2 Series

25-mW, stereo, analog input headphone amplifier with Hi-Z mode

Catalog

25-mW, stereo, analog input headphone amplifier with Hi-Z mode

Part	Mounting Type	Supplier Device Package	Features	Type	Package / Case	Max Output Power x Channels @ Load	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply [Min]	Voltage - Supply [Max]	Output Type	Utilized IC / Part	Supplied Contents	Amplifier Type	Board Type
Texas Instruments TPA6135A2RTET	Surface Mount	16-WQFN (3x3)	Depop Differential Inputs Short-Circuit and Thermal Protection Shutdown	Class AB	16-WFQFN Exposed Pad	2 channels 16 Ohm 25 mW	85 °C	-40 °C	2.3 V	5.5 V	Headphones 2-Channel (Stereo)
Texas Instruments TPA6135A2EVM						2 channels 16 Ohm 25 mW			2.5 V	5.5 V	Headphones 2-Channel (Stereo)	TPA6135A2	Board(s)	Class AB	Fully Populated

Catalog

25-mW, stereo, analog input headphone amplifier with Hi-Z mode

Key Features

• Patented DirectPath™ Technology Eliminates Need for DC-Blocking CapacitorsOutputs Biased at 0 VExcellent Low Frequency FidelityActive Click and Pop SuppressionHI-Z Output Mode2.1 mA Typical Supply CurrentFully Differential or Single-Ended InputsBuilt-In Resistors Reduces Component CountImproves System Noise PerformanceConstant Maximum Output Power from 2.3 V to 5.5 V SupplySimplifies Design to Prevent Acoustic ShockImproved RF Noise ImmunityMicrosoft™ Windows Vista™ CompliantHigh Power Supply Noise Rejection100 dB PSRR at 217 Hz90 dB PSRR at 10 kHzWide Power Supply Range: 2.3 V to 5.5 VGain Settings: 0 dB and 6 dBShort-Circuit and Thermal-Overload Protection±8 kV HBM ESD Protected OutputsSmall Package Available16-Pin, 3 mm × 3 mm Thin QFNAPPLICATIONSSmart Phones / Cellular PhonesNotebook ComputersCD / MP3 PlayersPortable GamingDirectPath is a trademark of Texas Instruments.Windows Vista is a trademark of Microsoft Corporation.Patented DirectPath™ Technology Eliminates Need for DC-Blocking CapacitorsOutputs Biased at 0 VExcellent Low Frequency FidelityActive Click and Pop SuppressionHI-Z Output Mode2.1 mA Typical Supply CurrentFully Differential or Single-Ended InputsBuilt-In Resistors Reduces Component CountImproves System Noise PerformanceConstant Maximum Output Power from 2.3 V to 5.5 V SupplySimplifies Design to Prevent Acoustic ShockImproved RF Noise ImmunityMicrosoft™ Windows Vista™ CompliantHigh Power Supply Noise Rejection100 dB PSRR at 217 Hz90 dB PSRR at 10 kHzWide Power Supply Range: 2.3 V to 5.5 VGain Settings: 0 dB and 6 dBShort-Circuit and Thermal-Overload Protection±8 kV HBM ESD Protected OutputsSmall Package Available16-Pin, 3 mm × 3 mm Thin QFNAPPLICATIONSSmart Phones / Cellular PhonesNotebook ComputersCD / MP3 PlayersPortable GamingDirectPath is a trademark of Texas Instruments.Windows Vista is a trademark of Microsoft Corporation.

Description

The TPA6135A2 (sometimes referred to as TPA6135) is a DirectPath™ stereo headphone amplifier that eliminates the need for external dc-blocking output capacitors. Differential stereo inputs and built-in resistors set the device gain, further reducing external component count. Gain is selectable at 0 dB or 6 dB. The amplifier drives 25 mW into 16speakers from a single 2.3 V supply. The TPA6135A2 (TPA6135) provides a constant maximum output power independent of the supply voltage, thus facilitating the design for prevention of acoustic shock. The TPA6135A2 (TPA6135) features HI-Z mode which can set the outputs to a high impedance configuration. The fully differential inputs reduce system noise pickup between the audio source and the headphone amplifier. The high power supply noise rejection performance and differential architecture provide increased RF noise immunity. For single-ended input signals, connect INL+ and INR+ to ground. The device has built-in pop suppression circuitry to completely eliminate disturbing pop noise during turn-on and turn-off. The amplifier outputs have short-circuit and thermal-overload protection along with ±8 kV HBM ESD protection, simplifying end equipment compliance to the IEC 61000-4-2 ESD standard. The TPA6135A2 (TPA6135) operates from a single 2.3 V to 5.5 V supply with 2.1 mA of typical supply current. Shutdown mode reduces supply current to less than 1 µA. The TPA6135A2 (sometimes referred to as TPA6135) is a DirectPath™ stereo headphone amplifier that eliminates the need for external dc-blocking output capacitors. Differential stereo inputs and built-in resistors set the device gain, further reducing external component count. Gain is selectable at 0 dB or 6 dB. The amplifier drives 25 mW into 16speakers from a single 2.3 V supply. The TPA6135A2 (TPA6135) provides a constant maximum output power independent of the supply voltage, thus facilitating the design for prevention of acoustic shock. The TPA6135A2 (TPA6135) features HI-Z mode which can set the outputs to a high impedance configuration. The fully differential inputs reduce system noise pickup between the audio source and the headphone amplifier. The high power supply noise rejection performance and differential architecture provide increased RF noise immunity. For single-ended input signals, connect INL+ and INR+ to ground. The device has built-in pop suppression circuitry to completely eliminate disturbing pop noise during turn-on and turn-off. The amplifier outputs have short-circuit and thermal-overload protection along with ±8 kV HBM ESD protection, simplifying end equipment compliance to the IEC 61000-4-2 ESD standard. The TPA6135A2 (TPA6135) operates from a single 2.3 V to 5.5 V supply with 2.1 mA of typical supply current. Shutdown mode reduces supply current to less than 1 µA.