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Data Acquisition - ADCs/DACs - Special Purpose

The ICL7135C AI is a special type of application-specific integrated circuit (ASIC) developed and produced by Intersil that includes three integrated devices in a single package: analog-to-digital-converters (ADC), a data acquisition system and a controller. This specialized chip is mainly used in data acquisition systems for a range of applications, from automotive systems to medical and industrial equipment.

Application Fields

ICL7135C AI is designed primarily for automotive applications, as it can interface with an array of sensors, as well as provide data acquisition and processing in real-time. Some of the automotive applications it is used in include powertrain control, in-vehicle entertainment systems, electro-mechanical control systems and brake systems. An automotive diagnostics applications, it is suitable for as a tool for on-board vehicle diagnostics, data plumbing for vehicle performance and for collecting data for after-vehicles-treatment.

Apart from automotive application, ICL7135C AI can also be used in the medical and industrial fields. One of its application areas is medical test equipment, where it is a vital component of blood analysis and detection systems, as well as oxygen and circulation monitoring systems. In the industrial sector, it is used in systems that require signal conditioning and signal processing. For instance, it can be used to provide temperature and sound level readings, and it also has a significant role in providing regulated power to an array of electrical components.

Working Principle

The ICL7135C AI consists of three integrated circuits packaged in one single component: an ADC, a data acquisition system and a controller. It is based on a delta-sigma converter, which works in a two-step process. During the first step, the signal to be processed is converted from an analog voltage or current into a digital signal. This is followed by a second step, in which the conversion is refined by a high-resolution ADC. This two-step process enables ICL7135C AI to convert analog signals with high accuracy, even when operating with low power.

Apart from its two-step conversion process, the ICL7135C AI also includes advanced features such as self-calibration, which allows it to accurately measure signals without the need for external correction. In addition, it can handle a wide range of frequencies, enabling it to measure signals ranging from 0 Hz to 1 MHz without requiring a separate signal filter. The ADC also has an 8-bit digital-to-analog converter, which makes it ideal for low-frequency signals.

The ICL7135C AI also possesses a range of interface and control capabilities that make it suitable for various applications. For instance, it has programmable input/output port mapping, which allows users to easily connect to it from external devices. It also has an integrated temperature sensor, which makes it ideal for temperature monitoring applications. Finally, the ICL7135C AI features a high-speed, 8-bit serial interface, which allows users to access data through any standard communication port.

Conclusion

The ICL7135C AI is an application-specific integrated circuit from Intersil that offers a comprehensive solution for data acquisition, processing and control tasks. It is mainly used in automotive, medical and industrial applications, as it can accurately convert analog signals into digital signals. Featuring an 8-bit ADC, a temperature sensor and an 8-bit serial interface, the ICL7135C AI is an excellent choice for a range of applications.

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