BMP384 datasheet(25/58 Pages) BOSCH

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Bosch Sensortec | BMP384 Datasheet

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Modifications reserved |Data subject not change without notice | Printed in Germany

Document number: BST-BMP384-DS003-11 Revision_1.0_112020

3.8.

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 21 with the ODR

used. The actual ODR is defined either by the frequency at which the user sets forced measurements or by oversampling

and sampling period settings in normal mode in Table 24.

Table 21: Current consumption

Oversampling setting

Pressure

oversampling

Temperature

oversampling

IDD [µA] @ 1 Hz forced

mode

Typ

Calculated

Forced

Mode

Max

Ultra low power

×1

3.4

4.3

7.4

Low power

×2

×1

4.8

5.6

9.3

Standard resolution

×4

×1

7.8

8.2

12.8

High resolution

×8

×1

13.8

13.3

19.5

Ultra high resolution

×16

×2

26.2

24.3

33.5

highest resolution

×32

×2

46.4

45.0

59.2

3.9.

Measurement timings

The rate at which measurements can be performed in forced mode depends on the oversampling settings osr_t and osr_p.

Thus in normal mode, the measurement rate is determined by the sampling frequency fsample.

3.9.1. 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 22: measurement time

Oversampling

setting

Pressure

oversampling

Temperature

oversampling

Measurement

time[ms]

Measurement rate

[Hz]

Typ

Max

Typ

Min

Ultra low power

×1

4.82

5.70

207.08

175.39

Low power

×2

×1

6.84

7.96

146.00

125.56

Standard resolution

×4

×1

10.88

12.48

91.83

80.07

High resolution

×8

×1

18.69

21.53

52.71

46.42

Ultra high resolution

×16

×2

37.14

41.89

26.91

23.86

highest resolution

×32

×2

69.46

78.09

14.39

12.80

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