TPA6138A2PW
Active40-MW, STEREO, ANALOG INPUT HEADPHONE AMPLIFIER WITH ADJUSTABLE GAIN
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TPA6138A2PW
Active40-MW, STEREO, ANALOG INPUT HEADPHONE AMPLIFIER WITH ADJUSTABLE GAIN
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | TPA6138A2PW |
|---|---|
| Features | Depop, Mute, Short-Circuit Protection, Differential Inputs |
| Max Output Power x Channels @ Load | 40 mW |
| Max Output Power x Channels @ Load [custom] | 2 |
| Max Output Power x Channels @ Load [custom] | 32 Ohm |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Output Type | Headphones, 2-Channel (Stereo) |
| Package / Case | 14-TSSOP |
| Package / Case [custom] | 0.173 " |
| Package / Case [custom] | 4.4 mm |
| Supplier Device Package | 14-TSSOP |
| Type | Class AB |
| Voltage - Supply [Max] | 3.6 V |
| Voltage - Supply [Min] | 3 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Bulk | 1 | $ 0.68 | |
| 10 | $ 0.61 | |||
| 90 | $ 0.47 | |||
| 270 | $ 0.44 | |||
| 540 | $ 0.39 | |||
| 1080 | $ 0.36 | |||
| Texas Instruments | TUBE | 1 | $ 1.13 | |
| 100 | $ 0.77 | |||
| 250 | $ 0.59 | |||
| 1000 | $ 0.40 | |||
Description
General part information
TPA6138A2 Series
The TPA6138A2 is a pop-free stereo headphone amplifier designed to allow the removal of the output dc-blocking capacitors for reduced component count and cost. The device is ideal for single-supply electronics where size and cost are critical design parameters.
Designed using TI’s patented DirectPath™ technology, The TPA6138A2 is capable of driving 25 mW into a 32-Ω load with 3.3-V supply voltage. The device has differential inputs and uses external gain-setting resistors that supports a gain range of ±1 V/V to ±10 V/V. Gain can be configured individually for each channel. The device can also be configured as a second-order low-pass filter and is ideal for interfacing with PWM audio sources. Audio output compiles with ±8-kV IEC ESD protection, requiring just a simple resistor-capacitor ESD protection circuit. The TPA6138A2 has built-in active-mute control for pop-free audio on/off control. The TPA6138A2 has an external undervoltage detector that mutes the output when the power supply is removed, ensuring a pop-free shutdown.
Using the TPA6138A2 in audio products can reduce component count considerably compared to traditional headphone amplifiers. The TPA6138A2 does not require a split-rail power supply or a dc blocking capacitor. The TPA6138A2 integrates its own charge pump to generate a negative supply rail that provides a clean, pop-free ground-biased audio signal.
Documents
Technical documentation and resources