ISL22319WFU8Z-TK

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Data Acquisition is a process of recording and collecting digital information, with Digital Potentiometers as one of its essential components. The ISL22319WFU8Z-TK (hereinafter referred to as the ISL22319) belongs to this category and exhibits many great features, thus making it an attractive choice in various fields. This article will outline its application field, as well as its working principle.

Application Field

The ISL22319 is a low-cost, low-power, 9-pin DFN-package dual digital potentiometer. Designed to operate over a wide operating temperature range of -40ºC to +125ºC, it is suitable for many industrial, commercial, automotive and other applications. Its excellent performance and small size make it a great choice for high reliability products from motor control, security systems, and comfort or infotainment products.

Some of the popular uses for the ISL22319 are in the automotive domain. It can be used for the calibration of throttle pedal, fuel pressure regulator, and seat position control, as well as in servo motor and climate control systems. Moreover, it is also suitable for industrial applications such as robots, stage lighting, and velocity feedback systems.

Paired with various MCUs such as the popular Atmega328, 8051, or STM32, the ISL22319 is interactive with the environment, even in extreme scenarios. Its compatibility with high speed A/D and D/A converters enable it to perform data acquisition tasks quickly and accurately, with minimal power consumption and extreme reliability. This is why it has been chosen by many companies and enterprises in different fields.

Working Principle

Digital potentiometers are based on a device made of three terminals connected to a resistive element, two of them being the wiper terminals and one being the common output terminal. The resistive element consists of an array of resistors, each connected to two of the wiper terminals, while the other two represent the source voltage and the output voltage. This forms a voltage divider, enabling an output voltage variation when one of the wiper terminals, otherwise called the variable terminal, is adjusted.

The ISL22319 is a low-cost, low-power, 9-pin DFN-package dual digital potentiometer. It consists of two parts: a 5K or 10K linear-taper digital potentiometer and a 7-bit CMOS non-volatile memory. The memory contains the settings for the potentiometer, and the positive logic mode makes it easier to interface the device with other digital systems. A logarithmic output voltage curve is also available, which makes it ideal for low resolution applications, such as adjusting volume on audio amplifiers.

The ISL22319 digital potentiometer provides two wiper terminals, one for each device, with 17 resistance value steps. The digital input interface employs an SPI compatible three-wire serial bus, with the "digital write" command taking only 8 microseconds to complete, allowing continuous tracks. It also features a power-on reset bit which restores the wiper position to a known set-point.

Conclusion

In conclusion, the ISL22319 is a versatile, low-cost, low-power, digital potentiometer suitable for many applications from automotive to industrial. Its application fields range from motor control, security systems, and comfort or infotainment products to robots, stage lighting, and velocity feedback systems. It can be combined with various MCUs for interactive data acquisition tasks and its positive logic mode facilitates communication with other digital systems. The ISL22319 is a great choice for your device.

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