TPA6140A2 Datasheet, PDF (1/27 Pages) Texas Instruments – CLASS-G DIRECTPATH™ STEREO HEADPHONE AMPLIFIER WITH I2C VOLUME CONTROL

TPA6140A2
www.ti.com .................................................................................................................................................................................................. SLOS598 – MARCH 2009
CLASS-G DIRECTPATH™ STEREO HEADPHONE AMPLIFIER
WITH I²C VOLUME CONTROL
FEATURES
1
•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
• DirectPath^TM 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. DirectPath^TM 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.
OUTR+
OUTR-
CODEC
OUTL+
OUTL-
1 mF
INR+
INR-
OUTR
TPA6140A2
INL+
OUTL
SCL
SDA
Vbat
2.2 mH
2.2 mF
INL-
SCL
SDA
AVDD
SW
HPVDD
CPP
SGND
AGND
HPVSS
CPN
2.2 mF
1 mF
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Class-G DirectPath, DirectPath are trademarks of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated