SNAU250 November   2020 HDC2010 , HDC2021 , HDC2022 , HDC2080

 

  1.   1
  2.   2
    1.     3
    2.     4
      1.      5
      2.      6
      3.      7
  3.   8
    1.     9
    2.     10
      1.      11
      2.      12
  4.   13
    1.     14
    2.     15
      1.      16
      2.      17
      3.      18
    3.     19
      1.      20
      2.      21
      3.      22
      4.      23
    4.     24
    5.     25
  5.   26
  6.   27
    1.     28
    2.     29
    3.     30
    4.     31
    5.     32
    6.     33
    7.     34
  7.   35

4 Using the HDC20XX Heater

The HDC20XX includes an integrated heating element that can be switched on briefly to prevent or remove any condensation that may build up in high humidity environments. Additionally, the heater can be used to verify functionally of the integrated temperature sensor. The operating range of the heater should be limited to –40°C to 85°C. For 3.3-V operation, the heater will have a typical current draw of 90 mA, and 55 mA at 1.8-V operation.

The settling time and peak temperature attainable by using the integrated heater will be largely dependent on the board layout and the operating voltage of the device. Figure 4-1shows the heater response of the HDC2022EVM in the HDC2022EVM GUI. For reference, the HDC2022EVM settles around 105 °C within 2.5 minutes. Similar layout techniques such as cutouts and the use of small breakouts will provide the highest efficiency of heater operation.

GUID-20200826-CA0I-Q1NS-1NHZ-J8V2XLSNP4WF-low.svg Figure 4-1 HDC2022EVM heater response