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Dual Digital Potentiometer Chip

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Two 256-position digital potentiometers
  • Wipers digitally set and read through serial port
  • EEPROM maintains settings in the absence of power
  • Ultra low-power consumption: max standby current of 1µA
  • 3-wire serial control interface
  • Operating ranges:
    • +5V or ±3V
    • -40°C to +85°C

Applications/Uses

Description

The DS1868 has two 256-position potentiometers, with wiper positions each set as 8-bit values. The potentiometers can be used independently or stacked for increased total resistance and number of taps. Communication takes place through a 3-wire serial port interface that drives an internal control logic unit. Multiple DS1868s can be linked or daisy-chained for control by a single processor.

The DS1868 +5-volt Dual Digital Potentiometer was designed for applications requiring extremely low current consumption and extremely low cost. Maximum standby current is 1µA. The DS1868 is based on DS1267 technology but operates from a single +5-volt or from dual ±3-volt supplies.

Digital potentiometers improve upon mechanical devices with processor control and programmability, greater reliability and accuracy, and packaging options that facilitate automatic assembly. They are used for signal control in modems and phones, battery charging and control circuitry, tuning and calibration, offset trimming of operational amplifiers, gain control, and power supply regulation.

Simplified Block Diagram

DS1868: Block Diagram DS1868: Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .