Overview
The TPA152DR, produced by Texas Instruments, is a 75-mW stereo audio power amplifier designed for high-fidelity audio applications. It is capable of delivering less than 0.1% Total Harmonic Distortion plus Noise (THD+N) at 1 kHz when driving a 32-Ω load. This amplifier is ideal for use as an output buffer for audio CODECs in PC systems and as a high-performance headphone/line-out amplifier. It features integrated depop circuitry to reduce transients during power-up, power-down, and mute mode, and it includes thermal and short-circuit protection for reliability.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VDD) | 5 | 6 | V | ||
| Output Power (each channel) | THD ≤ 0.03%, Gain = 1, RL = 32 Ω | 75 | mW | ||
| THD+N | PO = 75 mW, 20 Hz–20 kHz, Gain = 1, RL = 32 Ω | 0.2 | % | ||
| Input Impedance | >1 MΩ | Ω | |||
| Supply Ripple Rejection Ratio | 1 kHz, CB = 1 µF | 65 | dB | ||
| Mute Attenuation | 110 | dB | |||
| Signal-to-Noise Ratio (SNR) | VO = 1 V(rms), Gain = 1 | 104 | dB | ||
| Noise Output Voltage | VDD = 5 V, BW = 10 Hz to 22 kHz | 6 | µV(rms) |
Key Features
- High-fidelity line-out/headphone driver with less than 0.1% THD+N at 1 kHz into a 32-Ω load.
- PC power supply compatible.
- Integrated depop circuitry to reduce transients during power-up, power-down, and mute mode.
- Internal mid-rail generation and thermal and short-circuit protection.
- Surface-mount packaging in an 8-pin SOIC (D) package.
- Pin compatible with TPA302.
- Externally configurable gain using two resistors per input channel without requiring external compensation for settings of 1 to 10.
Applications
The TPA152DR is suitable for various high-performance audio applications, including:
- Output buffer for audio CODECs in PC systems.
- High-performance headphone and line-out amplifiers.
- Audio systems requiring low THD+N and high signal-to-noise ratio.
- Portable audio devices where high fidelity and low power consumption are critical.
Q & A
- What is the typical output power of the TPA152DR?
The TPA152DR can deliver up to 75 mW per channel into a 32-Ω load with less than 0.1% THD+N at 1 kHz. - What is the input impedance of the TPA152DR?
The input impedance is greater than 1 MΩ. - How is the gain of the TPA152DR configured?
The gain is externally configured using two resistors per input channel according to the equation Gain = RF / RI. - What type of protection does the TPA152DR have?
The TPA152DR includes thermal and short-circuit protection. - What is the purpose of the mid-rail bypass capacitor (CB) in the TPA152DR?
The mid-rail bypass capacitor serves several important functions, including reducing transients during startup or recovery from shutdown mode. - What is the supply ripple rejection ratio of the TPA152DR?
The supply ripple rejection ratio is 65 dB at 1 kHz with CB = 1 µF. - How does the depop circuitry in the TPA152DR work?
The depop circuitry reduces transients during power-up, power-down, and mute mode. - What is the signal-to-noise ratio (SNR) of the TPA152DR?
The SNR is 104 dB with VO = 1 V(rms) and Gain = 1. - What is the noise output voltage of the TPA152DR?
The noise output voltage is 6 µV(rms) with VDD = 5 V and BW = 10 Hz to 22 kHz. - What type of packaging does the TPA152DR use?
The TPA152DR is packaged in an 8-pin SOIC (D) package.
