SI7005-B-GM1 View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

MFG CO.

SI7005-B-GM1

DIGITAL I2C HUMIDITY AND TEMPERATURE SENSOR

Silicon Laboratories 

Si7005

The RH accuracy is defined as the center (dashed) line shown in Figure 7, which is the average of the two data

points at each relative humidity set-point. In this case, the sensor shows an accuracy of 0.25%RH. The Si7005

accuracy specification (Table 4) includes:

Unit-to-unit and lot-to-lot variation in non-linearity compensation

Accuracy of factory calibration

Margin for shifts that can occur during solder reflow (compensation for shift due to reflow is included in the

linearization procedure below).

The accuracy specification does not include:

Hysteresis (typically ±1%)

Effects from long term exposure to very humid conditions

Contamination of the sensor by particulates, chemicals, etc.

Other aging related shifts (“Long-term stability”)

Variations due to temperature (a temperature compensation method is described in section “4.4.

Temperature Compensation”). After application of temperature compensation, RH readings will typically

vary by less than ±0.05%/°C.

14

Rev. 1.3

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