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Temp sensor boasts accuracy, low power

Posted: 09 Oct 2009 ?? ?Print Version ?Bookmark and Share

Keywords:temperature sensor? automotive? interface?

MCP9804 temperature sensor

Microchip Technology Inc. is offering the MCP9804 temperature sensor that delivers accuracy of +0.25C (typical) and 1C from -40C to +125C. Static current consumption of the I?C device is at 200?A (typ.), enabling longer battery life for industrial, automotive and consumer applications. Available in small 8-pin MSOP and 2mm x 3mm DFN packages, the device also reduces board space.

Many temperature-sensing designs require the use of several external components, making them large, complex and expensive. Silicon-based temperature sensors are becoming more popular because they do not require external components and can be used with little to no design experience. In addition to low power and high accuracy, the MCP9804 sensor features programmable shutdown to extend battery life; an alert feature for over- and under-temperature window monitoring; and a critical temperature-alert feature that provides over-temperature protection, helping to further lengthen system life.

"The MCP9804 temperature sensor represents a significant expansion of Microchip's temperature-sensor family," said Bryan Liddiard, VP of marketing with Microchip's analog and interface products division. "The sensor gives designers a tremendous amount of flexibility to design smaller, higher-performing temperature sensing systems at lower costs."

Example applications for the MCP9804 temperature sensor include industrial freezers that require high accuracy at lower temperatures such as -20C to +45C; CE devices that require high accuracy at +85C, such as PCs; and automotive applications that demand high accuracy at temperatures up to +125C, such as engine temperature monitoring.

The MCP9804 temperature sensor is available in 8-pin MSOP or 2mm x 3mm DFN packages for $1.20 each in 10,000-unit quantities, for both package options.

For application notes on temperature sensors click here.

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