Data Sheet
Bosch Sensortec | BME280 Data sheet
52 | 55
Modifications reserved | Data subject to change without notice
Document number: BST-BME280-DS002-15
Revision_1.6_092018
9.4 Response time using IIR filter
When using the IIR filter, the response time of the sensor depends on the selected filter coefficient and
the data rate used. It can be calculated using the following formula:
For the example above with a data rate of 13.51 Hz, the user could select a filter coefficient of 8.
According to Table 6, the number of samples needed to reach 75% of a step response using this filter
setting is 11. The response time with filter is therefore:
9.5 Current consumption
The current consumption depends on the selected oversampling settings, the measurement rate and
the sensor mode, but not on the IIR filter setting. It can be calculated as:
⋅
⋅
Note that the only difference between forced and normal mode current consumption is that the current
for the inactive time is either I
DDSL
or I
DDSB
. For the example above, the current would be
⋅