DS1844E-010

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Data Acquisition - Digital Potentiometers

Digital potentiometers are electronic components that mimic the action of manual potentiometers. The DS1844E-010 is one such digital potentiometer, designed with a constant current, self-repeating incremental wiper movement, and nonvolatile memory, which is capable of utilizing low current to self-program and store a specific resistive value for both the source and drain terminals. The DS1844E-010 provides reliable and cost-effective solutions for those applications requiring adjustable manual or remote control of current flows.

Applications of DS1844E-010

The DS1844E-010 is a monolithic device with a wide application range. In addition to being universally employed for manual and digitally controlled potentiometric controls, the DS1844E-010 is extensively used in a wide variety of industrial, medical and electrical systems, such as:

• Motor control equipment
• Industrial control equipment
• Switching/multiplexer circuits
• Logic arrays
• Digital Audio
• Battery chargers
• Switchgear and Distribution systems
• Programmable Logic Controllers (PLCs)
• Lighting systems
• Automated Testing Equipment (ATEs)

In addition, the DS1844E-010can also be used in signal conditioning and signal processing systems, such as frequency synthesizers and amplitude modulation/demodulation systems.

Working Principle of the DS1844E-010

The DS1844E-010 digitally tunes the Vout terminal based on its programming capacity. This is achieved by having one digital input/output port and three digital input nodes connected to the device. Programmed via the three digital input nodes, a low-current pulse signal will cause the wiper of the device to move in a definite direction, which ultimately adjusts the value of Vout. Since the DS1844E-010 is equipped with nonvolatile memory, it can retain the programmed settings at power-down conditions.

The DS1844E-010 also provides the necessary stability to the system by utilizing a programmable nonlinear adjustment feature. By programming the nonlinear adjustment register of the device, the output deviation can be effectively reduced when compared to manual potentiometers. This is especially helpful when used in multi-channel systems, as the difference in readings obtained by each channel can be minimized, leading to increased system stability.

Conclusion

The DS1844E-010 is a highly-functional digital potentiometer suited for a wide range of applications, ranging from motor control equipment to automated testing equipment. Its primary benefit is that it provides greater system stability through its nonlinear adjustment register, while its memory allows it to maintain programming even in the event of power outage. As a result, the DS1844E-010 is one of the most cost-effective solutions for those requiring both manual and digital control of current flows.

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