AEC-Q100 Grade qualification and the underhood temperature envelope
The Texas Instruments HDC3020DEFR is an Automotive grade digital humidity and temperature sensor carrying AEC-Q100 qualification, the automotive IC reliability and PPAP standard. The 0.5% RH accuracy and 16-bit output over I²C mean the sensor delivers a calibrated digital word directly to the ECU microcontroller — no external ADC or linearization lookup table needed. The 4 ms response time supports fast cabin-climate feedback loops where the HVAC controller updates every tens of milliseconds.
Supply voltage and interface compatibility
The sensor operates from a 1.62 V supply, which lets it run on the same 1.8 V rail as the rest of the automotive sensor cluster without a separate LDO. The I²C interface is the standard two-wire bus found on every automotive-grade MCU — no special timing controller or level shifter required on the PCB.