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SI7020-A20-YM1R 数据表(PDF) 7 Page - Silicon Laboratories

部件名 SI7020-A20-YM1R
功能描述  IC HUMIDITY AND TEMPERATURE SENSOR
Download  36 Pages
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制造商  SILABS [Silicon Laboratories]
网页  http://www.silabs.com
标志 SILABS - Silicon Laboratories

SI7020-A20-YM1R 数据表(HTML) 7 Page - Silicon Laboratories

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Si7020-A20
Rev. 1.1
7
Table 4. Humidity Sensor
1.9 ≤ VDD ≤ 3.6 V; TA = 30 °C; default conversion time unless otherwise noted.
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Operating Range1
Non-condensing
0
100
%RH
Accuracy2, 3
0 – 80% RH
±3
±4
%RH
80 – 100% RH
See Figure 2.
Repeatability/Noise
12-bit resolution
0.025
%RH RMS
11-bit resolution
0.05
10-bit resolution
0.1
8-bit resolution
0.2
Response Time4
τ63%
1 m/s airflow, with cover
18
S
1 m/s airflow, without cover
17
Drift vs. Temperature
0.05
%RH/°C
Hysteresis
±1
%RH
Long Term Stability3
—< 0.25
%RH/yr
Notes:
1.
Recommended humidity operating range is 20% to 80% RH (non-condensing) over –10 °C to 60 °C. Prolonged
operation beyond these ranges may result in a shift of sensor reading, with slow recovery time.
2.
Excludes hysteresis, long term drift, and certain other factors and is applicable to non-condensing environments only.
See Section “4.1. Relative Humidity Sensor Accuracy” for more details.
3.
Drift due to aging effects at typical room conditions of 30 °C and 30% to 50% RH. May be impacted by dust, vaporized
solvents or other contaminants, e.g., out-gassing tapes, adhesives, packaging materials, etc. See Section “4.7. Long
Term Drift/Aging” .
4.
Response time to a step change in RH. Time for the RH output to change by 63% of the total RH change.


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