TPA6132A2 Datasheet, PDF (1/28 Pages) Texas Instruments – 25-mW DIRECTPATH™ STEREO HEADPHONE AMPLIFIER WITH POP SUPPRESSION

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TPA6132A2
SLOS597A – DECEMBER 2008 – REVISED OCTOBER 2014
TPA6132A2 25-mW DirectPath™ Stereo Headphone Amplifier With Pop Suppression
1 Features
•1 Patented DirectPath™ Technology Eliminates
Need for DC-Blocking Capacitors
– Outputs Biased at 0 V
– Excellent Low Frequency Fidelity
• Active Click and Pop Suppression
• 2.1 mA Typical Supply Current
• Fully Differential or Single-Ended Inputs
– Built-In Resistors Reduces Component Count
– Improves System Noise Performance
• Constant Maximum Output Power from 2.3 V to
5.5 V Supply
– Simplifies Design to Prevent Acoustic Shock
• Improved RF Noise Immunity
• Microsoft^TM Windows Vista^TM Compliant
• High Power Supply Noise Rejection
– 100 dB PSRR at 217 Hz
– 90 dB PSRR at 10 kHz
• Wide Power Supply Range: 2.3 V to 5.5 V
• Gain Settings: –6 dB, 0 dB, 3 dB, and 6 dB
• Short-Circuit and Thermal-Overload Protection
• ±8 kV HBM ESD Protected Outputs
• Small Package Available
– 16-Pin, 3 mm × 3 mm Thin QFN
2 Applications
• Smart Phones / Cellular Phones
• Notebook Computers
• CD / MP3 Players
• Portable Gaming
3 Description
The TPA6132A2 (sometimes referred to as TPA6132)
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 –6 dB, 0 dB,
3 dB or 6 dB. The amplifier drives 25 mW into 16 Ω
speakers from a single 2.3 V supply. The TPA6132A2
(TPA6132) provides a constant maximum output
power independent of the supply voltage, thus
facilitating the design for prevention of acoustic
shock.
The TPA6132A2 features fully differential inputs to
reduce system noise pickup between the audio
source and the headphone amplifier. The high power
supply noise rejection performance and differential
architecture provides 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 TPA6132A2 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPA6132A2
WQFN (16)
3.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
OUTR+
OUTR-
CODEC
OUTL+
OUTL-
ENABLE
GAIN0
GAIN1
VBAT
INR+
INR-
OUTR
TPA6132A2
INL+
OUTL
INL-
EN
G0
G1
VDD
HPVDD
CPP
SGND
PGND
HPVSS
CPN
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.