These ICs, whose maximum accuracy is ±1°C for external and internal diode temperatures from -40°C to +65°C, provide a low-cost, highly flexible solution when accuracy is required at low temperatures.
Among the advanced features of the MCP990X family is remote temperature measurement via resistor error correction diode, which compensates for voltage drops and long board traces, enabling accurate readings at distances up to 50 cm from the IC. System noise input from components such as DC/DC converters and backlight inverters is minimized thanks to a sampling rate hopping filter that simplifies placement and routing. The combination of these features, along with two-, three-, or four-channel temperature monitoring options, offers numerous measurement opportunities for a complete system using a single IC.
Among the compact packages that take up less board space and enable smaller systems and improved product design in temperature-critical applications is a 2x2 mm package for the MCP9902 dual-channel temperature sensor. This IC is the smallest temperature sensor in Microchip's catalog and is 33% smaller than the company's previous generation dual-channel temperature sensor. A 3x3 mm package is also available for the MCP9903 (triple) and MCP9904 (quadruple) temperature sensors.
Microchip also introduced today the MCP9902 evaluation board (ADM00615) for development with the MCP9902 low-temperature sensor. This board is now available.
All three members of the MCP990X family are now available as samples and for volume production. The MCP9902 is supplied in an 8-pin, 2x2 mm WDFN package. The MCP9903 and MCP9904 are supplied in a 10-pin, 3x3 mm DFN package.
