Digital potentiometer
Summit Microelectronics
INTRODUCTION
The SMP9210, -11, -12 family consists of serial input, voltage output, dual 10-bit (1024 steps) digital-to-analog converters. The devices will recall any Dac output voltage on power up and can operate from a single +2.7V to +5.5V supply. The maximum output Temperature Coefficient (Tc) of ±25ppm/0C make them ideal for high accuracy and temperature stable calibration purposes. Internal precision buffers swing rail-to-rail with an input reference range from ground to the positive supply.
The parts integrate two 10-bit DACs and their associated circuits: an enhanced unity gain operational output amplifier, a 10-bit volatile data latch, a 10-bit nonvolatile data register and the I2C compatible 2-wire serial interface.
The SMP9210 has a Chip Select input to enable/disable communication with the device, the SMP9211 has a Mute input to turn the outputs off and the SMP9212 has a reference voltage output.
Programming of the configuration, control and calibration values by the user is simplified with the interface adapter and Windows GUI software obtainable from Summit Microelectronics.
