The TPA112 MSOP Audio Power Amplifier Evaluation Module

3.2.1TPA112 Audio Amplifier IC

The TPA112 audio amplifier IC is a CMOS device intended primarily for high-performance line-level output, headphone driver, and small speaker applications. It is supplied in both a SOIC and a very small surface-mount MSOP package and has been designed to operate from low supply voltages (between approximately 2.5 V and 5.5 V) and to deliver up to approximately 150 mW into 8-Ωspeakers. As a line-level driver, distortion levels (THD+N) are below 0.02% into 10-kΩloads across the audio band (20 Hz to 20 kHz). As a headphone driver, distortion levels are below 1% into 32-Ωloads across the audio band. And as a speaker driver, distortion levels are below 2% into 8-Ωloads across the audio band. Typical applications include portable computers, desktop computers, personal audio, toys, games, and similar audio applications.

The IC includes two separate internal amplifiers with onboard short-circuit and over-temperature protection circuits (Figure 3 –4). The load for each channel is connected between the VO pin and GND through a coupling capacitor. For more information, see the TPA112 amplifier IC data sheet, TI Literature Number SLOS212.

Figure 3–4. TPA112 Amplifier IC

 

 

Short-Circuit

 

 

Protection

 

 

 

2

IN 1–

 

 

 

–

3

 

 

IN 1+

 

 

 

+

 

 

 

6

IN 2–

 

 

 

–

5

 

 

IN 2+

+

Over-Temperature

Protection

VDD 8

VDD

VO1 1

VO2 7

4

3-4

Details

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Texas Instruments SLOU023A manual 1 TPA112 Audio Amplifier IC, TPA112 Amplifier IC
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SLOU023A specifications

Texas Instruments SLOU023A is a technical document outlining the features and specifications of the LMH6629, a high-speed, low-noise operational amplifier designed for various analog applications. This op amp is particularly well-suited for precision signal processing, making it a popular choice in industries such as telecommunications, industrial automation, and medical electronics.

One of the main features of the LMH6629 is its high bandwidth. With a gain bandwidth product of 1.5 GHz, it supports a wide range of frequencies, enabling it to process fast-changing signals without significant distortion. This characteristic is critical in applications that require accurate signal amplification and processing, such as RF and video signal conditioning.

In addition to its high bandwidth, the LMH6629 boasts a low noise figure. The device is designed to minimize noise contribution, ensuring high fidelity in signal processing applications. This low noise performance makes it an excellent choice for use in audio processing, medical instruments where signal fidelity is crucial, and sensor applications where precise measurements are required.

Another notable technology utilized in the LMH6629 is its ability to operate at low supply voltages while maintaining high performance. This feature enhances the amplifier's versatility in battery-powered applications, where power efficiency is key. The op amp can operate with supply voltages as low as ±2.5V, making it suitable for modern low-voltage designs.

Furthermore, the LMH6629 provides excellent power supply rejection and common-mode rejection, which are essential for maintaining signal integrity in noisy environments. These characteristics help reduce the impact of power supply variations and external interferences, ensuring reliable operation in diverse application settings.

The package options for the LMH6629 also contribute to its usability. It comes in various forms including surface-mount packages, allowing for easy integration onto PCBs while optimizing space in compact designs.

In summary, Texas Instruments SLOU023A details the impressive features of the LMH6629 operational amplifier, highlighting its high bandwidth, low noise performance, power efficiency, and versatility in various industrial applications. This amplifier stands out as a reliable component for engineers seeking high-performance solutions in analog signal processing.
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