LSM303AGRTR - 3D Accelerometer & Magnetometer | STMicroelectronics
N.º de pieza: LSM303AGRTR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 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 |
LSM303AGRTR Descripción general
An accelerometer is a sensor that measures proper acceleration, which is the rate of change of velocity of a body in its own instantaneous rest frame. In the context of motion sensing, accelerometers are used to detect tilt, vibration, and shock. A magnetometer measures the strength and direction of magnetic fields, commonly used for compass applications and detecting magnetic anomalies. The LSM303AGRTR combines both sensors in one package, enabling applications such as orientation detection, navigation, and gesture recognition. This integration reduces board space and simplifies design compared to using separate accelerometer and magnetometer components.
Key features of the LSM303AGRTR include a 16-bit resolution for both accelerometer and magnetometer, a programmable interrupt system, and a built-in temperature sensor. The accelerometer offers selectable full-scale ranges of ±2g, ±4g, ±8g, and ±16g, while the magnetometer provides a range of ±50 gauss. The device supports both I2C and SPI communication, with I2C addresses 0x19 and 0x1E for the accelerometer and magnetometer respectively. The LSM303AGRTR also features a FIFO buffer for data storage, reducing host processor load, and an embedded self-test capability for functional verification.
The LSM303AGRTR is fabricated using a proprietary micromachining process that integrates the sensing elements and signal conditioning circuitry on a single chip. The accelerometer uses a capacitive sensing principle, while the magnetometer uses a magneto-resistive principle. The device includes a 16-bit ADC for each channel, ensuring high-resolution measurements. The low power consumption, with typical current draw of 180 µA in normal mode and 2 µA in power-down mode, makes it suitable for battery-powered applications. The device also includes a smart power management system that automatically switches between power modes based on data rate and activity.
Typical applications for the LSM303AGRTR include mobile phones and tablets for screen rotation and gaming, wearable devices for step counting and activity tracking, and IoT devices for motion-based control. It is also used in robotics for orientation and navigation, and in industrial equipment for vibration monitoring. The combination of accelerometer and magnetometer enables accurate heading and tilt compensation in compass applications, which is critical for navigation systems.
When designing with the LSM303AGRTR, it is important to consider the placement of the sensor to avoid magnetic interference from nearby components such as speakers or motors. The device should be placed away from ferromagnetic materials and high-current traces. Additionally, proper decoupling capacitors (100 nF) should be placed close to the VDD and VDD_IO pins to ensure stable operation. The I2C pull-up resistors should be sized appropriately for the bus capacitance and speed.
Alternativas directas para LSM303AGRTR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LSM303AGRTR (mismo factor de forma y huella) — difiere en Operating Temperature, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LSM303AGR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LIS2DH12TR
⚡ Mismo encapsulado ⚠️ Especificaciones sin verificar✓ En stock
$0.67 / unidad
Ver hoja de datos →LIS3MDL
⚡ Mismo encapsulado ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LSM303AGRTR Valores máximos y características eléctricas
| Accelerometer Range | ±2g, ±4g, ±8g, ±16g |
| Magnetometer Range | ±50 gauss |
| Accelerometer Resolution | 16-bit |
| Magnetometer Resolution | 16-bit |
| Tensión de alimentación | 1.71 V to 3.6 V |
| Interfaz | I2C, SPI |
| I2C Address (Accelerometer) | 0x19 |
| I2C Address (Magnetometer) | 0x1E |
| Current Consumption (Normal Mode) | 180 µA |
| Current Consumption (Power-Down) | 2 µA |
| Temperatura de funcionamiento | -40°C to +85°C |
| Encapsulado | LGA-12 (2x2x1 mm) |
| Tipo de montaje | Surface Mount |
| FIFO Buffer | Yes |
| Self-Test | Yes |
| Estado RoHS | Compliant |
Configuración de pines de LSM303AGRTR
| 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 |
Aplicaciones típicas
LSM303AGRTR es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LSM303AGRTR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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) |
Diferenciadores clave
- Combined accelerometer and magnetometer in a single package (frente a LIS2DH12 + LIS3MDL (separate chips))
- Ultra-low power consumption (180 µA) (frente a LSM303DLHC (300 µA))
- Wide magnetometer range (±50 gauss) (frente a LSM303DLHC (±8.1 gauss))
Notas de diseño
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.
Información de cumplimiento
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.
