bmp280 datasheet

Bosch
Sensortec | BMP280 Data sheet
18 |
48
Modifications reserved | Data subject to change without notice
Document number: BST-BMP280-DS001-23 Revision_1.23_11202
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3.7 Current consumption
The current consumption depends on ODR and oversampling setting. The values given below are
normalized to an ODR of 1 Hz. The actual consumption at a given ODR can be calculated by
multiplying the consumption in Table 12 with the ODR used. The actual ODR is defined either by the
frequency at which the user sets forced measurements or by oversampling and t
standby
settings in
normal mode in Table 14.
Table 12: Current consumption
Oversampling setting
Pressure
oversampling
Temperature
oversampling
I
DD
[µA] @ 1 Hz forced mode
Typ Max
Ultra low power
×1
×1
2.74
4.16
Low power
×2
×1
4.17
6.27
Standard resolution
×4
×1
7.02
10.50
High resolution
×8
×1
12.7
18.95
Ultra high resolution ×16 ×2 24.8 36.85
3.8 Measurement timings
The rate at which measurements can be performed in forced mode depends on the oversampling
settings osrs_t and osrs_p. The rate at which they are performed in normal mode depends on the
oversampling setting settings osrs_t and osrs_p and the standby time t
standby
. In the following table the
resulting ODRs are given only for the suggested osrs combinations.
3.8.1 Measurement time
The following table explains the typical and maximum measurement time based on selected
oversampling setting. The minimum achievable frequency is determined by the maximum
measurement time.
Table 13: Measurement time
Oversampling
setting
Pressure
oversampling
Temperature
oversampling
Measurement
time [ms]
Measurement
rate [Hz]
Typ Max Typ Min
Ultra low power
×1
×1
5.5
6.4
181.8
155.6
Low power
×2
×1
7.5
8.7
133.3
114.6
Standard resolution
×4
×1
11.5
13.3
87.0
75.0
High resolution
×8
×1
19.5
22.5
51.3
44.4
Ultra high resolution
×16
×2
37.5
43.2
26.7
23.1