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2.1.2 Correlation between sensor capacity and period
•
Humidity Sensor HCT01 (approx.):
Period at RH_OUT:
•
Figure 3: The sensitivity is approx. 0,064 µs/% rH (with a rise of 0.25 pF/% rH)
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25
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19
0
Figure 4: Nominal characteristic of the measuring device with frequency output
Figure 5: Example of RH & T measuring device with HCT01 and frequency output
Rev. 0.2 / 09 /2015
70 pF @ 0 % rH - 95 pF @ 100 % rH
70 pF
95 pF 25.4 µs cycle duration
Nominal characteristic @5,0 V
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relative humidity [% rH]
19.0 µs cycle duration
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AN1111-2
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100
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