LIS2DHTR datasheet(20/50 Pages) STMICROELECTRONICS

20 / 50 page

Application hints

LIS2DH

20/49

Doc ID 022516 Rev 1

Application hints

Figure 5.

LIS2DH electrical connection

The device core is supplied through Vdd line while the I/O pads are supplied through

Vdd_IO line. Power supply decoupling capacitors (100 nF ceramic, 10 µF aluminum) should

be placed as near as possible to the pin 8 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 is 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 (INT1 and INT2) can be

completely programmed by the user through the I2C/SPI interface.

3.1

Soldering information

The LGA package is compliant with the ECOPACK®, RoHS and “Green” standard.

It is qualified for soldering heat resistance according to JEDEC J-STD-020.

Leave “Pin 1 Indicator” unconnected during soldering.

Land pattern and soldering recommendations are available at www.st.com.

Vdd_IO

Digital signal from/to signal controller.Signal’s levels are defined by proper selection of Vdd_IO

SCL/SPC

SDA/SDI/SDO

SDO/SA0

GND

Vdd

Pin 1 indicator

GND

10µF

Vdd

100nF

GND

AM10220V1

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