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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.