DS1804U-100

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Digital potentiometers are important components in many data acquisition applications as they enable engineers to make precise adjustments to voltages and other signals. The DS1804U-100 is a popular digital potentiometer manufactured by Dallas Semiconductor. This device has been widely used in applications such as cell phones, joysticks, computers, remote control systems, and digital audio systems. This article will discuss the application field and working principle of the DS1804U-100.

The DS1804U-100 is a dual, 128-position digital potentiometer. Its adjustable resistance and adjustable voltage ratios make it suitable for many different applications. It also has a number of features that make it attractive for data acquisition and other applications. These include its low power consumption, low output impedance, high accuracy and temperature stability. The device is available in either an 8-pin or 16-pin package and is available in a 4×4, 6×4 or 8×4 pinout.

In terms of its application field, the DS1804U-100 is typically used in conditioning, switching, buffering and programming of signals. This includes applications such as filtering, level shifting, analog multiplying, signal processing, and digital signal conditioning. In addition, it can be used in applications such as DC offset trimming, voltage scale Trim, and voltage regulation. It is also commonly used in digital audio systems, remote control systems, cell phones, joysticks, and computers.

The DS1804U-100’s working principle is quite simple. It consists of four resistance elements, each of which has sixteen adjustable taps. Each element’s resistance can be adjusted by setting the taps in different combinations, thus forming a desired resistance ratio. The resistance of each element is connected in series with its adjacent elements, forming a total adjustable resistance of 0.7Ω.

To make adjustments to the DS1804U-100, a logical “0” or a logical “1” is sent to the device, which signals the adjustment of the taps. Depending on the set of logical signals being sent, the taps will be adjusted in different combinations. The adjusted resistance can then be read from the readback pins of the device. The user can also choose to adjust the resistance values externally via the Wiper pin, which can be programmed in order to achieve specific resistance values.

In summary, the DS1804U-100 digital potentiometer is a useful component for a wide variety of data acquisition and other applications. Its adjustable resistance and adjustable voltage ratios make it suitable for signal conditioning, switching, buffering and programming. Its low power consumption, low output impedance, high accuracy, and temperature stability make it attractive for a number of applications. Its simple working principle also makes it easy to use.

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