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HDC2080: calibration and polynomials

Slava Prokopii
Intellectual 2065 points
Part Number: HDC2080


Hello, we are going to use a humidity sensor in our project.

Now we are considering devices from TI and Renesas.

We have several questions about HDC2080:
1) are the temp and humidity polynomials coefficients available for readings?
2) is the FLASH-memory of device available for writing other coefficients to be used in polynomials by calibration process?
3) can we get a polynomials, that are used fore temperature and humidity calculation?
4) what is the conversion core is used in this device: is this TI owned or from a third party?

  • 0
    TI__Guru* 91086 points

    Dear Slava - 

    1. No, the digital outputs from registers 0x00 to 0x03 (where 0x01, 0x00 are temp and 0x03, 0x02 are %RH) is what is provided from the part, on the I2C bus, when requested by the controller (MCU or MPU), after a conversion cycle is complete. 

    2. No, there is no flash memory in the part, only RAM based registers for setting configuration, thresholds and offsets

    3. the formulas for calculation of the temp and %RH are located in the datasheet (page 18) https://www.ti.com/lit/ds/symlink/hdc2080.pdf, temp formula (for HDC2080) does need to be updated to end with a -40.62 instead of -40. 

    4. TI owned.