Microchip Technology's MCP9800 / 1 / 2 / 3 family of digital temperature sensors converts temperatures between -55°C and +125°C to a digital word. They provide an accuracy of ±1°C (maximum) from -10°C to +85°C.

The MCP9800 / 1 / 2 / 3 family offers user-programmable registers to provide flexibility for temperature-sensing applications. The register settings allow user-selectable, 9-bit to 12-bit temperature-measurement resolution, configuration of the power-saving shutdown and one-shot (single conversion on command while in shutdown) modes, and the specification of both temperature-alert output and hysteresis limits. When the temperature changes beyond the specified limits, the MCP9800 / 1 / 2 / 3 outputs an alert signal. The user has the option of setting the alert output signal polarity as an active-low or -high comparator output for thermostat operation, or as temperature-event interrupt output for microprocessor-based systems.

This sensor has an industry standard 2-wire, I²C / SMBus compatible serial interface, allowing up to eight devices to be controlled in a single serial bus. These features make the MCP9800 / 1 / 2 / 3 ideal for sophisticated multi-zone temperature-monitoring applications.