Microchip Technology has introduced the MCP9604, a four-channel thermocouple conditioning integrated circuit (IC) designed to improve precision temperature measurement in production-line environments. The device targets industries such as chemical and food processing, manufacturing process control, medical equipment, HVAC systems, and other applications where accurate thermal monitoring is essential.
The MCP9604 is described as the first single-chip solution of its kind to provide up to ±1.5°C accuracy across four channels using I2C communication. This approach offers an alternative to traditional discrete or multichip thermocouple conditioning solutions that can add complexity and increase the risk of measurement errors.
“For more than two centuries, the thermocouple has been a critical tool for measuring extremely high temperatures, but the necessary precision and accuracy could not be achieved with the level of integration and cost-effectiveness that is required for today’s demanding production-line applications,” said Keith Pazul, vice president of Microchip’s mixed-signal linear business unit. “Our device now delivers a combination of precision, integration and cost-effectiveness, helping reduce the need for as many as 15 discrete components and associated system design challenges.”
The MCP9604 achieves its measurement accuracy by applying higher-order NIST ITS-90 equations rather than relying on single-order linear approximations used in analog amplifier designs. For example, it reaches ninth-order accuracy with K-type thermocouples within one chip that integrates all necessary components for signal processing and calculation.
By removing external components from the design, Microchip aims to simplify printed circuit board layouts and reduce both material costs and time spent on calibration processes typically required with discrete solutions.
The IC supports eight common thermocouple types—including J and K options—and operates over a temperature range from -200°C to +1372°C. It uses I2C communication for straightforward integration into digital systems such as microcontrollers.
Microchip notes that this new product builds on their earlier release of a single-channel thermocouple conditioning IC offering similar levels of accuracy. The company provides development support through its EV19L27A evaluation board, which allows users to connect up to four thermocouples for testing purposes. The evaluation board includes free downloadable software for data plotting.
The MCP9604 is available in tape-in-reel or rail configurations at $10.56 each in quantities of 10,000 units. The evaluation board is priced at $96.00 per unit and available immediately.
For further details or purchasing information, customers are directed to contact Microchip sales representatives or visit www.microchipdirect.com.
Microchip Technology Inc., headquartered in Chandler, Arizona, supplies products across industrial, automotive, consumer electronics, aerospace and defense sectors worldwide.
