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SPI interface characterizes digital potentiometers

Posted: 24 Oct 2007 ?? ?Print Version ?Bookmark and Share

Keywords:Microchip digital potentiometer? SPI interface?

Microchip Technology Inc. has introduced the MCP4141/2, MCP4241/2, MCP4161/2 and MCP4261/2 (MCP41XX/42XX) non-volatile digital potentiometers with SPI interface. The 7- and 8bit devices are specified over the extended industrial temperature range of -40 C to 125 C. They are available in several industry-standard packages, including the 3mm x 3mm DFN package.

Unlike mechanical potentiometers, the MCP41XX/42XX devices can be controlled digitally through an SPI interface. This is said to increase system accuracy, flexibility and manufacturing throughput, while decreasing manufacturing costs. Non-volatile memory enables the devices to retain their settings at power down, and their low static current consumption of 5 ?A (maximum) helps to extend battery life.

The MCP41XX/42XX digital potentiometers are suitable for a variety of consumer and industrial 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.

All in quantities of 10,000 for all package options, the MCP4141/2 (8pin SOIC, MSOP, PDIP and 3mm x 3mm DFN packages) is priced at $0.58 each; the MCP4241 (10pin 4mm x 4mm QFN package and 14pin SOIC, PDIP, TSSOP packages) is priced at $0.76 each; the MCP4242 (8pin 3mm x 3mm DFN package, 10pin MSOP package) is priced at $0.76 each; the MCP4161/2 (8pin 3mm x 3mm DFN, MSOP, PDIP and SOIC packages) is priced at $0.69 each, and the MCP4261/2 (8pin MSOP, PDIP, SOIC and 3mm x 3mm DFN packages) is priced at $0.87 each.

- Gina Roos

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