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TPA6140A2YFFR
25-mW Class-G DirectPath™ Stereo Headphone Amplifier with I2C Volume Control (TPA6140)
TPA6140A2
www.ti.com................................................................................................................................................. SLOS598A –MARCH 2009–REVISED OCTOBER 2009
CLASS-G DIRECTPATH™ STEREO HEADPHONE AMPLIFIER
WITHI2C VOLUME CONTROL
Checkfor Samples: TPA6140A2
1FEATURES DESCRIPTION TI Class-G Technology Significantly Prolongs The TPA6140A2 (also known as TPA6140) isa
Battery Life and Music Playback Time Class-G DirectPath™ stereo headphone amplifier
with built-inI2C volume control. Class-G technology
– 0.6 mA/ Ch Quiescent Current maximizes battery life by adjusting the voltage
– 50%to 80% Lower Quiescent Current than suppliesof the headphone amplifier based on the
Ground-Referenced Class-AB Headphone audio signal level. At low level audio signals, the
Amplifiers internal supply voltageis reducedto minimize power
DirectPathTM Technology Eliminates Large dissipation. DirectPathTM technology eliminates
external DC-blocking capacitors.
Output DC-Blocking Capacitors Outputs Biasedat0V The device operates froma 2.5Vto 5.5V supply
voltage. Class-G operation keeps total supply current
– Improves Low Frequency Audio Fidelitybelow 5.0 mA while delivering 500 μW per channel
•I2C Volume Control into 32 Ω. Shutdown mode reduces the supply
– –59 dBto+4 dB Gain currentto less than3 μA andis activated through the2C interface.
• Active Click and Pop Suppression Fully Differential Inputs Reduce System Noise The TPA6140A2 (TPA6140)I2C register map is
