DS1866Z+

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Data Acquisition - Digital Potentiometers

The DS1866Z+ is a digital potentiometer (digital pot) produced by Dallas Semiconductor. It is one of the most popular digital pots available, and is used in many industries. It provides a highly programmable, efficient and reliable way of controlling analogue devices.

Application Field

The DS1866Z+ is used in a wide variety of applications. It is ideal for industrial, automotive and audio applications where precise, reliable and cost effective control is necessary. It is also used in many medical and laboratory instruments for accurate data acquisition. Other application fields of the DS1866Z+ include:

• Controlling amplifier gain in amplifiers, equalizers and automotive audio systems.
• Controlling the frequency response of loudspeakers.
• Controlling lighting effects and dimmer switches in theatre and stage lighting.
• Automation and process control.
• Industrial multiturn potentiometers.
• Controlling voltage regulators and switch mode power supplies.
• Automatic exposure control for cameras and other exposure systems.
• Frequency control for radios, satellite transmitters and other communications devices.
• Adjustment of mechanical devices such as valves, motors, drives and pumps.
• Simulation systems such as virtual reality headsets.

Working Principle

The DS1866Z+ is a variable variable resistance device with a built-in output amplifier. It has four programmable taps and a variable resistance element with up to five times the resolution of other digital potentiometers. The taps are connected to the input signal, and the output signal is obtained by varying the resistance of the internal element. The wiper voltage can be adjusted to any value between 0 and Vdd with a 12-bit or 15-bit precision. This allows for precise control of the required signal.

The digital pot can be programmed using a simple digital interface. This interface can be connected to a PC for easy programming and control. The interface protocol supports the standard SPI, I2C and a proprietary, two-wire serial communications protocol. The output is compatible with the majority of integrated circuits.

The DS1866Z+ is built with enhanced safety measures and is single-channel, RoHS compliant. It is supplied in 10-pin plastic DIP and 16-pin SOIC packaging. The digital pot can also be supplied as a system on a chip for easy integration into existing systems. It requires only a few external components to operate and is protected against shorts and overcurrent.

Conclusion

The DS1866Z+ is a powerful, reliable and efficient digital potentiometer which is widely used in many applications. It offers a high resolution and accuracy and is protected against shorts and overcurrent. Its simple digital interface makes it easy to integrate with other systems. Its combination of features and affordability makes it an excellent choice for controlling analogue devices and as a general purpose programmable signal source.

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