MCP4651-104E/ST

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Microchip\'s MCP4651-104E/ST is part of the Data Acquisition – Digital Potentiometers (DAP) range, and is a type of non-volatile memory that provides the users with the ability to trim the mechanical or digital performance of a device to their requirements. Typically, digital potentiometers are used when the system needs to be adjusted in order to suit different requirements across different operating levels, yet still function as designed.

The MCP4651-104E/ST provides an array of features to make adjustments easily both during the manufacturing and engineering processes, as well as providing flexible tuning during the user phase. The device employs Non Volatile Memory (NVM), allowing users to adjust their settings and then have them remain stored even when power is removed from the device. Memory retention is also excellent, with performance remaining consistent over at least 10 years.

The MCP4651-104E/ST provides 4 adjustable digital potentiometers, through the use of on-board E2 memory. This allows each of the digital potentiometers to be configured with an 8-bit resolution, and a total of 7 bytes of data can be stored in each potentiometer. In order to make full use of the memory, the device can be programmed through both an I2C and an SPI interface, allowing up to 20 devices to be connected using only two bidirectional lines.

The MCP4651-104E/ST also packs a voltage translator, allowing for the device to be operated at either a 1.7 V to 3.6 V or 1.9 V to 3.6 V supply. This provides flexibility, allowing the user to choose whatever supply voltage is most suitable for their device. The device also comes in the form of a standard 8-pin SOIC or an 8-pin DIP package.

The MCP4651-104E/ST provides a range of applications across many markets, including automotive, consumer electronics and industrial automation. The device is used to provide adjustable gain and impedance matching, allowing circuits to be adjusted and tuned to suit different requirements. Additionally, the device can be used as both a replacement for mechanical potentiometers, due to the non-volatile trimmable gain, as well as being utilised as a digital rheostat.

When applying the MCP4651-104E/ST, users will find the design process to be fairly straightforward. The device is powered using either a single supply voltage of 1.7 V to 3.6 V or 1.9 V to 3.6 V, and the SPI/I2C lines can use either a low voltage (3.3V) or high voltage (5V) configuration. The device layout is straightforward, allowing the user to easily adjust the three-terminal resistance with an external voltage or current.

The internal non-volatile memory is powered by a state-of-the-art proprietary technology that stores both the trim value and other data values within the device. This data can then be read and written to the device through the I2C or SPI interface. This data is kept safe and secure, and can be automatically retrieved each time the device is powered up.

The MCP4651-104E/ST is a versatile device that provides a range of features to allow for precise tuning and adjustment of systems. By utilizing non-volatile memory and allowing for low voltage supply, the device provides users with a reliable and adaptable solution for many applications. The simple layout and adjustable resistance also reduce the amount of time needed to incorporate the device into a circuit, simplifying the design process.

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