Automotive quad thermocouple interface IC

The MLX90342 is an innovative, high-performance quadruple thermocouple interface that provides rapid response and very high levels of accuracy when measuring extreme temperatures. It has been specifically designed to allow automotive designers to address the need for more stringent engine and exhaust thermal management and control.

Target applications include turbo charger temperature control, exhaust gas recirculation (EGR), selective catalytic reduction (SCR), diesel oxidation catalyst (DOC) and diesel/gasoline particle filtering systems.

The MLX90342 supports a -40°C to 1,300°C thermocouple temperature range and has an operating temperature specification spanning -40°C to 155°C. Sophisticated on-board cold junction compensation and linearization plus factory calibration, can attains the high accuracy of ±2.5°C for Ta>0degC. This effectively means the sensor is twice as accurate as other currently available devices.

The sensor interface is housed in a miniature, 26-pin 6x4 mm QFN package and has a rapid refresh rate up to 100Hz that aligns with manufacturer expectations for high-speed response.