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SI7020-A20 Scheda tecnica(PDF) 7 Page - Silicon Laboratories |
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SI7020-A20 Scheda tecnica(HTML) 7 Page - Silicon Laboratories |
7 / 36 page 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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