DS1867E-50+

Digital Potentiometers Overview

The DS1867E-50+ is a dual digital potentiometer IC manufactured by Analog Devices Inc./Maxim Integrated. It features two independent 256-position wiper settings controlled via a 3-wire serial interface. The device utilizes EEPROM memory to maintain wiper positions during power loss, ensuring nonvolatile operation. It operates from a single +5V supply or ±5V supplies, with a recommended voltage range of 4.5V to 5.5V. The total end-to-end resistance for each potentiometer is 50 kΩ. Key electrical characteristics include a typical supply current of 900 µA and an operating temperature range of -40°C to +85°C.

Digital Potentiometers Feature Summary

• Dual 256-position digitally controlled potentiometers with nonvolatile EEPROM storage
• 3-wire serial interface (RST, CLK, DQ) for setting and reading wiper positions
• Stackable configuration allows doubling total resistance while maintaining resolution
• Cascading capability enables control of multiple devices from a single processor

Digital Potentiometers Applications

• Inverting variable gain amplifiers
• Fixed gain attenuators
• System calibration requiring persistent adjustment values

Digital Potentiometers Procurement Notes

Verify the specific package type required for the DS1867E-50+, as the datasheet lists 14-pin DIP, 16-pin SOIC, and 20-pin TSSOP options. Confirm that the '+ ' suffix indicates compliance with current environmental standards if applicable to the manufacturing lot. Ensure the design accommodates the 4ms minimum power-down time required for reliable EEPROM data storage.

Digital Potentiometers Selection Notes

Select the DS1867E-50+ when a 50 kΩ resistance value is required. Consider the stacked configuration if higher total resistance is needed without changing resolution. Verify that the system can provide the necessary 4ms power-down window to preserve settings. Check absolute linearity specifications (±0.75 LSB typical) against application tolerance requirements.

Digital Potentiometers Part Context

The DS1867 series serves as the nonvolatile counterpart to the volatile DS1267 digital potentiometer family. It retains wiper positions using internal EEPROM arrays, eliminating the need for external memory components. The device supports both single-ended and differential substrate bias configurations for flexible supply compatibility.

Digital Potentiometers Replacement Considerations

The DS1267 is the volatile equivalent within the same family but lacks EEPROM retention. Other DS1867 variants offer different resistance values (e.g., DS1867-10 for 10 kΩ, DS1867-100 for 100 kΩ). Package-specific replacements depend on the selected footprint (DIP, SOIC, or TSSOP).