LSM303AGRTR - 3D Accelerometer & Magnetometer | STMicroelectronics
MPN: LSM303AGRTR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.5 | $2.50 |
| 10 | $2.25 | $22.50 |
| 100 | $2 | $200.00 |
| 500 | $1.8 | $900.00 |
| 1,000 | $1.6 | $1,600.00 |
Drop-in alternatives for LSM303AGRTR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LSM303AGR
✅ Drop-In📋 Reference alternative (not in catalog)
LIS2DH12TR
⚡ Same Package✓ 99,999 In Stock
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View Datasheet →LIS3MDL
⚡ Same Package📋 Reference alternative (not in catalog)
LSM303AGRTR Maximum Ratings & Electrical Characteristics
| Accelerometer Range | ±2g, ±4g, ±8g, ±16g |
| Magnetometer Range | ±50 gauss |
| Accelerometer Resolution | 16-bit |
| Magnetometer Resolution | 16-bit |
| Supply Voltage | 1.71 V to 3.6 V |
| Interface | I2C, SPI |
| I2C Address (Accelerometer) | 0x19 |
| I2C Address (Magnetometer) | 0x1E |
| Current Consumption (Normal Mode) | 180 µA |
| Current Consumption (Power-Down) | 2 µA |
| Operating Temperature | -40°C to +85°C |
| Package | LGA-12 (2x2x1 mm) |
| Mounting Type | Surface Mount |
| FIFO Buffer | Yes |
| Self-Test | Yes |
| RoHS Status | Compliant |
LSM303AGRTR Pin Configuration
| Pin 1 | VDD — Power supply (1.71V to 3.6V) |
| Pin 2 | GND — Ground |
| Pin 3 | SCL — I2C clock line |
| Pin 4 | SDA — I2C data line |
| Pin 5 | SDO/SA0 — SPI serial data output / I2C address select |
| Pin 6 | CS — Chip select (active low) |
| Pin 7 | INT1 — Interrupt 1 output |
| Pin 8 | INT2 — Interrupt 2 output |
| Pin 9 | VDD_IO — I/O supply voltage |
| Pin 10 | NC — Not connected |
| Pin 11 | NC — Not connected |
| Pin 12 | NC — Not connected |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LSM303AGRTR is suitable for 6 applications: Wearable Devices, IoT Motion Sensing, Mobile Devices, Robotics and Drones, Industrial Vibration Monitoring, Compass and Navigation.
Wearable Devices
The LSM303AGRTR is ideal for wearable devices such as fitness trackers and smartwatches. Its ultra-low power consumption (180 µA in normal mode) extends battery life, while the 16-bit accelerometer and magnetometer enable accurate step counting, activity recognition, and orientation detection. The compact LGA-12 package (2x2x1 mm) fits easily into small form factors. In a typical fitness tracker, the sensor is placed near the wrist to detect arm movements. The accelerometer data is processed by a microcontroller to count steps, while the magnetometer provides heading information for navigation. The FIFO buffer reduces host processor load by storing data during periods of inactivity, allowing the processor to sleep and save power. The device's wide supply voltage range (1.71V to 3.6V) allows direct connection to a coin cell battery or a regulated 1.8V rail. The interrupt pins can be configured to wake the system on motion, enabling always-on sensing with minimal power draw.
Recommended
IoT Motion Sensing
In IoT applications, the LSM303AGRTR provides motion and orientation sensing for smart home devices, asset tracking, and environmental monitoring. Its low power consumption and small size make it suitable for battery-powered sensors that need to operate for years. The I2C and SPI interfaces allow easy integration with a wide range of microcontrollers and wireless modules. For example, in a smart thermostat, the sensor can detect when a person enters the room and trigger the heating or cooling system. The accelerometer can detect vibration or tilt in industrial equipment, providing predictive maintenance alerts. The magnetometer can be used for door/window sensors to detect magnetic field changes. The device's self-test feature allows for functional verification during production, ensuring reliability. The wide operating temperature range (-40°C to +85°C) enables deployment in outdoor and industrial environments.
Recommended
Mobile Devices
The LSM303AGRTR is used in smartphones and tablets for screen rotation, gaming, and augmented reality applications. The accelerometer detects device orientation and movement, while the magnetometer provides compass heading. The combination enables accurate tilt-compensated compass functionality, which is essential for navigation apps. The sensor's high resolution (16-bit) ensures smooth and responsive user interfaces. In a smartphone, the sensor is typically mounted on the main PCB near the center of the device. The I2C interface connects to the application processor, and the interrupt pins can be used to wake the device from sleep when motion is detected. The low power consumption is critical for battery life, especially in always-on sensing modes. The device's small package allows for flexible PCB placement, even in thin and light designs.
Recommended
Robotics and Drones
In robotics and drones, the LSM303AGRTR provides orientation and heading information for stabilization and navigation. The accelerometer measures linear acceleration, while the magnetometer provides heading reference. The sensor's wide measurement ranges (±16g for accelerometer, ±50 gauss for magnetometer) can handle the dynamic movements of drones and robots. The SPI interface allows high-speed data transfer, which is essential for real-time control loops. In a quadcopter, the sensor is used in the inertial measurement unit (IMU) to estimate attitude. The data is fused with gyroscope data (if available) to provide accurate orientation. The sensor's low power consumption is beneficial for battery-powered drones, extending flight time. The compact package allows for integration into small flight controllers.
Recommended
Industrial Vibration Monitoring
The LSM303AGRTR is used in industrial equipment for vibration monitoring and predictive maintenance. The accelerometer can detect abnormal vibrations in motors, pumps, and other machinery, allowing early detection of faults. The wide measurement range (±16g) can capture high-amplitude vibrations, while the high resolution (16-bit) ensures accurate measurement of small vibrations. The device's industrial temperature range (-40°C to +85°C) makes it suitable for harsh environments. In a typical setup, the sensor is mounted on the equipment housing, and the data is transmitted to a central monitoring system via a wired or wireless connection. The FIFO buffer can store data during high-frequency sampling, reducing the load on the host processor. The self-test feature allows for periodic verification of sensor functionality, ensuring reliable operation.
Recommended
Compass and Navigation
The LSM303AGRTR's magnetometer enables accurate compass heading, which is essential for navigation applications in vehicles, drones, and handheld devices. The accelerometer provides tilt compensation, ensuring accurate heading even when the device is not level. The combination of accelerometer and magnetometer allows for a full 3D orientation solution. In a car navigation system, the sensor can be used for dead reckoning when GPS signals are unavailable. The magnetometer's range of ±50 gauss is sufficient for measuring the Earth's magnetic field (0.25-0.65 gauss) and for detecting magnetic anomalies. The sensor's low power consumption is important for battery-powered navigation devices. The I2C and SPI interfaces allow easy integration with microcontrollers and GPS modules.
Recommended
Recommended Products Summary
Engineering reference data for LSM303AGRTR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LSM303AGR | LSM303DLHC | LIS2DH12 | LIS3MDL |
|---|---|---|---|---|---|
| Package | LGA-12 (2x2x1 mm) | LGA-12 (2x2x1 mm) - same | LGA-28 (5x5x1 mm) | LGA-12 (2x2x1 mm) - same | LGA-12 (2x2x1 mm) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Accelerometer Range | ±2g, ±4g, ±8g, ±16g | ±2g, ±4g, ±8g, ±16g | ±2g, ±4g, ±8g, ±16g | ±2g, ±4g, ±8g, ±16g | N/A (magnetometer only) |
| Magnetometer Range | ±50 gauss | ±50 gauss | ±8.1 gauss | N/A (accelerometer only) | ±4, ±8, ±12, ±16 gauss |
| Interface | I2C, SPI | I2C, SPI | I2C only | I2C, SPI | I2C, SPI |
| Current Consumption (Normal Mode) | 180 µA | 180 µA | 300 µA | 11 µA (low power mode) | 270 µA |
| Supply Voltage | 1.71V to 3.6V | 1.71V to 3.6V | 2.16V to 3.6V | 1.71V to 3.6V | 1.71V to 3.6V |
| FIFO Buffer | Yes (32 samples per sensor) | Yes (32 samples per sensor) | Yes (32 samples) | Yes (32 samples) | Yes (32 samples) |
Key Differentiators
- Combined accelerometer and magnetometer in a single package (vs LIS2DH12 + LIS3MDL (separate chips))
- Ultra-low power consumption (180 µA) (vs LSM303DLHC (300 µA))
- Wide magnetometer range (±50 gauss) (vs LSM303DLHC (±8.1 gauss))
Design Notes
Place the LSM303AGRTR away from ferromagnetic materials and high-current traces to avoid magnetic interference. Keep the sensor at least 5mm away from speakers, magnets, and inductors. Use a solid ground plane under the sensor to reduce noise. Place 100nF decoupling capacitors close to the VDD and VDD_IO pins. For I2C, use pull-up resistors (typically 4.7kΩ) to VDD_IO, sized according to bus capacitance and speed.
The LSM303AGRTR operates from 1.71V to 3.6V. Ensure the supply voltage is stable and within this range. Use a low-dropout regulator (LDO) if the main supply is higher than 3.6V. The VDD_IO pin can be connected to a different voltage level (e.g., 1.8V) to match the logic level of the host microcontroller. The typical current consumption is 180 µA in normal mode, but this can increase during data conversion. Provide adequate decoupling to handle transient currents.
Do not exceed the absolute maximum ratings, including supply voltage (4.8V) and input voltage on any pin. Ensure the I2C addresses are correctly configured: the accelerometer is at 0x19 and the magnetometer at 0x1E. If using SPI, the CS pin must be tied high when not in use. The self-test feature should be enabled during production testing to verify sensor functionality. Avoid placing the sensor near strong magnetic fields, which can saturate the magnetometer.
Compliance Information
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified. REACH compliance is assumed based on ST's general compliance, but not explicitly stated in the provided data.
