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TPA6132A2RTER-TPA6132A2RTER .
25-mW DirectPath™ Stereo Headphone Amplifier with Pop Suppression (TPA6132)
INR+
INR-
INL-
PGND
OUTR
VDD
OUTL
VBAT
CODEC
OUTR+
OUTR-
OUTL+
OUTL-
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TPA6132A2SLOS597B –DECEMBER 2008–REVISED JULY 2017
TPA6132A2 25-mW DirectPath™ Stereo Headphone Amplifier With Pop Suppression Features Patented DirectPath™ Technology Eliminates
Need for DC-Blocking Capacitors Outputs Biasedat0V Excellent Low Frequency Fidelity Active Click and Pop Suppression 2.1 mA Typical Supply Current Fully Differentialor Single-Ended Inputs Built-In Resistors Reduces Component Count Improves System Noise Performance Constant Maximum Output Power from 2.3Vto
5.5V Supply Simplifies Designto Prevent Acoustic Shock Improved RF Noise Immunity MicrosoftTM Windows VistaTM Compliant High Power Supply Noise Rejection 100 dB PSRRat 217 Hz 90 dB PSRRat10 kHz Wide Power Supply Range: 2.3Vto 5.5V Gain Settings: –6 dB,0 dB,3 dB, and6 dB Short-Circuit and Thermal-Overload Protection ±8 kV HBM ESD Protected Outputs Small Package Available 16-Pin,3 mm×3 mm Thin QFN
Applications Smart Phones/ Cellular Phones Notebook Computers CD/ MP3 Players Portable Gaming
DescriptionThe TPA6132A2 (sometimes referredtoas TPA6132)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. Gainis selectableat –6 dB,0 dB, dBor6 dB. The amplifier drives 25 mW into 16Ω
speakers froma single 2.3V supply. The TPA6132A2
(TPA6132) providesa constant maximum output
power independent of the supply voltage, thus
facilitating the design for prevention of acoustic
shock.
The TPA6132A2 features fully differential inputsto
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 circuitryto
completely eliminate disturbing pop noise during turn- and turn-off. The amplifier outputs have short-
circuit and thermal-overload protection along with kV HBM ESD protection, simplifying end
equipment complianceto the IEC 61000-4-2 ESD
standard.
The TPA6132A2 operates froma single 2.3V to
5.5V supply with 2.1 mAof typical supply current.
Shutdown mode reduces supply currentto less than μA.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe datasheet.
Simplified Schematic
