25-mW DirectPath™ Stereo Headphone Amplifier with Pop Suppression (TPA6132) - TPA6132A2

TPA6132A2 (ACTIVE)

25-mW DirectPath™ Stereo Headphone Amplifier with Pop Suppression (TPA6132)

 

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.

Features

  • 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
  • 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
    • 16-Pin, 3 mm × 3 mm Thin QFN

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Parametrics Compare all products in Headphone Amplifier

 
Output Power (W)
Analog Supply (V) (Min)
Analog Supply (V) (Max)
PSRR (dB)
Rating
Operating Temperature Range (C)
Headphone Channels
Volume Control
Shutdown Current (ISD) (uA)
Ground-Centered Outputs
Architecture
Iq per channel (Typ) (mA)
TPA6132A2 TPA4411 TPA6130A2 TPA6133A2 TPA6136A2 TPA6138A2 TPA6140A2 TPA6141A2 TPA6166A2
0.025    0.08    0.138    0.138    0.025    0.25    0.025    0.025    0.03   
2.3    1.8    2.5    2.5    5.5    3.6    2.5    2.5    1.7   
5.5    4.5    5.5    5.5    2.3    3.6    5.5    5.5    1.9   
100    80    109    109    100    80    105    105    92   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
Stereo    Stereo    Stereo    Stereo    Stereo    Stereo    Stereo    Stereo    Stereo   
No    No    Yes    No    No    No    Yes    No    Yes   
0.7    1    0.4    0.08    0.7      1    1     
Yes    Yes    Yes    Yes    Yes    Yes    Yes    Yes    Yes   
Class AB    Class AB    Class AB    Class AB    Class AB    Class AB    Class G    Class G    Class G   
1.05    3.7    2    4.2    1.05    14    0.6    0.6    1.2   

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