SI7013 Datasheet, PDF (7/43 Pages) Silicon Laboratories – I2C HUMIDITY AND TWO-ZONE TEMPERATURE SENSOR

Si7013
Table 4. Humidity Sensor
1.9 ≤ V_DD ≤ 3.6 V; T_A = 30 °C; default conversion time unless otherwise noted.
Parameter
Operating Range¹
Accuracy^{3, 4}
Repeatability-Noise
Symbol
Response Time⁵
Drift vs. Temperature
Hysteresis
Long Term Stability⁴
τ_63%
Test Condition
Non-condensing
0 – 80% RH
80 – 100% RH
12-bit resolution
11-bit resolution
10-bit resolution
8-bit resolution
1 m/s airflow
Min Typ Max
0
—
100
—
±2
±3
See Figure 2
— 0.025 —
— 0.05 —
—
0.1
—
—
0.2
—
—
18
—
— 0.05 —
—
±1
—
— < 0.25 —
Unit
%RH
%RH
%RH
%RH RMS
%RH RMS
%RH RMS
%RH RMS
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. See conversion time specifications in Table 2.
3. 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.
4. 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”
5. Response time to a step change in RH. Time for the RH output to change by 63% of the total RH change.
Rev. 0.95
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