ILPS22QSTR datasheet(37/57 Pages) STMICROELECTRONICS

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The following table summarizes the current consumption of all the ASIC resolution modes.

Table 22. Power consumption for pressure acquisition

AVG

One-shot mode

Continuous mode – current consumption (μA) vs. ODR

Current consumption (μA)

@ 1 Hz

ODR max

1 Hz

4 Hz

10 Hz

25 Hz

50 Hz

75 Hz

100 Hz

200 Hz

512

31.1

32.8

126.8

314.4

783.8

128

9.2

35.6

86.7

214.3

427

639.8

5.5

100

6.3

20.4

48.7

119.4

237.2

355

472.8

3.6

200

4.4

12.8

29.8

71.9

142.2

212.6

282.9

564.4

2.7

300

3.5

20.2

48.2

94.8

141.4

188

374

400

2.7

12.6

29.1

56.5

84.2

111.5

221.7

1.8

500

2.5

10.2

23.2

44.7

66.2

87.8

174

Table 23. Power consumption for Qvar acquisition

AVG

One-shot mode

Continuous mode – current consumption (μA) vs. ODR

Current consumption (μA)

@ 1 Hz

ODR max

1 Hz

4 Hz

10 Hz

25 Hz

50 Hz

75 Hz

100 Hz

200 Hz

512

21.9

22.6

76.4

184.5

458.6

128

8.6

9.3

24.1

53.9

128.4

253.4

379

6.5

100

7.2

15.4

32.1

73.6

143.2

213.1

283.1

5.4

200

6.1

11.1

21.3

46.5

88.6

131

173.4

343.4

4.8

300

5.5

8.9

15.7

32.8

61.4

118.7

233.4

4.3

400

6.9

10.7

35.8

51.4

67.1

130.2

4.2

500

4.9

6.4

9.3

16.6

28.9

41.2

53.5

102.7

The noise performance of pressure in ILPS22QS is also defined as depending on the ODR and selected

resolution and its performance is a trade-off between the power consumption and resolution. The noise

performance is indicated in the following table.

Table 24. Noise performance of pressure

AVG

FS = 1260 hPa

FS = 4060 hPa

Pressure noise (Parms)

ODR/2(1)

ODR/4

ODR/9

ODR/2(1)

ODR/4

ODR/9

512

0.59

0.44

0.34

1.16

0.85

0.64

128

0.9

0.67

0.48

2.15

1.48

1.11

1.20

0.86

0.64

2.98

2.05

1.55

1.64

1.16

0.87

4.14

2.89

2.10

2.30

1.63

1.18

5.86

4.11

2.97

3.12

2.18

1.60

8.11

5.73

4.23

4.26

2.87

2.20

11.3

7.82

5.81

1. LPF1 filter is disabled.

ILPS22QS

CTRL_REG1 (10h)

DS13431 - Rev 3

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