ISL28617FVZ

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The ISL28617FVZ is a high-performance, low-noise, low-distortion, instrumentation amplifier designed to meet the stringent requirements of a broad range of applications.

It is part of the Instrumentation Amplifier family from Intersil that includes a wide range of capabilities as well as several package options.

In order for a device to perform optimally in any application, it is essential to understand the working principles and performance characteristics of the component. This article will discuss the application field of the ISL28617FVZ, as well as its working principle.

Application Field of the ISL28617FVZ

The ISL28617FVZ is well-suited for precision signal conditioning, data acquisition, and instrumentation applications such as medical instrumentation, audio processing, transducer amplifiers, communication equipment and automotive test equipment.

It offers a very high common-mode rejection ratio (CMRR) of 76 dB and an open-loop gain of 95 dB, making it capable of very accurate signal conditioning even in noisy environments with large common-mode signals. Its wide bandwidth of up to 4MHz and its low distortion of -112 dBc make it suitable for high-speed and precision applications.

It features a low input offset voltage of ±650 μV, making it ideal for low-level signals. Its high slew rate of 105V/μs allows it to accurately capture fast transitioning signals. It also offers a very low power consumption of only 1.5mA and is available in small packages.

Working Principle of the ISL28617FVZ

The ISL28617FVZ operates in the non-inverting unity-gain configuration and can be used as a gain block for up to 20 V/V. It consists of a two-stage amplifier topology that has two input pins, one for the inverting and one for the non-inverting input signal. Both of these inputs are then amplified and combined together.

The first stage is a high-gain, low-noise rail-to-rail differential amplifier that accepts a wide common-mode voltage range. It converts the input signals into a differential signal and then it is passed through a 2nd stage with a gain of two, providing a gain of up to 20 V/V.

The signal is then amplified further, filtered and converted into a single-ended signal. This signal is then buffer-amplified, resulting in a signal with a high common-mode rejection ratio and low distortion. The entire signal chain is protected against overloads and ground skips, ensuring a robust and reliable performance.

The ISL28617FVZ is also capable of being operated from a single supply, allowing it to be used in low-power applications. Furthermore, it also provides a high input impedance and low output impedance, resulting in low noise and high output current.

Conclusion

By understanding the application field and working principle of the ISL28617FVZ, users can choose this component appropriately and optimize its performance according to their requirements. It is an excellent choice for precision signal conditioning, data acquisition, and instrumentation applications, due to its high CMRR, extremely low distortion and wide frequency response.

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