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Low-power volatile digipots include SPI interface

Posted: 20 Nov 2007 ?? ?Print Version ?Bookmark and Share

Keywords:digital potentiometer? SPI interface? consumer electronics?

Microchip Technology Inc. has released the MCP4131/2, MCP4231/2, MCP4151/2 and MCP4251/2 (MCP41/423X and MCP41/425X) volatile, 7- and 8bit digital potentiometers that have SPI interface.

The devices feature a low static current consumption of just 1?A, maximum and help extend battery life in a variety of consumer and industrial electronic applications such as power-supply trim and calibration; set-point and process control; closed-loop servo control; PC peripherals; portable instrumentation; instrumentation offset adjust and signal conditioning.

Unlike their mechanical counterparts, the volatile MCP41/423X and MCP41/425X potentiometers can be controlled digitally, through an SPI interface. This eliminates the need for human interface in order to adjust the wiper setting, which therefore increases system accuracy, flexibility and manufacturing throughput, while decreasing manufacturing costs.

"With MCP41/423X and MCP41/425X devices, Microchip has created another family of low-power digital potentiometers that complement industry trends toward higher-performing devices, in smaller sizes and at lower costs," said Bryan Liddiard, VP of marketing with Microchip's analog and interface products division.

John Austin, senior product marketing manager with Microchip's analog and interface products division, continued, "With extended temperature range operation and availability in several industry-standard packages, we expect the MCP41/423X and MCP41/425X to help designers meet and exceed demands for smaller, better and less-expensive designs."

Specified over extended temperature range of -40C to 125C, the MCP41/423X and MCP41/425X digital potentiometers are available in a variety of industry-standard packages, including the 3mm x 3mm DFN package. Prices range from 48 to 67 cents in 10,000-unit quantities.

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