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Digitally Controlled Potentiometers – Also known as: DCP, RDAC, Variable Resistor, Voltage Divider, Digital Pot, Digital Potentiometer
Intersil offers the widest selection of low-to-high resolution digitally controlled potentiometers in single dual and quad configurations. Available in both linear and non-linear tapers, these digital potentiometers replace mechanical potentiometers and trim resistors in applications where digital control allows microprocessor interfacing and extended functionality.
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Various configurations are available for the Digital Potentiometers. They are very easy to integrate due to their small sizes and easy accessibility.
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SMP9210/9211/9212 Dual 10-Bit Nonvolatile DAC
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.
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The new high resolution digital potentiometer with electronic impulse generation is a
rotary encoder for setting of digital datas. At the output of the electronic encoders
2x512, 2x256, or 2x128 rectangular impulses per output and rotation are at the
user's disposal. The digital potentiometer can also delivererd with a index signal
per turn. The 90° dephased outputs enable the control system to recognize the
direction. The EBE encoders with its high protective system is also applicable under
critical conditions.
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austriamicrosystems provides a wide range of digital potentiometers for electronic adjustment of system parameters. Better resolution, lower noise and higher robustness make them superb replacements for their mechanical counterparts.
AS1500: Digital potentiometer, 256 steps, serially interfaced 10k%u03A9
AS1501: Digital potentiometer, 256 steps, serially interfaced 20k%u03A9
AS1502: Digital potentiometer, 256 steps, serially interfaced 50k%u03A9
AS1503: Digital potentiometer, 256 steps, serially interfaced, 100k%u03A9
AS1506: 256-Tap Digital Potentiometer with SPI Interface and High Endurance EEPROM
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