DS3903E-020+

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The Digital Potentiometers (DPT) are a kind of data acquisition instruments. They are mainly used to measure the voltage and current potentials of the electrical systems. The Digital Potentiometer (DPT) is a kind of variable resistor which is digitally programmable, and can be used to adjust the resistance of a circuit to an appropriate level. It is usually used in the analog circuits engines, industrial automation, and audio processing. This device is used to adjust the resistance of an electrical circuit, such as a circuit that controls a motor speed or volume control of a music system. In general, a digital potentiometer is a three-terminal device, which consists of an "input", a "wiper" and an "output". The input and output terminals are connected to a resistive element, often a conductive film, with the wiper contact acting as a moving contact which varies the relative resistance between the two extremes.

The DS3903E-020+ is a 5-12V digital potentiometer mainly used in the applications of automotive and industrial automation. DS3903E-020+ features a single-pole-single-throw (SPST) switch that interfaces directly with host controllers. It has an internet of thing (IoT) function that can be used for command and control operations, such as remote operation and control, frequency selection and power management. The device is normally connected and left in standby mode, with the output set to a LOW value. The device is equipped with a precision voltage reference, temperature and supply voltage reference, which allows it to accurately measure and adjust the output parameters as per the pre-defined set-points.

The working principle of the device is based on a voltage referenced resistive element. When the input voltage is applied, it triggers the voltage reference that adjusts the resistance level between the two extremes. The output is thus the combination of the input voltage, the variable resistor and the reference voltage. The output can thus be adjusted as per the required level by varying the input voltage. The device is provided with two control pins, one for selecting the control mode and another for controlling the power on/off.

The DS3903E-020+ is an ideal device for applications requiring precision voltage and current control, especially in automotive and industrial automation. It is designed with an integrated temperature sensing architecture which provides an efficient compensation of temperature variations over time. Apart from motor control and voltage regulation, the basic functionalities of the device also include high gain DC-DC conversion, circuit protection, current limiting, and power line noise filtering. Additionally, the device can be used for audio and video line level conversion. As such, the DS3903E-020+ digital potentiometer is a powerful tool for a range of industrial applications & projects.

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