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HDC2080: HDC2080 compatible with HDC1080

Irene Qin
Intellectual 2790 points
Part Number: HDC2080
Other Parts Discussed in Thread: HDC1080

Tool/software:

Hi team

Due to some quality issue of HDC2080, customer will has supply shortage with HDC2080.

Looks like HDC2080 could SW and HW compatible with HDC2021DEBR HDC2022DEPR, but the supply of these two device also not good.

Could you please check whether HDC1080 could SW and HW with HDC2080, if not , how could these two device compatible by changing the SW pr HW?

Thanks

irene

  • +1
    TI__Genius 10445 points

    Irene,

    The HDC1080 is HW compatible with the HDC2080. The ADDR and DRDY/INT pins of the HDC2080 are just no connect pins on HDC1080. But VDD/SCL/SDA/GND are in the same position and the packages are the same.

    They do have different SW, so some small changes will be required. Both parts utilize traditional I2C with register maps, but have different register maps. In short, to read RH and Temp from HDC1080 must perform the following sequence:

    • Write 0x10 to the configuration register 0x02 (reads both temp and humidity)
    • Read 4 bytes in sequence from registers 0x00 and 0x01 (temp and humidity results respectively, don't do reads as two separate transactions).

    The HDC2080 has an automatic measurement mode as well as a different one-shot sequence and more register features built around the DRDY/INT pin.

    Both parts use the same address, 0x40.

    Please let me know what additional questions you have.

    Thanks

    -Alex Thompson