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LSM303DLH View Datasheet(PDF) - STMicroelectronics

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LSM303DLH
Application hints
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.
uct(s 6.2
Pull-up resistors
rod Pull-up resistors are placed on the two I2C bus lines.
Obsolete Product(s) - Obsolete P 6.3
Digital interface power supply
This digital interface dedicated to the linear acceleration signal is capable of operating with a
standard power supply (Vdd) or using a dedicated power supply (Vdd_IO_A).
This digital interface dedicated to the magnetic field signal requires a dedicated power
supply (Vdd_dig_M).
The table below shows the modes available in the various power supply conditions.
Table 8. Operational mode and power supply for magnetic field sensing
Vdd_dig_M Vdd
Mode
supported
Description
High
High
All
except off
Digital I/O pins: range from GND to Vdd_I2C_bus /
Vdd_dig_M.
Device fully functional. Digital logic blocks are powered
from Vdd_dig_M supply, including all onboard clocks.
Digital I/O pins: range from GND to Vdd_I2C_bus /
Vdd_dig_M.
High
Low
Power down Device measurement functionality not supported.
Device I2C bus and register access supported.
6.4
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/
Doc ID 16941 Rev 1
21/47
 

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