1FEATURES
2• TI Class-G Technology Significantly Prolongs
Battery Life and Music Playback Time
– 0.6 mA / Ch Quiescent Current
– 50% to 80% Lower Quiescent Current than
Ground-Referenced Class-AB Headphone
Amplifiers
• DirectPathTM Technology Eliminates Large
Output DC-Blocking Capacitors
– Outputs Biased at 0 V
– Improves Low Frequency Audio Fidelity
• I2C Volume Control
– –59 dB to +4 dB Gain
• Active Click and Pop Suppression
• Fully Differential Inputs Reduce System Noise
– Also Configurable as Single-Ended Inputs
• SGND Pin Eliminates Ground Loop Noise
• Wide Power Supply Range: 2.5 V to 5.5 V
• 100 dB Power Supply Noise Rejection
• Short-Circuit Current Limiter
• Thermal-Overload Protection
• Software Compatible with TPA6130A2
• 0,4 mm Pitch, 1,6 mm × 1,6 mm WCSP
Package

APPLICATIONS
• Cellular Phones / Music Phones
• Portable Media / MP3 Players
• Portable CD / DVD Players

DESCRIPTION
The TPA6140A2 (also known as TPA6140) is a
Class-G DirectPath™ stereo headphone amplifier
with built-in I2C volume control. Class-G technology
maximizes battery life by adjusting the voltage supplies of the headphone amplifier based on the
audio signal level. At low level audio signals, the
internal supply voltage is reduced to minimize power
dissipation. DirectPathTM technology eliminates
external DC-blocking capacitors.
The device operates from a 2.5 V to 5.5 V supply
voltage. Class-G operation keeps total supply current
below 5.0 mA while delivering 500 μW per channel
into 32 Ω. Shutdown mode reduces the supply
current to less than 3 μA and is activated through the
I2C interface.
The TPA6140A2 (TPA6140) I2C register map is
compatible to the TPA6130A2, simplifying software
development.
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 TPA6140A2 (TPA6140) is available in a 0,4 mm
pitch, 16-bump 1,6 mm × 1,6 mm WCSP (YFF)
package.