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Document number: BST-BMEP388-DS001-01 Revision_1.1_032018

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 20 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 23.

Table 20: 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 21: measurement time

Oversampling

setting

Pressure

oversampl

ing

Tempera

ture

oversam

pling

Measurement

time [ms]

Measurement

rate [Hz]

Typ

Max

calculate

d min

time in

forced

mode

Typ

Min

calculate

d max

rate in

forced

mode

Ultra low power

×1

5.5

5.7

4.9

181.8

155.6

202

Low power

×2

×1

7.5

8.7

6.9

133.3

114.6

144.1

Standard resolution

×4

×1

11.5

13.3

10.9

87.0

75.0

91.4

High resolution

×8

×1

19.5

22.5

18.9

51.3

44.4

52.8

Ultra high resolution

×16

×2

37.5

43.2

36.9

26.7

23.1

27.1

highest resolution

×32

×2

68.9

14.5

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