H3LIS331DL Datasheet, PDF (16/38 Pages) STMicroelectronics – MEMS motion sensor: low-power high-g 3-axis digital accelerometer

Application hints
4
Application hints
Figure 5. H3LIS331DL electrical connections
Vdd
H3LIS331DL
10µF
Vdd_IO
100nF
16
1
14
13
TOP VIEW
5
6
9
8
INT 1
INT 2
GND
Digital signal from/to signal controller. Signal levels are defined by proper selection of Vdd_IO
AM12626V1
The device core is supplied through the Vdd line while the I/O pads are supplied through the
Vdd_IO line. Power supply decoupling capacitors (100 nF ceramic, 10 μF aluminum) should
be placed as near as possible to pin 14 of the device (common design practice).
All the voltage and ground supplies must be present at the same time to have proper
behavior of the IC (refer to Figure 5). It is possible to remove Vdd maintaining Vdd_IO
without blocking the communication bus, in this condition the measurement chain is
powered off.
The functionality of the device and the measured acceleration data are selectable and
accessible through the I²C or SPI interfaces. When using the I²C, CS must be tied high.
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/SPI interface.
4.1
Soldering information
The LGA package is compliant with the ECOPACK^®, RoHS and “Green” standards.
It is qualified for soldering heat resistance according to JEDEC J-STD-020C.
Leave “pin 1 indicator” unconnected during soldering.
Land pattern and soldering recommendations are available at www.st.com.
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DocID023111 Rev 2