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DS1802

DS1802 Description

The DS1802 is a digital potentiometer manufactured by Analog Devices Inc./Maxim Integrated, designed for applications requiring precise resistance control. This through-hole mounted IC features a 45kΩ resistance with a logarithmic taper, providing 65 taps for fine adjustment. The device operates within a supply voltage range of 2.7V to 5.5V and offers a typical temperature coefficient of 750ppm/°C. The DS1802 is housed in a 20-pin DIP package and is available in a tube package format. It includes two circuits, each with a typical wiper resistance of 400Ω. The potentiometer is configured to be volatile, meaning it retains its settings only while power is applied. The DS1802 is controlled via a pushbutton or serial interface, offering flexibility in user interaction. Despite its obsolescence, the DS1802 remains a robust solution for applications needing reliable resistance adjustment. It is REACH unaffected and classified under HTSUS code 8542.39.0001, with a moisture sensitivity level of 1 (unlimited).

DS1802 Features

• Resistance and Tolerance: The DS1802 offers a 45kΩ resistance with a ±20% tolerance, providing a wide range of adjustment for various applications.
• Logarithmic Taper: The logarithmic taper allows for fine control over resistance, making it ideal for applications requiring precise adjustments.
• 65 Taps: With 65 taps, the DS1802 provides high-resolution control, enabling precise tuning of resistance values.
• Volatile Memory: The volatile memory ensures that the potentiometer settings are retained only while power is applied, which can be advantageous for applications requiring dynamic adjustments.
• Interface Options: The DS1802 supports both pushbutton and serial interfaces, offering flexibility in control methods.
• Wide Operating Voltage Range: The device operates within a supply voltage range of 2.7V to 5.5V, making it suitable for a variety of power supply conditions.
• Low Wiper Resistance: The typical wiper resistance of 400Ω ensures minimal impact on circuit performance.
• Through-Hole Mounting: The through-hole mounting type facilitates easy integration into existing circuit boards and systems.
• Moisture Sensitivity Level: The MSL of 1 (unlimited) ensures the device is robust against moisture, enhancing reliability in various environmental conditions.

DS1802 Applications

The DS1802 is well-suited for applications requiring precise resistance control, such as:

• Audio Systems: The logarithmic taper and high-resolution control make it ideal for volume control and other audio-related adjustments.
• Medical Equipment: The precise resistance control and wide operating voltage range are beneficial for medical devices requiring accurate calibration.
• Industrial Controls: The robustness and flexibility of the DS1802 make it suitable for industrial applications where reliable resistance adjustment is critical.
• Consumer Electronics: The device can be used in consumer electronics for adjustable settings, such as brightness control or sensor calibration.
• Automotive Systems: The DS1802's ability to operate within a wide voltage range and its moisture resistance make it suitable for automotive applications.

Conclusion of DS1802

The DS1802 digital potentiometer from Analog Devices Inc./Maxim Integrated is a versatile and reliable solution for applications requiring precise resistance control. Its logarithmic taper, wide operating voltage range, and flexible interface options make it suitable for a variety of applications, including audio systems, medical equipment, industrial controls, consumer electronics, and automotive systems. Despite its obsolescence, the DS1802 remains a robust choice for engineers and designers seeking a high-resolution, reliable digital potentiometer.