DS1868S-100+T&R

Digital Potentiometers Overview

The DS1868S-100+T/R is a dual digital potentiometer IC from Analog Devices/Maxim Integrated, featuring two independent 256-position resistive elements with a nominal end-to-end resistance of 100 kΩ. It operates on a single +5V supply or ±3V configuration and utilizes a 3-wire serial interface (RST, CLK, DQ) for setting and reading wiper positions via an internal 17-bit I/O shift register. The device supports stacked configurations to double total resistance while maintaining resolution, and allows cascading multiple units over a single bus. Packaged in a 16-pin SOIC, it provides temperature-compensated linearity within ±0.3 LSB relative error.

Digital Potentiometers Feature Summary

• Dual digitally controlled potentiometers with 256 tap positions each
• 3-wire serial interface for independent control and status reading
• Stackable design allowing series connection for increased total resistance
• Cascading capability for multi-device daisy-chain control

Digital Potentiometers Applications

• Variable gain amplifier circuits
• Fixed gain attenuator configurations
• Multi-channel signal conditioning systems

Digital Potentiometers Procurement Notes

Verify the specific suffix '+T/R' against the manufacturer's official documentation to confirm tape-and-reel packaging specifications. Confirm that the 'S' designation aligns with the 16-pin SOIC package variant listed in the datasheet. Ensure compatibility with industrial temperature ranges (-40°C to +85°C) for the intended application environment.

Digital Potentiometers Selection Notes

Select this component when precise digital adjustment of high-resistance signals (100 kΩ) is required without mechanical wear. The 100 kΩ value suits applications where lower current draw is preferred. Consider the stacked feature if higher resistance values are needed without changing the part number. Verify that the system logic levels match the specified input voltage thresholds for reliable serial communication.

Digital Potentiometers Part Context

This component belongs to the DS1868 family of dual digital potentiometers, which also includes variants with 10 kΩ and 50 kΩ nominal resistances. The family shares identical pinouts and serial protocol characteristics across different resistance values. The DS1868 is designed as a solid-state replacement for mechanical potentiometers in environments requiring durability and programmability.

Digital Potentiometers Replacement Considerations

Direct functional replacements include other DS1868 variants (DS1868-10, DS1868-50) differing only in resistance tolerance. Cross-family comparisons should focus on devices offering dual 256-position pots with 3-wire serial interfaces and similar SOIC-16 packaging constraints.