DS1868BS-100+T/R

Digital Potentiometers Overview

The DS1868BS-100+T/R is a dual digital potentiometer IC from Analog Devices/Maxim Integrated, housed in a 16-pin SO package. It contains two independent 256-position resistive elements with an end-to-end resistance of 100kΩ each. The device operates on a single +5V supply or ±3V supplies and features a 3-wire serial interface (RST, CLK, DQ) for setting and reading wiper positions via an internal 17-bit I/O shift register. Key electrical characteristics include a typical integral nonlinearity of -0.75 LSB and differential nonlinearity of -0.3 LSB. The industrial temperature range spans from -40°C to +85°C.

Digital Potentiometers Feature Summary

• Dual 256-position digitally controlled potentiometers with 100kΩ nominal resistance
• 3-wire serial interface for independent control of wiper positions
• Stacked configuration capability to double total resistance while maintaining resolution
• Cascade operation allows daisy-chaining multiple devices over a single bus

Digital Potentiometers Applications

• Variable gain amplifier circuits
• Fixed gain attenuator configurations
• Multi-device systems requiring centralized digital control

Digital Potentiometers Procurement Notes

Verify component authenticity through authorized channels as the part number indicates a specific packaging variant. Confirm that the 16-pin SO footprint matches the PCB design requirements. Ensure the system voltage aligns with the specified +5V or ±3V operating conditions. Check for updated documentation regarding discontinuation status if sourcing from secondary markets.

Digital Potentiometers Selection Notes

Select this model when a 100kΩ resistance value is required for both channels. Choose the 16-pin SO package for space-constrained designs compared to the 20-pin TSSOP option. Consider the stacked configuration feature if higher total resistance is needed without changing the component count. Verify that the 3-wire serial timing constraints fit within the host microcontroller's capabilities.

Digital Potentiometers Part Context

This component belongs to the DS1868B family of dual digital potentiometers. The 'BS' suffix denotes the 16-pin Small Outline package, while '-100' specifies the 100kΩ resistance value. The '+T/R' suffix indicates RoHS compliance and tape-and-reel packaging. Other variants in the series include 10kΩ and 50kΩ options available in both SO and TSSOP packages.

Digital Potentiometers Replacement Considerations

Direct replacements within the same package and pinout include other DS1868B variants with different resistance values (e.g., DS1868BS-010+T/R or DS1868BS-050+T/R). For different package types, the 20-pin TSSOP versions (DS1868BE-100+T/R) offer equivalent functionality but require layout adjustments.