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TPA6132A2RTER

25-mW, stereo, analog input headphone amplifier in WQFN

Manufacturer:

TI
Mfr.Part #:

TPA6132A2RTER
Datasheet:

TPA6132A2RTER Datasheet (PDF)
Output power (W):

0.025
Analog supply (min) (V):

2.3
Analog supply voltage (max) (V):

5.5
Load (min) (Ω):

16
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TPA6132A2RTER General 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.

Key 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
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

Specifications

Output power (W)	0.025	Analog supply (min) (V)	2.3
Analog supply voltage (max) (V)	5.5	Load (min) (Ω)	16
PSRR (dB)	100	Rating	Catalog
Operating temperature range (°C)	-40 to 85	Headphone channels	Stereo
Volume control	No	Shutdown current (ISD) (µA)	0.7
Architecture	Class-AB	Iq per channel (typ) (mA)	1.05