Summary of 2-Channel Digital Potentiometer
The DS1868B is a dual 256-position digital potentiometer replacing the discontinued DS1868. It features independent or stacked operation, controlled via a 3-wire serial interface with low standby current of 2µA. Designed for flexibility, it operates on single +5V or dual ±3V supplies and supports applications like impedance matching, gain control, and programmable filters.
Parts used in the DS1868B Project:
- Dual 256-Position Digital Potentiometers
- Internal Control Logic Unit
- 3-Wire Serial Port Interface
- Wipers Digitally Set and Read
- Series Connected Resistors
Description
The DS1868B 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 DS1868B dual digital potentiometer replaces DS1868, which has been discontinued. The device is designed for flexibility, operating from a single +5V or dual ±3V supply. Maximum standby current is only 2µA.
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.
Key Features
|
Applications/Uses
|
For more detail: 2-Channel Digital Potentiometer
-
What replaces the discontinued DS1868?
The DS1868B dual digital potentiometer replaces the discontinued DS1868. -
How many positions do the potentiometers have?
The device contains two 256-position digital potentiometers. -
Can multiple devices be linked together?
Yes, multiple DS1868s can be linked or daisy-chained for control by a single processor. -
What are the available operating supply voltages?
The device operates from a single +5V or dual ±3V supply. -
What is the maximum standby current consumption?
The maximum standby current is only 2µA. -
Does the device support increasing total resistance?
Yes, resistors connected in series provide increased total resistance and number of taps. -
What is the operating temperature range?
The operating temperature range is -40°C to +85°C.
