Automotive sensor signal conditioner for exhaust systems

June 27, 2019 //By Rich Pell
Automotive sensor signal conditioner for exhaust systems
Integrated Device Technology (San Jose, CA) has announced a dual thermocouple sensor signal conditioner for automotive exhaust system applications.

The ZSSC4175 sensor signal conditioner for dual thermocouples provides highly accurate amplification and sensor-specific correction of thermocouple signals to ensure very precise measurement of exhaust gas temperatures. Such data is used by engine management systems to reduce emissions and improve fuel economy.

"Our new ZSSC4175 sensor signal conditioner is an ideal solution for automakers who must simultaneously improve the fuel efficiency of their vehicles while reducing harmful exhaust emissions," says Tushar Duggal, director of marketing for automotive SSCs at IDT. "The extremely accurate measurements of exhaust temperatures produced by the ZSSC4175 will enable engine management systems to continually adjust operation to ensure compliance with increasingly stringent environmental regulations while maximizing fuel economy."

The ZSSC4175 is optimized for AEC-Q100 qualified automotive environments with overvoltage and reverse polarity protection circuitry, electromagnetic compatibility, multiple diagnostic features and a -40°C to 150°C operating range. It has dual inputs for thermocouple signals and uses a 16-bit RISC microcontroller to digitally compensate for offset, sensitivity, temperature drift and nonlinearity, and stores calibration coefficients and configuration data in an integrated non-volatile memory (NVM) IC that is reliable in automotive applications.

Key features include an internal cold junction temperature sensor that is pre-calibrated, which keeps assembly costs low as no trimming by external devices or lasers is needed. The device also features on-chip cold-junction compensation, which enables it to achieve best-in-class accuracy over a measurement range of -40°C to 125°C. It also offers N-type thermocouple calibration support by mathematical model.

For more, see the ZSSC4175 datasheet .

Integrated Device Technology


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