TSM9938HEUK+

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TSM9938HEUK+ Application Field and Working Principle

The TSM9938HEUK+ is a high-performance, low-noise instrumentation amplifier designed for use in audio, biomedical and industrial applications. This amplifier is suitable for linear-amplitude measurement, low-level signal detection, and accurate DC measurement applications.

The TSM9938HEUK+ is a two-stage amplifier consisting of a differential amplifier and a differential-to-single-ended amplifier, operating on a positive supply. It is a low-gain amplifier, typically amplifying input signals in the range of 0 - 1V. It is capable of providing a gain of up to 40dB with a relatively low power consumption. The TSM9938HEUK+ is equipped with a variable gain control to fine-tune the gain to match the application.

Key Features

• High precision and low noise performance
• Low gain range of 0-10V and a maximum gain of 40dB
• Differential input and output
• Compact package for easy mounting
• Programmable gain control
• Thoroughly characterized within the operating temperature range

Applications

• Linear-amplitude measurement
• Low-level signal detection
• Accurate DC measurement
• Precision audio applications
• Biomedical and medical applications
• Industrial applications

Working Principle

The TSM9938HEUK+ operates with a single positive supply of up to 15V, in order to provide the necessary power consumption to drive the various internal circuits. The amplifier has a differential input stage which amplifies the input signal according to the gain selected by the gain control. This signal is then amplified by the differential to single-ended amplifier where the output voltage is equal to the input voltage multiplied by the gain. This provides a reduction in noise and improves signal accuracy.

The TSM9938HEUK+ contains two separate gain control circuits. The first is an external gain control voltage applied to the input pins to select the gain. The gain is adjusted by the external control voltage. The second is the internal gain control which is used to set the output voltage of the amplifier. It is possible to set the gain of the amplifier up to 40dB with this control.

The TSM9938HEUK+ is designed for low noise performance, with a noise floor of typically 80nV/√Hz. This ensures high signal-to-noise ratio and excellent input signal fidelity. The amplifier is protected from short circuit and effectively short circuits this pin to ground level. It can operate over the operating temperature range of -20°C to 70°C. The module is provided with a thermal pad for better heat dissipation.

In summary, the TSM9938HEUK+ is an excellent low-noise instrumentation amplifier suitable for linear-amplitude measurement, low-level signal detection, and accurate DC measurement applications. Its high precision and low noise performance, along with its wide range of gain control and its compact size make it well suited for many applications.

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