AN3393 datasheet(12/103 Pages) STMICROELECTRONICS

tên linh kiện	AN3393

Giải thích chi tiết về linh kiện	This document is intended to provide information

PDF	103 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

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Operating modes

AN3393

12/103

DocID018750 Rev 4

1.1

Power-down mode

When the device is in power-down mode, almost all internal blocks are switched off to

minimize power consumption. Digital interfaces (I2C and SPI) are still active to allow

communication with the device. The content of the configuration registers is preserved and

output data registers are not updated, therefore keeping the last data sampled in the

memory before switching to power-down mode.

1.2

Normal mode

In normal mode, data are generated at the selected output data rate (ODR) through the

ODR bits. Nine different ODR configurations are available in normal mode, from 3.125 Hz to

1600 Hz.

1.3

Switch mode timing

Turn-on times of the LIS3DSH accelerometer are shown in Table 3. Their values depend on

the ODR and bandwidth selected.

Table 3. Turn-on times

ODR [Hz]

Analog filter

BW = 800 Hz

Analog filter

BW = 400 Hz

Analog filter

BW = 200 Hz

Analog filter

BW = 50 Hz

1600

3/ODR

4/ODR

8/ODR

26/ODR

800

2/ODR

3/ODR

5/ODR

14/ODR

400

2/ODR

3/ODR

8/ODR

100

2/ODR

3/ODR

[50 ... 3.125]

1/ODR

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