AS1503-T

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Data Acquisition - Digital Potentiometers

The AS1503-T is a 5-bit digital potentiometer that operates in the range of 4.75V to 10V. It is composed of a three-wire voltage supply, a five-wire fixed resistance potentiometer, and a Vcc/Ground return power supply.

The fixed resistance potentiometer is composed of five separate resistors with individual fixed values of 500Ω, 1kΩ, 2kΩ, 4kΩ, and 8kΩ. The resistance can be adjusted by simply setting the non-inverted input pin to the desired value.

The AS1503-T is designed for low-power applications, with a reported power consumption of 12uA at +5V. It operates in the frequency range of 1kHz to 20kHz, making it suitable for a variety of applications. The low power consumption, wide operating range and 5-bit resolution make the AS1503-T an ideal choice for digital pot applications.

Applications

The AS1503-T can be used for a variety of low-power data acquisition applications, such as signal conditioning, high precision control, and voltage monitoring. As an example, it can be used to monitor changes in voltage levels in an amplifier circuit for signal conditioning. The digital potentiometer can also be used to adjust the gain of an amplifier, allowing precise control over the voltage levels of the signal.

In addition, the AS1503-T can be used in audio applications to control the volume of a signal. A digital potentiometer can be used in place of a mechanical potentiometer, allowing more precise adjustments and more reliable control.

Finally, the AS1503-T can be used to provide feedback into a microcontroller or CPU, enabling the controller to monitor the voltage levels of an external circuit. The digital potentiometer can be used to adjust the output of a digital port or other application specific usage.

Working Principle

The working principle of the AS1503-T is relatively simple. The three-wire voltage supply accepts a level of approximately 4.75V to 10V. This level is then divided into five levels with five resistors, each having a fixed value of 500Ω, 1kΩ, 2kΩ, 4kΩ, and 8kΩ.

The non-inverted input pin of the AS1503-T is connected to the adjust pin of each resistor. By adjusting the non-inverted input pin, the difference between the voltage supplied to the adjust pin and the reference voltage can be adjusted. By doing so, the current drawn through each resistor can be adjusted.

By changing the current drawn through each resistor, the resistance of the overall circuit can be changed. This in turn allows the voltage levels at the output of the potentiometer to be adjusted.

The AS1503-T can be used to provide a feedback signal that can be used to adjust the voltage requirements of an external circuit, or to monitor changes in voltage levels. It can be used to provide signals for signal conditioning, high precision control, and voltage monitoring.

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