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5

Table 4. Humidity Sensor

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Non-condensing

0

—

100

%RH

0 – 80% RH

—

±4

±5

%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

—

1 m/s airflow

—

18

—

S

Drift vs. Temperature

—

0.05

—

%RH/°C

Hysteresis

—

±1

—

%RH

—

< 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.