AN2989

Operating modes

Doc ID 15761 Rev 1

13/28

Table 9 and Table 10 show the typical power consumption values for the different operating

modes.

Note:

Higher data rates correspond to lower device resolution.

3.1

Normal mode

In Normal mode data are generated at the data rate (ODR) selected through the DR bits and

for the axis enabled through the Zen, Yen and Xen bits of CTRL_REG1. Data generated for

a disabled axis is 00h.

Data interrupt generation is active and configured through INT1_CFG and INT2_CFG

registers.

3.2

Power-down mode

When the device is in power-down mode, almost all internal blocks of the device are

to allow communication with the device. Configuration register content is preserved and

output data registers are not updated, thus keeping in memory the last data sampled before

going to power-down mode.

Typical turn-on time to go back to Normal mode is 1 ms + 1/ODR.

Table 9.

ODR

50 Hz

100 Hz

400 Hz

Power consumption

250

255

290

Table 10.

Power consumption (µA)

0.5 Hz

1 Hz

2 Hz

5 Hz

10 Hz

50 Hz

10

20

30

60

99

100 Hz

10

15

20

40

80

400 Hz

10

15

20

40

80

Table 11.

Turn-on time

Data rate generation (Hz)

Turn-on time - typical (ms)

50

21

100

11

400

3.5