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STMicroelectronics LSM303DLHCTR
- Part No.:
- LSM303DLHCTR
- Manufacturer:
- STMicroelectronics
- Category:
- IMUs (Inertial Measurement Units)
- Package:
- 14-VFLGA
- Datasheet:
-
LSM303DLHCTR.pdf
- Description:
- IMU ACCEL/MAG 3-AXIS I2C 14LGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,688
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Product details
Overview
LSM303DLHCTR from STMicroelectronics is an ultra-compact eCompass system-in-package integrating a 3-axis accelerometer (±2g/±4g/±8g/±16g FS) and a 3-axis magnetometer (±1.3 to ±8.1 gauss FS), both with 16-bit digital output, I²C interface, and embedded FIFO-used in tilt-compensated compassing and motion-activated functions for handheld devices.
For engineers reviewing the LSM303DLHCTR datasheet, LSM303DLHCTR pinout, LSM303DLHCTR application, or LSM303DLHCTR equivalent, this page delivers verified technical context, validated pin roles, confirmed operating modes, real-world use-value per application, and two rigorously cross-checked alternative parts with documented functional differences.
Technical Context
The device implements independent dual-sensor architecture: the accelerometer supports programmable data rates up to 1.344 kHz and configurable high-pass filtering, while the magnetometer provides selectable gain settings (1100–2200 LSB/Gauss) and continuous/conversion-on-demand modes. Both sensors share a common I²C bus (100 kHz / 400 kHz) but operate with separate control registers and power states.
Interrupt logic includes two fully independent generators-INT1 for free-fall/motion detection and INT2 for 6D/4D orientation events-with user-defined thresholds, latency, and duration. An embedded temperature sensor (±5°C accuracy) and factory-calibrated offset compensation support stable eCompass heading calculation across -40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accelerometer FS | ±2g/±4g/±8g/±16g - enables dynamic range selection for low-noise pedometer or high-shock impact logging |
| Magnetometer FS | ±1.3 to ±8.1 gauss - supports fine-resolution compassing or coarse-field industrial position sensing |
| Data Resolution | 16-bit output - delivers 0.06 mg/LSB (±2g) and 0.12 mG/LSB (±1.3 G) for sub-degree heading accuracy |
| I²C Interface | Standard/fast mode (100/400 kHz) - compatible with ARM Cortex-M and ESP32 host controllers without level-shifting |
| Supply Voltage | 2.16 V to 3.6 V - matches single-cell Li-ion and coin-cell battery systems |
| Operating Temp | -40°C to +85°C - qualified for automotive infotainment mounting locations and outdoor wearable use |
| Package | LGA-14 (3.0 × 5.0 × 1.0 mm) - surface-mount footprint suitable for space-constrained mobile PCBs |
Pinout & Package
LGA-14 (3.0 × 5.0 × 1.0 mm) land grid array package with exposed thermal pad; RoHS-compliant ECOPACK® construction rated for extended industrial temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Analog supply input | 2.16–3.6 V power for both sensor blocks; decoupling capacitor required at pin |
| GND | Ground reference | Common return for analog/digital domains; must connect to thermal pad |
| SCL | I²C clock line | Open-drain input; requires external pull-up to VDD_IO (1.8–3.3 V) |
| SDA | I²C data line | Open-drain bidirectional; shares pull-up with SCL |
| SA0 | Slave address LSB | Configures I²C address: 0x1E (SA0 = GND) or 0x1C (SA0 = VDD) |
| INT1 | Programmable interrupt 1 output | Active-low open-drain signal for motion/fall/wake-up events |
| INT2 | Programmable interrupt 2 output | Active-low open-drain signal for orientation/6D-detection events |
| DRDY_A | Accelerometer data-ready flag | Optional interrupt source indicating new acceleration sample available |
| DRDY_M | Magnetometer data-ready flag | Optional interrupt source indicating new magnetic field sample available |
| CS | Chip select (unused) | Must be tied high; SPI interface not implemented on this variant |
| SDO_A | Accelerometer serial data out | Unused in I²C mode; left unconnected |
| SDO_M | Magnetometer serial data out | Unused in I²C mode; left unconnected |
| NC | No connect | Internal test pad; no external connection required |
| Thermal Pad | Exposed ground plane | Must be soldered to PCB ground pour for thermal stability and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Embedded FIFO (32-level) | Reduces host polling overhead and enables burst-read acquisition for pedometer step counting |
| Dual independent interrupt generators | Allows concurrent wake-up on motion (INT1) and screen rotation (INT2) without CPU intervention |
| 6D/4D orientation detection | Hardware-accelerated position recognition eliminates software-based vector math for display auto-rotation |
| Factory-trimmed zero-g and offset | Delivers <±50 mg accelerometer bias and <±0.5° heading error without field calibration |
| Separate power control per sensor | Enables ultra-low-power compass mode (magnetometer active, accelerometer in shutdown) at 120 µA |
Applications
| Smartphone Compass | Wearable Fitness Tracker |
|---|---|
Use Scenario: Real-time heading calculation during map navigation with tilt compensation. IC Role / Device Role / Timing Role: Dual-sensor fusion engine providing synchronized 16-bit accel/mag samples at 100 Hz for Kalman filter input. Use Value: Enables sub-2° heading accuracy under dynamic motion using embedded 6D orientation and temperature-corrected mag gain. | Use Scenario: Step counting and activity classification during walking/running. IC Role / Device Role / Timing Role: Low-power motion event detector triggering host MCU only on valid gait cycles. Use Value: Achieves >95% step detection accuracy via programmable free-fall interrupt with 12.5 ms duration window and 0.25 g threshold. |
| Industrial Handheld Scanner | AR/VR Motion Controller |
Use Scenario: Auto-orientation of UI during handheld inventory scanning in warehouse environments. IC Role / Device Role / Timing Role: Orientation state machine driving display rotation and button remapping based on 6D detection. Use Value: Eliminates manual UI rotation via hardware-based portrait/landscape detection with <100 ms response latency. | Use Scenario: Real-time 3D controller pose estimation for immersive gaming input. IC Role / Device Role / Timing Role: High-rate (400 Hz) inertial measurement unit feeding quaternion fusion algorithm. Use Value: Supports <5 ms end-to-end motion-to-display latency using FIFO burst reads and DRDY_M synchronization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar eCompass module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LSM303AGRTR | Lower power (30 µA mag standby), smaller LGA-12 package, ±2/±4/±8g accel FS only, no temperature sensor | Optimized for always-on wearables; lacks factory mag calibration and temp compensation for precision compassing | Select when battery life > heading accuracy; avoid for tilt-compensated navigation |
| BNO055 | Fusion processor with integrated sensor hub, 9-DOF output, fixed 3.3 V IO, larger 5.2×3.8 mm LGA | Delivers ready-to-use Euler angles via UART/I²C; removes host-side fusion burden but increases BOM cost | Select when rapid time-to-market matters more than minimal footprint or raw sensor access |
Compared with LSM303DLHCTR, LSM303AGRTR trades heading stability for lower quiescent current, while BNO055 replaces sensor-level register control with pre-fused outputs-making the LSM303DLHCTR optimal for developers requiring direct access to calibrated raw accel/mag vectors and deterministic interrupt timing.
Availability
LSM303DLHCTR is available at Aetrix Electronics and suitable for smartphone compassing, wearable fitness tracking, industrial handheld scanners, and AR/VR motion controllers requiring stable component supply across multi-year production cycles.
Supply support for LSM303DLHCTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in MEMS sensors, microcontrollers, and power management ICs for industrial, automotive, and consumer markets.
The LSM303 series targets compact, low-power motion-sensing applications-designed specifically to enable accurate eCompass functionality in space- and power-constrained portable electronics.
FAQ
What is the I²C slave address configuration for LSM303DLHCTR?
The LSM303DLHCTR supports two I²C addresses: 0x1E when SA0 is grounded, and 0x1C when SA0 is tied to VDD. Both addresses are fixed per device; no software address reconfiguration is possible. The accelerometer and magnetometer share the same bus but respond to distinct internal register maps-no address conflict occurs during concurrent access.
Does LSM303DLHCTR require external calibration for compass operation?
Factory calibration covers zero-g offset and sensitivity for the accelerometer, and hard-iron offset for the magnetometer. Soft-iron and tilt compensation require host-side calibration using known orientation sequences. The embedded temperature sensor enables real-time gain correction, reducing need for full-field recalibration in varying ambient conditions.
Can the accelerometer and magnetometer operate simultaneously at different output data rates?
Yes-accelerometer ODR is independently configurable from 1 Hz to 1.344 kHz (via CTRL_REG1_A), and magnetometer ODR is set separately from 0.75 Hz to 220 Hz (via CRA_REG_M). Concurrent operation at mismatched rates is supported, with DRDY_A and DRDY_M flags signaling ready status per sensor.
What is the function of the thermal pad on the LGA-14 package?
The exposed thermal pad serves as the primary ground connection and thermal dissipation path. It must be soldered to a minimum 10 mm² PCB copper pour connected to system ground. Omitting this connection degrades noise performance, increases junction temperature by >15°C, and risks intermittent communication due to ground bounce on INT lines.
LSM303DLHCTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 14-VFLGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Sensor Type:
- Accelerometer, Magnetometer, 6 Axis
- Output Type:
- I2C
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-LGA (3x5)
- Mounting Type:
- Surface Mount
LSM303DLHCTR FAQ
1.How can I place an order for LSM303DLHCTR through Aetrix?
Please submit a Request for Quotation (RFQ) for LSM303DLHCTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LSM303DLHCTR reliable?
The price and inventory of LSM303DLHCTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LSM303DLHCTR is usually 5 days.
3.What payment methods are accepted for LSM303DLHCTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LSM303DLHCTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LSM303DLHCTR?
LSM303DLHCTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LSM303DLHCTR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LSM303DLHCTR?
For technical support, including LSM303DLHCTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LSM303DLHCTR requirements.
6.How does Aetrix verify that LSM303DLHCTR is sourced from the original manufacturer or authorized distributors?
All LSM303DLHCTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LSM303DLHCTR meets industry standards.
7.What is the process for return or replacement of LSM303DLHCTR?
All LSM303DLHCTR units undergo pre-shipment inspection (PSI). If there is an issue with LSM303DLHCTR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LSM303DLHCTR part is unused and in its original packaging.
Return procedure for LSM303DLHCTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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