SI7022-A10 Datasheet, PDF (6/25 Pages) Silicon Laboratories – Optional factory-installed cover

Si7022-A10
Table 4. Humidity Sensor
1.9 ≤ V_DD ≤ 3.6 V; T_A = 30 °C
Parameter
Operating Range¹
Accuracy^{2, 3}
Symbol
Test Condition
Non-condensing
0 – 80% RH
80 – 100% RH
Min Typ Max
0
—
100
—
±3
±4
See Figure 2
Unit
%RH
%RH
Repeatability/Noise
— 0.025 — %RH RMS
Resolution
Response Time⁴
Drift vs. Temperature
Hysteresis
Long Term Stability³
τ_63%
—
11
—
1 m/s airflow, with or without cover —
6
—
— 0.05 —
—
±1
—
— < 0.25 —
Bits
S
%RH/°C
%RH
%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.
Figure 2. RH Accuracy at 30 °C
6
Rev. 1.1