Remote diode measurement, high-precision low-temperature measurement in outdoor and industrial applications
MCP990X enables accurate readings even at a distance of up to 20 inches from the IC.

Microchip Technology (Korea Representative: Han Byeong-don) has launched the MCP990X System Management Bus (SMBus) temperature sensor IC family, capable of monitoring up to four channels in outdoor and industrial low-temperature measurement applications in cold environments, ranging from freezers and refrigerators to base stations and remote wireless devices.

This IC has a maximum accuracy of ±1°C for external and internal diode temperatures in the range of -40°C to +65°C, and provides a low-cost solution with excellent flexibility for low-temperature environments where high precision is required.

Advanced features of the MCP990X product family include a remote diode temperature measurement function with built-in resistance error correction to compensate for voltage drop caused by connectors and long board traces.

This enables accurate readings even at a distance of up to 20 inches from the IC. Additionally, a built-in sample frequency hopping filter minimizes system noise injected from components such as DC-DC converters or backlight inverters, making placement and routing easier. By combining these features with 2-channel, 3-channel, and 4-channel temperature monitoring options, the entire system can be measured over a wider range with a single IC.

Bryan J. Liddiard, Vice President of Marketing for Mixed-Signal and Linear Products at Microchip, stated, "Microchip is providing unique products in the industry by expanding its thermal management portfolio with a focus on lower-temperature remote and industrial applications. Additionally, these devices complement system designs for Microchip's extensive microcontroller product line, enabling accelerated development time to meet the sensing and process needs of end products."


This product offers an ultra-small package option, occupying less silicon space on the PCB. This allows for reduced system solution costs in temperature-critical applications and enables superior product design. The MCP9902 dual-channel temperature sensor has a footprint of only 2x2.

This IC is the smallest temperature sensor in Microchip's portfolio, being 33% smaller than Microchip's previous generation dual temperature sensor. Additionally, the MCP9903 triple and MCP9904 quad-channel temperature sensors are available in a 3x3 footprint package.