The TPA6132A2RTER (sometimes referred to as TPA6132) is a DirectPath™ stereo headphoneamplifier that eliminates the need for external dc-blocking output capacitors. Differential stereoinputs and built-in resistors set the device gain, further reducing external component count. Gainis selectable at –6 dB, 0 dB, 3 dB or 6 dB. The amplifier drives 25 mW into 16 Ω speakers from asingle 2.3 V supply. The TPA6132A2RTER (TPA6132) provides a constant maximum output power independentof the supply voltage, thus facilitating the design for prevention of acoustic shock.
The TPA6132A2RTER features fully differential inputs to reduce system noise pickup betweenthe audio source and the headphone amplifier. The high power supply noise rejection performance anddifferential 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 popnoise during turn-on and turn-off. The amplifier outputs have short-circuit and thermal-overloadprotection along with ±8 kV HBM ESD protection, simplifying end equipment compliance to the IEC61000-4-2 ESD standard.
The TPA6132A2RTER operates from a single 2.3 V to 5.5 V supply with 2.1 mA of typical supplycurrent. Shutdown mode reduces supply current to less than 1 µA.
Feature
Patented DirectPath™ Technology Eliminates Need for DC-Blocking Capacitors
Active Click and Pop Suppression
2.1 mA Typical Supply Current
Fully Differential or Single-Ended Inputs
Constant Maximum Output Power from 2.3 V to 5.5 V Supply
Improved RF Noise Immunity
MicrosoftTM Windows VistaTM 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
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
