THS3202EVM

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The THS3202EVM evaluation module (EVM), originally available from Texas Instruments, is a comprehensive device designed for characterizing audio amplifiers with a single package. It provides an easy-to-use platform for evaluating audio amplifier performance in various applications, such as audio systems, communication networks, medical devices, and automotive systems. This paper provides a brief overview of the THS3202EVM and its suitable applications, and explains its working principle.

Overview of THS3202EVM

The THS3202EVM is a full evaluation and development system for THS3202 amplifier. It consists of two major building blocks: a THS3202 audio amplifier in small outline package (SOIC) and a THS3202EVM-V1 digital controller. The amplifier is designed to work with audio frequency signals with anti-aliasing sound-pressure-level filters engaged. It provides a balanced signal-to-noise ratio of 90dB at full power output of 0.7W/channel.

The digital controller, THS3202EVM-V1, is a Pmod™ compliant controller board which integrates MSP430F5335 microcontroller, pre-programmed firmware, powering module, and test headers for convenient connection. The controller board allows the user to conveniently configure the amplifier through a USB connection and provides graphical user interface using graphical user interface software, including a PC application software. It can also collect data from the EVM during test simulations and provide feedback for further optimization.

THS3202EVM Application

The THS3202EVM is suitable for use in various audio applications, such as audio systems, communication networks, medical devices, and automotive systems. With its extremely high signal-to-noise ratio and wide range of input voltage options, this versatile device can provide superior performance in any of these applications. With its dual differential inputs, the THS3202EVM is also suitable for use in mono-bridge, stereo, and multi-channel applications.

In terms of audio systems, the product is suitable for high fidelity audio interface systems in both professional and consumer audio systems, including IMAX theaters, motion picture soundtrack recording studios, and audio recorders. It can also be used in voice recognition applications for robotics, and medical diagnosis.

In communication networks, the product is suited for headphone output stages, Bluetooth® accessories, VoIP phones, kiosks and audio conferencing solutions. It is also suitable for active noise control systems in Home Theater systems and other audio applications.

In medical devices, the device can be used for medical imaging systems, ECG and EEG monitoring systems, patient monitoring systems, and biomedical implants.

For automotive systems, the THS3202EVM can be used for high-end bass and treble amplifiers, active crossovers, DSP-based signal processing systems, speaker-level interfaces, and power amplifiers.

THS3202EVM Working Principle

The THS3202EVM is an advanced amplifier which works on the principle of a Voltage Differential Input Network (VDIN). VDIN works by creating two voltage signals, one in each direction, at the input stage. These signals are then compared by a differential amplifier to provide a difference between the two voltages, and the resulting difference is then amplified and used as the output. This type of operation provides a much higher signal-to-noise ratio compared to single-input amplifiers.

The THS3202EVM incorporates many features which enable it to achieve high levels of signal-to-noise ratio and high levels of linearity. These features include integrated digital signal processing (DSP), feed-forward compensator, low-distortion pre-amplifier, high-impedance end-follower, zero-gain ready mode, and so on. All these features together makes the THS3202EVM an ideal audio amplifier suitable for use in various audio applications.

Conclusion

The THS3202EVM is versatile and capable of delivering high-quality audio performance in various audio applications. Its features, such as integrated DSP, feed-forward compensator, pre-amplifier and high-impedance end-follower technology, and output protection circuitry, make it the ideal choice for any audio application. With its wide range of input voltage options and excellent signal-to-noise ratio, it is suitable for use in audio systems, communication networks, medical devices, and automotive systems.

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