DS1267

Ultra-low power consumption, quiet,pumpless design
Two digitally controlled, 256-positionpotentiometers
Serial port provides means for setting andreading both potentiometers
Resistors can be connected in series toprovide increased total resistance
14-pin DIP, 16-pin SOIC, 20-pin TSSOPpackages
Resistive elements are temperaturecompensated to ±0.3 LSB relative linearity
Standard resistance values:
   -DS1267-10 ~ 10 k
   -DS1267-50 ~ 50 k
   -DS1267-100 ~ 100 k
Operating Temperature Range:
   -ndustrial: -40 to +85

The DS1267 Dual Digital Potentiometer Chip consists of two digitally  controlled, solid-statepotentiometers. Each otentiometer is composed of 256 resistive sections. Between each resistive sectionand both ends of the otentiometer are tap points which are accessible to the wiper. The position of thewiper on the resistive array is set by an 8-bit value that controls which tap point is connected to the wiperoutput.  Communication and control of the device are accomplished via a 3-wire serial port interface.This interface allows the device wiper position to be read or written.

Both potentiometers can be connected in series (or stacked) for an increased total resistance with thesame esolution. For multiple-device, single-processor environments, the DS1267 can be cascaded ordaisy-chained.  This feature provides for control of multiple devices over a single 3-wire bus.

The DS1267 is offered in three standard resistance values which include 10, 50, and 100-kohm versions.Available packages for the device include a 14-pin DIP, 16-pin SOIC, and 20-pin TSSOP.