DESCRIPTION
The DS1868 Dual Digital Potentiometer Chip consists of two digitally controlled solid-state potentiometers. Each potentiometer is composed of 256 resistive sections. Between each resistive section and both ends of the potentiometer are tap  points which are accessible to the wiper.

FEATURES
Ultra-lowpower consumption, quiet, pumpless design
Two digitally controlled, 256-position potentiometers
Serial port provides means for setting and reading both potentiometers
Resistors can be connected in series to provide increased total resistance
20-pin TSSOP, 16-pin SOIC, and 14-pin DIP packages are available.
Resistive elements are temperature compensated to ± 0.3 LSB relative linearity
Standard resistance values:
-  DS1868-10 ~ 10 kW
-  DS1868-50 ~ 50 kW
-  DS1868-100 ~ 100 kW
+5V or ±3V operation
Operating Temperature Range:
- Industrial: -40°C to 85°C