LIS2DW12 datasheet(14/66 Pages) STMICROELECTRONICS

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3.2

Functionality

3.2.1

Operating modes

Two sets of operating modes have been designed to offer the customer a broad choice of noise/power

consumption combinations:

•

Low-noise disabled (see Table 10. Operating modes - low-noise setting disabled)

•

Low-noise enabled (see Table 11. Operating modes - low-noise setting enabled)

Writing the LOW_NOISE bit in CTRL6 (25h) selects the operating mode (low-noise).

From each of these two sets, five operating modes have been designed:

•

1 High-Performance Mode: focus on low noise

•

4 Low-Power Modes: trade-off between noise and power consumption

These operating modes are selected by writing the MODE[1:0] and LP_MODE[1:0] bits in CTRL1 (20h).

Table 10. Operating modes - low-noise setting disabled

Parameter

High-Performance

Mode

Low-Power

Mode 4

Low-Power

Mode 3

Low-Power

Mode 2

Low-Power

Mode 1

Resolution [bit]

14-bit

12-bit

ODR [Hz]

12.5 - 1600

1.6 - 200

BW [Hz]

ODR/2 (N/A for

1600 Hz),

ODR/4, ODR/10,

ODR/20

180

ODR/4,

ODR/10,

ODR/20

360

ODR/4,

ODR/10,

ODR/20

720

ODR/4,

ODR/10,

ODR/20

3200

ODR/4,

ODR/10,

ODR/20

Noise density [µg/√Hz]

@ FS = ±2 g, ODR=200 Hz

110

160

210

300

550

Current consumption [µA]

@ Vdd=1.8 V

ODR=1.6 Hz

0.65

0.55

0.45

0.38

ODR=12.5 Hz

2.5

1.6

ODR=25 Hz

8.5

4.5

1.5

ODR=50 Hz

5.5

ODR=100 Hz

17.5

10.5

ODR=200 Hz

34.5

20.5

ODR=400, 800,

1600 Hz

LIS2DW12

Functionality

DS11811 - Rev 8

page 14/66

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