Si7023-A20

6

Rev. 1.1

Figure 2. RH Accuracy at 30 °C

Table 4. Humidity Sensor

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Operating Range1

Non-condensing

0

—

100

%RH

Accuracy2, 3

0 – 80% RH

—

±2

±3

%RH

80 – 100% RH

See Figure 2.

Repeatability/Noise

—

0.025

—

%RH RMS

Resolution

—

11

—

Bits

Response Time4

1 m/s airflow, with or without

cover

—6—

S

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.