MCP4631-103E/ST

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The MCP4631-103E/ST from Microchip is a digital potentiometer designed for use in a wide range of applications. A digital potentiometer, also known as a digital rheostat, provides precision, programmable digital control of voltage or current, and can be used to measure, control and adjust various parameters such as resistance, gain, frequency, duty cycle, and temperature. The MCP4631-103E/ST is fully integrated, requiring no external components and supports three different resistance values (10KΩ, 5KΩ and 2.5KΩ) with a wide range of wiper/output incidences and features a simple SPI/QSPI interface.

The MCP4631-103E/ST is specifically designed for higher accuracy, precision, and lower power-consumption across a wide temperature range. It has a fixed 10-bit horizontal architecture with a 2x^5+2x^4 resolution configuration, which provides 256 wiper tap-points for a precise control of the output via the SPI/QSPI interface. Additionally, its output impedance is closely matched to an external load as it is specified in the output load vs. wiper position table of the datasheet. Its volatage limitation is 2.7V ± 0.3V and the operating temperature range is -40°C to +85°C.

The MCP4631-103E/ST can be used in a range of applications including the adjustment of gain on bi-quad filters, PID circuit trim applications, and amplifier control. In addition, the MCP4631-103E/ST can be used as a data acquisition device to measure specific parameters such as resistance, gain, frequency, duty cycle, and temperature. Typical applications include motor control, light dimming, LCD bias control and level shifting. Its widespread use across the above fields means that it has a wide range of functions and applications.

The MCP4631-103E/ST has two basic operating modes: the write-cycle mode and the read/update mode. In write-cycle mode, the device will respond to sequential digital commands sent to its input pins. This allows the digital potentiometer to adjust the resistance between its two ends by changing the wiper voltage and/or the output voltage. In read/update mode, the device responds to single digital commands that read the wiper position and/or update the wiper position with new values.

The MCP4631-103E/ST is extremely simple to apply, as it requires no external components and has a simple SPI/QSPI interface. This easy-to-use digital potentiometer is exceptionally reliable, and provides extremely precise control over voltage or current. The power-saving 10-bit architecture and wide operating temperature range make it an ideal choice for precision control throughout a variety of data acquisition and motor applications.

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