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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPA6132A2 25-mW DirectPath™ Stereo Headphone Amplifier With Pop Suppression datasheet (Rev. B) | PDF | HTML | 14 Jul 2017 |
| Application note | Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) | 26 Aug 2019 | ||
| Application note | AN-1849 An Audio Amplifier Power Supply Design (Rev. C) | 27 Jun 2019 | ||
| Analog Design Journal | 2Q 2010 Issue Analog Applications Journal | 06 May 2010 | ||
| Analog Design Journal | Precautions for connecting APA outputs to other devices | 06 May 2010 | ||
| Application note | Ground Loop Break (GLB) Circuits | 01 Oct 2009 |
For additional terms or required resources, click any title below to view the detail page where available.
The TPA6132A2EVM2 allows the engineer to evaluate the TPA6132A2, a stereo DirectPath™ (capacitor-free) headphone amplifier with 4 gain settings (-6dB, 0dB, +3dB and +6dB).
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WQFN (RTE) | 16 | Ultra Librarian |
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