DS1845E-100

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Data Acquisition - Digital Potentiometers are useful for a variety of applications, including those requiring manually adjustable resistance settings. The DS1845E-100 is a high precision, digitally programmable, linear taper electronic potentiometer that is ideal for this type of use. The compact size and low-power requirements make it suitable for use in a range of applications, including instrumentation and audio control systems.

Features

The DS1845E-100 is a three-terminal digital potentiometer which is programmable to provide a resistance in 100 steps from 0 to 100KΩ (with one KΩ resolution). It features low power requirements, low thermal stability and low temperature drift. The resistance range is digitally selectable and its linear ramp characteristics provide for a smooth transition between values. Additionally, this device is self-calibrating and offers reliable performance over a wide temperature range.

Applications

Due to its flexibility, the DS1845E-100 is suitable for a wide range of applications including:

• Volume and sound control: The device is ideal for audio control applications, as well as other types of sound system controls, such as electronic organ and surround sound systems.
• Instrumentation: The device can be useful for instrumentation and control applications, such as tuning and adjustment.
• Industrial control: In industrial applications, the device can be used to control the current or voltage supplied to actuators and motors.
• Test and measurement: The device is useful for automated test equipment, providing accuracy and repeatability.

Working Principle

The DS1845E-100 is a 3-terminal, digitally programmable linear taper electronic potentiometer. It uses a junction field effect transistor (JFET) in order to control the resistance setting. This enables it to digitally adjust the resistance setting with a single digital signal. The control logic consists of a single resistor, a JFET and an internal register, which is controlled by the digital signal.

When a digital signal is applied to the DS1845E-100, the internal register stores the value so that the resistance setting is permanently set. The resistance is then adjusted in 100 steps from 0 to 100KΩ, with one KΩ resolution. The resistance is set by the resistance of the JFET and the voltage associated with the digital signal. This ensures that the resistance is set to the precise value desired.

Conclusion

The DS1845E-100 is a high precision, digitally programmable, linear taper electronic potentiometer that is suitable for a wide range of applications. It is ideal for audio control, instrumentation and control and industrial control systems. Furthermore, its low power requirements, low thermal stability and low temperature drift make it a good choice for applications requiring tight control. Finally, its compact size and self-calibration features ensure reliable performance over a wide temperature range.

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