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HDC2080: Monitoring sample parameters coupled with other sensors

Part Number: HDC2080
Other Parts Discussed in Thread: TIDA-00554, , HDC1000

Hi everyone!

I am new to this world so excuse me for my, probably obvious, questions and for my bad English.
I would like to couple this sensor with a NIR spectrometer, such as the TIDA-00554, in order to associate a value of temperature and moisture to every NIR spectrum that I record.
My goal is not to monitor the temperature of the detector (which can be interesting too) but to record the temperature (and,x eventually, the moisture) of the sample.

Summarizing:

  1. Does this sensor fit my purposes?
  2. Any suggestion about how to embed it?
  3. I think I will need, at least, an IP64 case, both for my application and for the safety of the device, is it a problem?

Thanks to everyone who will answer my questions!
Bests,

Marcello

  • Dear Marcello -
    I think your command of the language is just fine. :)

    The sensor by itself should suit your purpose, however on its own, the sensor has no IP6x rating.
    You would want to make an enclosure for it which allows for that rating to be achieved. The device does have a heater which can be used to dissipate any water that gets splashed on it indirectly. This is discussed in the datasheet on pages 4, 9, and 25: www.ti.com/.../hdc2080.pdf

    Here is a guide for placement and routing on the PCB you will make, that will be enclosed:
    www.ti.com/.../snaa297a.pdf

    Lastly, here is a guide for storage and handling of the device: www.ti.com/.../snia025.pdf
  • Hi Josh!
    Thank you for your kind answer and for your consideration about my language ;)
    I need more help, the usage of the heater is interesting but let me understand more: this sensor (HDC2080) needs to come into contact with my sample or not?
    If a realize a case which is IP6x and if I use the heater as suggested by you, will I overcome the problem?

    About tue placement on the PCB, I am not familiar with this kind of procedure: is it a procedure that must be made by the manufacturer?

    Thanks.
    Bests,

    Marcello
  • Marcello -

    1. The sensor is meant to measure relative humidity (from the air) and should be protected from direct contact with water. 

    2. Yes, your PCB assembly house needs to follow the guidelines for handling the sensors when assembling the boards. 

  • Ok, and what about temperature?
    Does this component work the same way? I mean, it measures the environmental temperature and the one from the sample?
  • Marcello -
    in the reference design you are looking at, the HDC1000 was used, HDC2080 is a newer version of the family, it works very similarly to the older device, and also has an I2C interface to the microcontroller.

    see U6 in schematic
    www.ti.com/.../tidrfl9d
    2514147E_NIRSCANNANO TIVA BOARD.pdf (page 3)

    and board layout
    www.ti.com/.../tidrfm3
    2514148_NIRscan_TIVA_BOARD_ALL_LAYERS.pdf (primary side)