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STMicroelectronics LSM9DS1TR
- Part No.:
- LSM9DS1TR
- Manufacturer:
- STMicroelectronics
- Category:
- IMUs (Inertial Measurement Units)
- Package:
- 24-TFLGA Module
- Datasheet:
-
LSM9DS1TR.pdf
- Description:
- IMU ACCEL/GYRO/MAG I2C/SPI 24LGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,996
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Product details
Overview
LSM9DS1TR from STMicroelectronics is a 3-in-1 inertial measurement unit (IMU) integrating a 3D accelerometer, 3D gyroscope, and 3D magnetometer in a single LGA-24L package. It delivers ±2/±4/±8/±16 g acceleration range, ±245/±500/±2000 dps angular rate range, and ±4/±8/±12/±16 gauss magnetic field range with 16-bit output resolution, supporting indoor navigation and motion-aware UIs in compact handheld devices.
For engineers reviewing the LSM9DS1TR datasheet, LSM9DS1TR pinout, LSM9DS1TR application, or LSM9DS1TR equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (including FIFO, eco-power, and interrupt-driven motion detection), and real-world use cases for gesture recognition, VR input, and orientation-sensitive display control.
Technical Context
The LSM9DS1TR implements independent digital signal paths for each sensor domain: accelerometer data is processed through configurable low-pass filters (LPF1/LPF2) with ODR up to 1.6 kHz; gyroscope supports high-pass filtering for motion artifact rejection and offers programmable full-scale ranges with 16-bit output; magnetometer uses dedicated biasing and oversampling to achieve stable DC field measurement.
It features dual serial interfaces-hardware-isolated I²C (100/400 kHz) and SPI (4-wire or 3-wire)-with separate slave addresses for accelerometer/gyroscope (0x6A/0x6B) and magnetometer (0x1E), enabling concurrent sensor reads without bus contention. Power management includes per-sensor enable/disable control and an "always-on" eco mode drawing just 1.9 mA total.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Acceleration Full Scale | ±2/±4/±8/±16 g - selectable via CTRL_REG6_XL; determines dynamic range and resolution trade-off for impact detection or tilt sensing. |
| Gyroscope Full Scale | ±245/±500/±2000 dps - configured via CTRL_REG1_G; higher ranges suit fast rotation (e.g., gaming controllers), lower ranges optimize sensitivity for slow-motion tracking. |
| Magnetometer Full Scale | ±4/±8/±12/±16 gauss - set by CTRL_REG2_M; enables calibration flexibility across varying ambient field strengths (e.g., indoor vs. near-metal environments). |
| Data Output Resolution | 16-bit - all three sensors provide signed 16-bit LSB values; eliminates need for external ADC and simplifies host-side scaling. |
| Digital Interfaces | I²C (100/400 kHz) + SPI (up to 10 MHz) - dual-bus support allows coexistence with other peripherals and deterministic timing for real-time motion fusion. |
| Supply Voltage | 1.9 V to 3.6 V - compatible with single-cell Li-ion and coin-cell power rails; internal regulators decouple analog/digital domains for noise immunity. |
| Eco Power Mode | 1.9 mA typical - combines low-ODR accelerometer sampling, gyroscope sleep, and magnetometer duty cycling for battery-constrained wearables. |
Pinout & Package
LGA-24L (3.5 × 3.0 × 1.0 mm) plastic land grid array package, rated for operation from –40 °C to +85 °C. RoHS-compliant, ECOPACK®-certified, and optimized for automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Analog & digital supply | 1.9–3.6 V main power input; requires local 100 nF ceramic decoupling per ST layout guidelines. |
| VDD_IO | I/O voltage reference | Independent 1.71–3.6 V rail for logic interface compatibility; may differ from VDD for mixed-voltage systems. |
| SCL/SPC | I²C clock / SPI clock | Shared pin: I²C SCL when I²C enabled; SPI SPC when CS low and I²C disabled via SDO/SA0 configuration. |
| SDA/SDI | I²C data / SPI data in | Shared pin: bidirectional I²C data line; SPI MOSI input during write operations. |
| SDO/SA0 | I²C address select / SPI data out | Configures I²C slave address (0x6A or 0x6B); outputs SPI MISO data when CS active and I²C disabled. |
| CS | SPI chip select | Active-low enable for SPI mode; must be held high to use I²C interface exclusively. |
| INT1 / INT2 | Programmable interrupt outputs | Dedicated open-drain outputs for motion events (click, FIFO threshold, data ready, orientation change) - configurable per sensor domain. |
Key Features
| Feature | Design Value |
|---|---|
| Embedded FIFO (3 kB) | Reduces host MCU polling overhead and enables burst read of time-aligned accel/gyro/mag samples - critical for sensor fusion algorithms. |
| Click/double-click detection | Hardware-accelerated event engine using configurable thresholds and duration windows - offloads gesture logic from application processor. |
| Position & motion detection | On-chip state machine identifies free-fall, wake-up, orientation (6D/4D), and activity/inactivity - enables instant system wake from ultra-low-power sleep. |
| Temperature sensor | Integrated 16-bit digital sensor (±1.5 °C accuracy) - supports real-time thermal compensation of gyro bias and mag offset drift. |
| Independent sensor power control | Each sensor block (accel, gyro, mag) can be enabled/disabled individually - allows dynamic power budgeting (e.g., gyro off during static orientation hold). |
Applications
| Indoor Navigation | Smart User Interfaces |
|---|---|
Use Scenario: Pedestrian dead reckoning in GPS-denied environments (e.g., shopping malls, airports). IC Role / Device Role / Timing Role: IMU fuses accelerometer, gyroscope, and magnetometer data to estimate step count, heading, and displacement with <1% drift/hour. Use Value: Enables turn-by-turn guidance without cellular or Wi-Fi assistance; leverages 16-bit resolution and low-noise gyro for accurate angular integration. |
Use Scenario: Tap-and-hold, swipe, and tilt-based interaction on portable displays. IC Role / Device Role / Timing Role: Provides real-time 9-axis motion vector at up to 1.6 kHz ODR; triggers INT1 on orientation change or click event. Use Value: Reduces host CPU load via hardware interrupt generation and embedded FIFO buffering - extends battery life in always-on UIs. |
| Gaming Input Devices | VR/AR Motion Tracking |
Use Scenario: Wireless gamepad with motion-controlled aiming and gesture commands. IC Role / Device Role / Timing Role: Delivers low-latency (<5 ms) 9-axis data stream with ±2000 dps gyro range for rapid weapon recoil simulation. Use Value: Supports sub-degree orientation accuracy via magnetometer-assisted yaw stabilization - prevents drift during extended play sessions. |
Use Scenario: Head-mounted display (HMD) head tracking with sub-10 ms end-to-end latency. IC Role / Device Role / Timing Role: Supplies synchronized accel/gyro/mag samples to Kalman filter; temperature sensor compensates gyro bias drift in real time. Use Value: Achieves <2° RMS orientation error under dynamic motion; eco-power mode enables >8 hours runtime on 300 mAh battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 9-axis inertial sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICM-20948 | Higher gyro noise density (0.004 dps/√Hz vs. 0.0035), integrated DMP for sensor fusion, but no embedded magnetometer - requires external AK09916. | Better suited for high-dynamic-range industrial motion capture where external mag calibration is acceptable. | Choose if on-chip sensor fusion (DMP) is prioritized over single-package integration and cost-per-function. |
| BNO055 | Fully calibrated 9-axis output via built-in fusion algorithm; fixed ±2 g / ±2000 dps / ±1300 µT ranges; no user-accessible raw registers. | Ideal for plug-and-play orientation output (quaternion/euler), not for custom fusion or low-level sensor tuning. | Choose when rapid time-to-market matters more than raw data access or parameter flexibility. |
Compared with ICM-20948 and BNO055, the LSM9DS1TR uniquely balances raw sensor configurability, integrated magnetometer, and ultra-low eco-power mode - making it optimal for battery-powered devices requiring both precision motion capture and flexible firmware-level fusion.
Availability
LSM9DS1TR is available at Aetrix Electronics and suitable for indoor navigation systems, smart wearable interfaces, gaming peripherals, and VR/AR motion tracking modules requiring stable component supply across multi-year production cycles.
Supply support for LSM9DS1TR 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, Switzerland, specializing in microcontrollers, sensors, power ICs, and automotive-grade components.
The LSM9DS1TR belongs to ST's iNEMO inertial module family, designed specifically for space-constrained, battery-operated consumer and industrial devices demanding high-accuracy 9-axis motion sensing with minimal host processing overhead.
FAQ
What communication protocols does the LSM9DS1TR support?
The LSM9DS1TR supports both I²C (standard and fast mode: 100 kHz and 400 kHz) and SPI (4-wire and 3-wire configurations). The I²C interface uses separate slave addresses for the accelerometer/gyroscope (0x6A/0x6B) and magnetometer (0x1E), while SPI operates with a single chip-select line and shared clock/data lines. Hardware pin configuration (SDO/SA0 and CS) determines active interface mode.
How does the LSM9DS1TR manage power in battery-operated devices?
The LSM9DS1TR implements granular power control: each sensor (accelerometer, gyroscope, magnetometer) can be independently enabled or placed in power-down mode. Its "always-on" eco power mode draws only 1.9 mA total by combining low-ODR accelerometer sampling, gyroscope sleep, and magnetometer duty cycling - ideal for wearables and remote sensors needing multi-day battery life.
Can the LSM9DS1TR detect gestures like tap or double-tap without host processor involvement?
Yes - the LSM9DS1TR includes dedicated hardware engines for click and double-click detection. These functions use configurable acceleration thresholds (ACT_THS), duration windows (ACT_DUR), and interrupt routing (INT1_CTRL/INT2_CTRL) to generate autonomous interrupts, eliminating continuous host polling and reducing system-level power consumption.
Is the LSM9DS1TR's magnetometer susceptible to hard iron or soft iron distortion?
Yes - like all MEMS magnetometers, the LSM9DS1TR's magnetometer is affected by nearby ferromagnetic materials and current-carrying traces. However, it supports factory and runtime offset calibration via OFFSET_X/Y/Z_REG_M registers, and its ±4 to ±16 gauss full-scale range allows selection of optimal sensitivity for the target environment - mitigating saturation in distorted fields.
LSM9DS1TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 24-TFLGA Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Sensor Type:
- Accelerometer, Gyroscope, Magnetometer, Temperature, 9 Axis
- Output Type:
- I2C, SPI
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-LGA (3x3.5)
- Mounting Type:
- Surface Mount
LSM9DS1TR FAQ
1.How can I place an order for LSM9DS1TR through Aetrix?
Please submit a Request for Quotation (RFQ) for LSM9DS1TR 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 LSM9DS1TR reliable?
The price and inventory of LSM9DS1TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LSM9DS1TR is usually 5 days.
3.What payment methods are accepted for LSM9DS1TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LSM9DS1TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LSM9DS1TR?
LSM9DS1TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LSM9DS1TR 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 LSM9DS1TR?
For technical support, including LSM9DS1TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LSM9DS1TR requirements.
6.How does Aetrix verify that LSM9DS1TR is sourced from the original manufacturer or authorized distributors?
All LSM9DS1TR 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 LSM9DS1TR meets industry standards.
7.What is the process for return or replacement of LSM9DS1TR?
All LSM9DS1TR units undergo pre-shipment inspection (PSI). If there is an issue with LSM9DS1TR, 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 LSM9DS1TR part is unused and in its original packaging.
Return procedure for LSM9DS1TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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