High-accuracy, low-power temperature sensor
05 October 2009
The MCP9804 temperature sensor from Microchip is available in 8pin MSOP and 2mm x 3mm DFN packages.
The sensor provides high temperature accuracy of +0.25°C (typical) and +/- 1°C from -40°C to +125°C, as well as static current consumption of just 200µA (typ). Available in small 8pin MSOP and 2mm x 3mm DFN packages, the I2C device reduces board space and enables longer battery life for industrial, automotive and consumer applications.
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.
Example applications for the MCP9804 temperature sensor include industrial freezers that require high accuracy at lower temperatures such as -20°C to +45°C; consumer electronic devices that require high accuracy at +85°C, such as personal computers; and automotive applications that demand high accuracy at temperatures up to +125°C, such as engine temperature monitoring.
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