DS1868E-100

Digital Potentiometers Overview

The DS1868E-100 is a dual digital potentiometer IC 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, drawing a typical supply current of 400 µA and standby current of 1 µA. 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. Key electrical characteristics include ±20% resistor tolerance, ±0.75 LSB absolute linearity, and a temperature coefficient of 750 ppm/°C. Available in 20-pin TSSOP, 16-pin SOIC, and 14-pin DIP packages.

Digital Potentiometers Feature Summary

• Dual digitally controlled potentiometers with 256 tap positions each
• 3-wire serial interface for data input and output
• Stacked configuration capability to double total resistance while maintaining resolution
• Cascade operation allows daisy-chaining multiple devices from a single processor

Digital Potentiometers Applications

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

Digital Potentiometers Procurement Notes

Verify package availability as the component is offered in 20-pin TSSOP, 16-pin SOIC, and 14-pin DIP variants. Confirm RoHS compliance status through official manufacturer documentation prior to procurement, as environmental certifications may vary by production batch.

Digital Potentiometers Selection Notes

Select the DS1868E-100 when high resistance values (100 kΩ) are required compared to the 10 kΩ or 50 kΩ variants. Ensure the application supports the 3-wire serial protocol timing requirements, specifically the RST active-high initialization and clock synchronization constraints defined in the AC electrical characteristics.

Digital Potentiometers Part Context

The DS1868 belongs to the DS1868 series of dual digital potentiometers. The 'E' suffix typically denotes industrial temperature range (-40°C to +85°C), while '-100' specifies the 100 kΩ resistance value. This part serves as a solid-state replacement for mechanical potentiometers in precision analog signal conditioning applications.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements within the same family include DS1868-50 (50 kΩ) and DS1868-10 (10 kΩ). For different resistance values, verify that the -3 dB cutoff frequency specifications remain adequate for the target application bandwidth.