H3LIS331DLTR

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FAQ

Q: When should I use the H3LIS331DLTR vs a standard accelerometer?
A: The H3LIS331DLTR is a specialized high-g sensor, not a replacement for standard accelerometers. Use it in addition to a ±16 g accelerometer (LIS3DH, LIS2DH12, or the accelerometer in your 6-axis IMU). The standard accelerometer handles attitude estimation (0–2 g range), while the H3LIS3

Q: Can the H3LIS331DLTR be used for drone attitude estimation?
A: No. At ±100 g scale, the sensitivity is 3.1 mg/LSB — far too coarse for tilt measurement where sub-millig sensitivity is needed. The noise floor of 300 µg/√Hz at the maximum ODR of 1 kHz produces significant noise in the gravity vector. Use a standard ±2/±16 g

Q: How do I set the impact detection threshold in firmware?
A: Configure the INT1_THS register (0x32) with the desired threshold in mg. For example, to trigger at 50 g on the ±100 g scale: threshold = 50,000 mg / 49 mg/digit ≈ 1,020 (0x3FC). Set the INT1_DURATION register to specify how long the acceleration must exceed the threshold (in ODR cycles

1. Product Overview

The H3LIS331DLTR is STMicroelectronics' high-g 3-axis MEMS accelerometer with programmable full scales of ±100/±200/±400 g — designed for measuring extreme acceleration events that would saturate standard ±16 g sensors. Packaged in TFLGA-16 (3×3×1 mm), it survives shocks up to 10,000 g and provides 16-bit digital output over I²C/SPI interfaces. In drone applications, it serves as the dedicated impact and crash sensor — recording the precise acceleration profile during crashes, hard landings, and collision events for post-incident forensic analysis, while standard accelerometers handle routine attitude estimation. The H3LIS331DLTR fills a unique niche in the drone sensor ecosystem: (1) crash forensics — logging the 3-axis a

2. Key Features

• ±400 g Full Scale — Capture Extreme Drone Impact Events
• 10,000 g Shock Survivability — Survives the Crash It's Measuring
• 16-Bit Digital Output — High-Resolution Impact Profiling
• Low-Power 10 µA Mode — Always-On Impact Watchdog
• I²C + SPI Dual Interface — Easy FC Integration

3. Technical Specifications

4. Applications

• Drone Crash Forensics & Failure Analysis
• Impact-Activated Emergency Safety Systems
• Structural Load Monitoring & Design Validation
• Racing & Freestyle Pilot Performance Analysis
• Drop/Impact Testing for Drone Package Delivery

5. Supply Solutions

Aurora supports customers with H3LIS331DLTR — High-g 3-Axis MEMS Accelerometer ±400 g for Drone Impact & Shock Detection by STMicroelectronics sourcing through verified global supply channels. We help OEMs and manufacturers manage availability challenges, production requirements, and lifecycle risks with flexible procurement solutions.

6. Quality Assurance

All components supplied by Aurora follow strict quality control procedures, including supplier verification, documentation review, inspection, and traceability management to ensure product authenticity and reliability.

7. Alternative & Replacement Solutions

When original H3LIS331DLTR — High-g 3-Axis MEMS Accelerometer ±400 g for Drone Impact & Shock Detection by STMicroelectronics components face shortages, lifecycle changes, or long lead times, Aurora helps customers identify suitable alternative components based on technical requirements, application needs, and supply conditions.

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