DS1868S-100+

Digital Potentiometers Overview

The DS1868S-100+ is a dual digital potentiometer chip featuring two independent, digitally controlled 256-position resistive elements. Each element provides a nominal end-to-end resistance of 100 kΩ with ±20% tolerance. The device utilizes a 3-wire serial interface (RST, CLK, DQ) for setting and reading wiper positions via an internal 17-bit I/O shift register. It supports +5V or ±3V operation within an industrial temperature range of -40°C to +85°C. Key features include stacked configuration capability for increased total resistance and cascade/daisy-chain functionality for multi-device control.

Digital Potentiometers Feature Summary

• Dual 256-position potentiometers with 100 kΩ nominal resistance
• 3-wire serial interface for wiper position control and status reading
• Stacked configuration option to double total resistance while maintaining resolution
• Cascade port output (COUT) enables daisy-chaining multiple devices

Digital Potentiometers Applications

• Variable gain amplifier circuits
• Fixed gain attenuator configurations
• Multi-channel volume or tone control systems
• Calibration networks requiring precise resistance adjustment

Digital Potentiometers Procurement Notes

Verify the specific package suffix against the datasheet; 'S' denotes the 16-pin SOIC package. Confirm supply voltage requirements (+5V or ±3V) match the target circuit design. Check for availability as this component may be subject to discontinuation notices from Analog Devices/Maxim Integrated.

Digital Potentiometers Selection Notes

Select the DS1868S-100+ when dual isolated 100 kΩ digital pots are required. Choose the S suffix for surface-mount SOIC assembly. Consider the DS1868-50 or DS1868-10 variants if lower resistance values are needed. Ensure the application supports the 3-wire serial protocol timing constraints.

Digital Potentiometers Part Context

The DS1868 belongs to the Maxim Integrated/Dallas Semiconductor digital potentiometer family. It is functionally similar to the DS1869 but offers dual channels instead of single. The '100' indicates the 100 kΩ resistance value, while 'S' specifies the 16-pin SOIC package type.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements include other DS1868 variants with different resistance values (DS1868-50+, DS1868-10+) or packages (DS1868B-100+ for DIP). Verify that any substitute maintains the 3-wire serial interface compatibility and electrical characteristics.