Features
 3 magnetic field channels and 3 acceleration
channels
 ±50 gauss magnetic dynamic range
 ±2/±4/±8/16 g selectable acceleration full
scales
 Anti-aliasing filter
 16-bit data output
 SPI / I2C serial interfaces
 Analog supply voltage 1.71 V to 1.98 V
 Programmable interrupt generators for freefall,
motion and magnetic field detection
 Embedded self-test
 Embedded 256-level FIFO
 Embedded temperature sensor
 Embedded digital functions: step detector, step
counter, significant motion and tilt
 ECOPACK®, RoHS and “Green” compliant

Description
The LSM303AH is an ultra-low-power highperformance
system-in-package featuring a 3D
digital linear acceleration sensor and a 3D digital
magnetic sensor.
The LSM303AH has user-selectable linear
acceleration full scales of ±2g/±4g/±8g/16 g and
is capable of measuring accelerations with output
data rates from 1 Hz to 6400 Hz. The device has
a magnetic field dynamic range of ±50 gauss with
output data rates from10 Hz to 100 Hz. The
LSM303AH includes an I2C serial bus interface
that supports standard, fast mode, fast mode
plus, and high-speed (100 kHz, 400 kHz, 1 MHz,
and 3.4 MHz) and an SPI serial standard
interface.
The LSM303AH has an integrated 256-level firstin,
first-out (FIFO) buffer allowing the user to store
data in order to limit intervention by the host
processor. The FIFO buffer applies only to the
accelerometer.
The embedded self-test capability allows the user
to check the functioning of the sensor in the final
application.
The system can be configured to generate an
interrupt signal for free-fall, motion detection and
magnetic field detection. The magnetic and
accelerometer blocks can be enabled or put into
power-down mode separately.
The LSM303AH is available in a plastic land grid
array package (LGA) and is guaranteed to
operate over an extended temperature range
from -40 °C to +85 °C.

Applications
 Tilt-compensated compasses
 Map rotation
 Position and free-fall detection
 Motion-activated functions
 Click/double-click recognition
 Pedometers
 Intelligent power saving for handheld devices
 Display orientation
 Gaming and virtual reality input devices
 Impact recognition and logging
 Vibration monitoring and compensation