LSM303DLMTR datasheet(15/38 Pages) STMICROELECTRONICS

15 / 38 page

LSM303DLM

Application hints

Doc ID 018725 Rev 1

15/38

Application hints

Figure 4.

LSM303DLM electrical connection - recommended for I2C fast mode

6.1

External capacitors

The C1 and C2 external capacitors should have a low SR value ceramic type construction.

Reservoir capacitor C1 is nominally 4.7 µF in capacitance, with the set/reset capacitor C2

nominally 0.22 µF in capacitance.

The device core is supplied through the Vdd line. Power supply decoupling capacitors

(C4=100

nF ceramic, C3=10 µF Al) should be placed as near as possible to the supply pin

of the device (common design practice). All the voltage and ground supplies must be

present at the same time to obtain proper behavior of the IC (refer to

Figure 4).

The functionality of the device and the measured acceleration/magnetic field data is

selectable and accessible through the I2C interface.

The functions, the threshold, and the timing of the two interrupt pins (INT 1 and INT 2) can

be completely programmed by the user through the I2C interface.

DIRECTIONS OF

DETECTABLE

MAGNETIC FIELDS

DIRECTIONS OF

DETECTABLE

ACCELERATIONS

RES

GND

(TOP VIEW)

VDD

SDA_M

SCL_M

SET1

RES

DRDY_M

LSM303DLM

SA0

C2=0.22uF

GND

C1=4.7uF

Vdd_IO

Vdd

C4 = 100uF

C3 = 10uF

GND

Vdd_IO

Rpu

Electrical connection

Rpu=10kOhm

Vdd_IO

Rpu

Rpu=10kOhm

AM09240V1

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