LSM303DLM Datasheet, PDF (15/38 Pages) STMicroelectronics – Sensor module:3-axis accelerometer and 3-axis magnetometer

LSM303DLM
6
Application hints
Application hints
Figure 4. LSM303DLM electrical connection - recommended for I²C fast mode
Electrical connection
Z
Vdd
1
Y
Vdd_IO
Vdd_IO
Rpu Rpu=10kOhm
X
DIRECTIONS OF
DETECTABLE
MAGNETIC FIELDS
Z
1
Y
X
DIRECTIONS OF
DETECTABLE
ACCELERATIONS
C3 = 10uF
C4 = 100uF
RES
GND
GND
SA0
NC
VDD
RES
28
1
7
8
22
21 NC
SCL_M
SDA_M
LSM303DLM
(TOP VIEW)
15
14
DRDY_M
RES
SET1
C1
C1=4.7uF
Vdd_IO
Rpu Rpu=10kOhm
C2=0.22uF
GND
AM09240V1
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.
Doc ID 018725 Rev 1
15/38