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BMP280 Datasheet(PDF) 14 Page - Bosch Sensortec GmbH

Part # BMP280
Description  Digital Pressure Sensor
Download  49 Pages
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Manufacturer  BOSCH [Bosch Sensortec GmbH]
Direct Link  https://www.bosch-sensortec.com
Logo BOSCH - Bosch Sensortec GmbH

BMP280 Datasheet(HTML) 14 Page - Bosch Sensortec GmbH

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Datasheet
BMP280 Digital Pressure Sensor
Page 14
BST-BMP280-DS001-19 | Revision 1.19 | January 2018
Bosch Sensortec
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third
parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice. Not intended for publication.
Table 6: filter settings
Filter coefficient
Samples to reach ≥75 %
of step response
Filter off
1
2
2
4
5
8
11
16
22
In order to find a suitable setting for filter, please consult chapter 3.4.
When writing to the register filter, the filter is reset. The next value will pass through the filter and
be the initial memory value for the filter. If temperature or pressure measurement is skipped, the
corresponding filter memory will be kept unchanged even though the output registers are set to
0x80000. When the previously skipped measurement is re-enabled, the output will be filtered
using the filter memory from the last time when the measurement was not skipped.
3.4 Filter selection
In order to select optimal settings, the following use cases are suggested:
Table 7: Recommended filter settings based on use cases
Use case
Mode
Over-
sampling
setting
osrs_p
osrs_t
IIR
filter
coeff.
(see
3.3.3)
IDD
[µA]
(see
3.7)
ODR
[Hz]
(see
3.8.2)
RMS
Noise
[cm]
(see
3.5)
handheld device
low-power
(e.g. Android)
Normal
Ultra high
resolution
×16
×2
4
247
10.0
4.0
handheld device
dynamic
(e.g. Android)
Normal
Standard
resolution
×4
×1
16
577
83.3
2.4
Weather
monitoring
(lowest power)
Forced
Ultra low
power
×1
×1
Off
0.14
1/60
26.4
Elevator / floor
change detection
Normal
Standard
resolution
×4
×1
4
50.9
7.3
6.4
Drop detection
Normal
Low
power
×2
×1
Off
509
125
20.8
Indoor navigation
Normal
Ultra high
resolution
×16
×2
16
650
26.3
1.6


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