A − 40 to 250 °C Triple Modular Redundancy Temperature Sensor for Turbofan Engines

Pietro Maris Ferreira (1) , Martin Schaeffer (1) , Adel Mezaour (1) , Olivier Petit (1) , Caroline Lelandais-Perrault (1) , Gérad Charbonnier (2)

1 GeePs - Laboratoire Génie électrique et électronique de Paris
2 SAFRAN [Paris]

Turbofan engines using distributed control architecture require sensors and electronic instrumentation located in the engine compartment to simplify system design, improve reliability, and ease signal multiplexing. Designing a wide range temperature sensor which works reliably regardless of process variation can be extremely challenging. Using a bandgap-like topology with PiN diodes as the sensing element, this work proposes a -40 to 250 °C temperature sensor in the IMS 0.35 μm SOI technology. To circumvent the process variation challenge, a triple modular redundancy is proposed for the sensing element combined with a weighted voter and digital circuitry calibration. The proposed sensing element supplies the analog-to-digital conversion (ADC) with a V REF having a typical-mean temperature coefficient of 62 ppm/°C, 24 ppm/°C for the best corner, and 213 ppm/°C for the worst corner. An average VCTAT sensitivity is estimated at 0.282 mV/°C among all corners. After a 2-point temperature calibration, the ADC quantization step presented a negligible variation over temperature, approximately 1.0 mV among all corners, assuring a 0.28 °C of temperature inaccuracy.

Domaines: Micro et nanotechnologies/Microélectronique; Electronique

Pietro Maris Ferreira, Martin Schaeffer, Adel Mezaour, Olivier Petit, Caroline Lelandais-Perrault, et al.. A − 40 to 250 °C Triple Modular Redundancy Temperature Sensor for Turbofan Engines. 31st SBC/SBMicro/IEEE/ACM Symposium on Integrated Circuits and Systems Design (SBCCI), Aug 2018, Bento Gonçalves, Brazil. ⟨10.1109/sbcci.2018.8533226⟩. ⟨hal-01868264⟩