Data Sheet

Bosch Sensortec | BME280 Data sheet
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Modifications reserved | Data subject to change without notice
Document number: BST-BME280-DS002-15
Revision_1.6_092018
1.2 Humidity parameter specification
Table 2: Humidity parameter specification
Parameter
Symbol
Condition
Min
Typ
Max
Unit
Operating range
1
R
H
For temperatures
< 0 °C and > 60 °C
see Figure 1
-40
25
85
°C
0
100
%RH
Supply current
I
DD,H
1 Hz forced mode,
humidity and
temperature
1.8
2.8
µA
Absolute accuracy
tolerance
A
H
20…80 %RH,
25 °C, including
hysteresis
±3
%RH
Hysteresis
2
H
H
109010 %RH,
25 °C
±1
%RH
Nonlinearity
3
NL
H
1090 %RH, 25 °C
1
%RH
Response time to
complete 63% of step
4


900 or 090 %RH,
25°C
1
s
Resolution
R
H
0.008
%RH
Noise in humidity (RMS)
N
H
Highest oversampling,
see chapter 3.6
0.02
%RH
Long term stability
H
stab
10…90 %RH, 25 °C
0.5
%RH/
year
1
When exceeding the operating range (e.g. for soldering), humidity sensing performance is temporarily degraded and
reconditioning is recommended as described in section 7.8. Operating range only for non-condensing environment.
2
For hysteresis measurement the sequence 103050709070503010 %RH is used. The hysteresis is defined as
the difference between measurements of the humidity up / down branch and the averaged curve of both branches
3
Non-linear contributions to the sensor data are corrected during the calculation of the relative humidity by the compensation
formulas described in section 4.2.3.
4
The air-flow in direction to the vent-hole of the device has to be dimensioned in a way that a sufficient air exchange inside to
outside will be possible. To observe effects on the response time-scale of the device an air-flow velocity of approx. 1 m/s is
needed.