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STMicroelectronics LSM6DSRTR
- Part No.:
- LSM6DSRTR
- Manufacturer:
- STMicroelectronics
- Category:
- IMUs (Inertial Measurement Units)
- Package:
- 14-VFLGA Module
- Datasheet:
-
LSM6DSRTR.pdf
- Description:
- INEMO INERTIAL MODULE: 3D ACCELE
- Quantity:
- Payment:
- Shipping:
Inventory:13,111
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Product details
Overview
LSM6DSRTR from STMicroelectronics is a 3-axis digital accelerometer and 3-axis digital gyroscope system-in-package with ±2/±4/±8/±16 g full-scale acceleration range, ±125 to ±4000 dps angular rate range, 9 kbyte smart FIFO, embedded finite state machine (16 states), and auxiliary SPI for OIS data output. It delivers Android-compliant motion sensing for optical image stabilization in camera modules.
For engineers reviewing the LSM6DSRTR datasheet, LSM6DSRTR pinout, LSM6DSRTR application, or LSM6DSRTR equivalent, key selection criteria include OIS-ready dual-path signal processing, hardware-accelerated tilt detection and significant motion detection, MIPI I3CSM/SPI/I²C interface flexibility, and temperature-stable bias drift (<±0.1 mg/°C accel, <±0.005 dps/°C gyro).
Technical Context
The LSM6DSRTR integrates independent UI and OIS signal chains: accelerometer and gyroscope data are processed in parallel through configurable hardware paths, enabling simultaneous high-precision motion tracking and real-time camera stabilization. Its S4S synchronization supports Qualcomm sensor fusion with sub-millisecond timing alignment across I²C, MIPI I3CSM, and SPI interfaces.
Hardware-based features include a 16-state programmable finite state machine accepting inputs from internal sensors and up to four external sensors via I²C master mode, plus dedicated interrupt logic for free-fall, 6D orientation, click/double-click, and activity/inactivity events - all operating at ultra-low power without host CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accelerometer FS Range | ±2/±4/±8/±16 g - selectable per application; ±2 g enables highest resolution (0.061 mg/LSB) for vibration monitoring. |
| Gyroscope FS Range | ±125 to ±4000 dps - extended range supports drone attitude control and robotic joint motion without clipping. |
| Output Data Rate (ODR) | Up to 6.67 kHz - enables high-bandwidth motion capture for AR/VR gesture recognition and real-time OIS correction. |
| FIFO Depth | 9 kbytes with 2×–3× compression - reduces host polling frequency and system power by batching timestamped sensor data. |
| Power Consumption (HP Mode) | 1.2 mA total - combines gyro + accel in high-performance mode; 32 µA accel-only in low-power mode at 52 Hz ODR. |
| Temp Stability (Zero-G/Zero-Rate) | ±0.1 mg/°C accel offset drift, ±0.005 dps/°C gyro offset drift - ensures calibration retention across -40°C to +85°C industrial operation. |
| Interface Support | I²C (up to 1 MHz), SPI (10 MHz), MIPI I3CSM - enables coexistence with application processors and sensor hubs in mobile and edge devices. |
Pinout & Package
LSM6DSRTR is housed in a 14-pin LGA package (2.5 × 3.0 × 0.83 mm), optimized for space-constrained wearable and camera module designs. Pin functions vary by interface mode (I²C/SPI/master/Aux SPI); configuration is determined by external pull-up/down on SDx, SCx, CS, and SDO/SA0 pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SDO/SA0 | I²C address LSB / SPI data output | Configures slave address in I²C mode; outputs serial data in SPI 4-wire mode. |
| 2 SDx | Mode-select input | Determines interface mode: tied to Vdd_IO/GND selects I²C master, Aux SPI, or standard SPI/I²C slave. |
| 3 SCx | Mode-select input | Paired with SDx to define one of four operational modes including OIS-dedicated Aux SPI. |
| 4 INT1 | Programmable interrupt output | Asserts on hardware-detected events: free-fall, 6D orientation, click, pedometer step, or FSM state transition. |
| 5 Vdd_IO | I/O supply rail | Independent 1.62–3.6 V rail decoupled from core Vdd; enables level-shifting with host processors. |
| 6–7 GND | Ground reference | Dual ground pins minimize noise coupling between analog sensor core and digital I/O sections. |
| 8 Vdd | Analog/digital core supply | 1.71–3.6 V supply powering MEMS elements and signal conditioning circuitry. |
| 9 INT2/DEN | Secondary interrupt / data enable | Configurable as second event interrupt or DEN signal for synchronized data capture with external sensors. |
| 10 OCS_Aux | Aux SPI chip select | Enables auxiliary SPI interface exclusively for OIS data path in Mode 3/4 - isolates camera stabilization traffic. |
| 11 SDO_Aux | Aux SPI data output | Outputs gyroscope/accelerometer OIS data independently of main interface - critical for latency-sensitive stabilization. |
| 12 CS | Main interface mode select | High = I²C/MIPI I3CSM enabled; Low = SPI enabled - defines primary communication protocol. |
| 13 SCL/SPC | Clock input | Serves as I²C/MIPI clock or SPI port clock depending on CS state; supports up to 10 MHz SPI timing. |
| 14 SDA/SDI | Data bidirectional I/O | Functions as I²C/MIPI data line or SPI input/output - supports 3-wire SPI with shared data line. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-path signal processing | Separate hardware pipelines for UI motion sensing and OIS data output eliminate contention and reduce latency to <1 ms. |
| Embedded finite state machine (FSM) | 16 independent, user-programmable state machines process accel/gyro/external sensor inputs - enables gesture recognition without host CPU. |
| Hardware tilt detection | Uses only accelerometer data to detect posture transitions (e.g., sit-to-stand) with <5 µA active current and immunity to walking motion. |
| Significant Motion Detection (SMD) | Generates interrupt on location-change-level motion using accelerometer-only hardware logic - extends battery life in GPS-assisted tracking. |
| Smart FIFO with compression | 9 kbyte buffer compresses timestamped multi-sensor data up to 3×, reducing host read frequency and system power by >40%. |
Applications
| Optical Image Stabilization (OIS) | Augmented/Virtual Reality (AR/VR) |
|---|---|
|
Use Scenario: Real-time correction of hand tremor and micro-motion during smartphone video capture. IC Role / Device Role / Timing Role: Dual-path OIS sensor providing synchronized, low-latency gyroscope and accelerometer data via dedicated auxiliary SPI. Use Value: Enables sub-pixel image shift compensation at 2 kHz update rate, improving video stability without increasing host processor load. |
Use Scenario: Head and controller tracking in untethered VR headsets requiring sub-20 ms motion-to-photon latency. IC Role / Device Role / Timing Role: High-ODR (6.67 kHz) inertial measurement unit delivering fused orientation data with hardware timestamping. Use Value: Reduces motion sickness by maintaining consistent pose estimation during rapid head rotation, leveraging 5 mdps/√Hz gyro noise density. |
| Wearable Activity Monitoring | Industrial Drone Navigation |
|
Use Scenario: Continuous step counting and activity classification (walking, running, cycling) in fitness bands with multi-day battery life. IC Role / Device Role / Timing Role: Hardware-accelerated pedometer, tilt detector, and significant motion engine operating autonomously in low-power mode. Use Value: Achieves 32 µA accelerometer-only current at 52 Hz ODR while maintaining accurate step detection across temperature (-40°C to +85°C). |
Use Scenario: Attitude estimation and vibration damping in compact delivery drones operating in GPS-denied indoor environments. IC Role / Device Role / Timing Role: High-stability 6-axis IMU with ±4000 dps gyroscope range and <±0.007 %/°C sensitivity drift for robust AHRS performance. Use Value: Maintains heading accuracy within ±1° over full temperature range without recalibration, enabling reliable autonomous flight path following. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 6-axis inertial sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LSM6DSOXTR | Includes embedded machine learning core (MLC) and higher FIFO (16 kB); identical pinout and register map. | Better suited for on-device AI inference (e.g., fall detection, gesture classification) but consumes ~15% more power in HP mode. | Select LSM6DSOXTR when firmware-level ML acceleration is required; LSM6DSRTR remains optimal for cost-sensitive OIS and Android sensor hub use cases. |
| ICM-42688-P | Lower noise floor (3.8 mdps/√Hz gyro), integrated digital temperature compensation, but no auxiliary SPI or S4S sync support. | Lacks dedicated OIS hardware path and Android-certified FSM - requires host-side processing for tilt/SMD functions. | Choose ICM-42688-P for ultra-low-noise IMU applications where OIS offloading and Android compliance are not required. |
Compared with LSM6DSOXTR, the LSM6DSRTR trades MLC capability for lower power and proven Android certification; versus ICM-42688-P, it provides hardware OIS isolation and S4S synchronization essential for camera subsystem integration.
Availability
LSM6DSRTR is available at Aetrix Electronics and suitable for optical image stabilization, augmented reality headsets, and wearable activity trackers requiring stable component supply across automotive-grade temperature ranges (-40°C to +85°C).
Supply support for LSM6DSRTR 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 MEMS, power management, microcontrollers, and automotive ICs.
The LSM6DSRTR belongs to ST's iNEMO inertial module family, designed specifically for always-on, low-power motion sensing in smartphones, wearables, and IoT edge devices with stringent Android compatibility requirements.
FAQ
What interface modes does the LSM6DSRTR support, and how are they configured?
The LSM6DSRTR supports four configurable interface modes: standard I²C/SPI slave (Mode 1), I²C master for external sensors (Mode 2), auxiliary SPI for gyroscope-only OIS (Mode 3), and auxiliary SPI for both accelerometer and gyroscope OIS (Mode 4). Configuration is set by pulling SDx and SCx pins to Vdd_IO or GND at power-up; CS pin selects between I²C/MIPI I3CSM (high) and SPI (low).
How does the LSM6DSRTR implement hardware tilt detection without consuming significant power?
Tilt detection uses only the accelerometer's low-power path with dedicated hardware logic that monitors axis-aligned gravity vector transitions. It operates autonomously at 32 µA (52 Hz ODR) and ignores transient accelerations like walking - triggering only on sustained posture changes (e.g., sit-to-stand), verified by characterization across -40°C to +85°C.
Can the LSM6DSRTR simultaneously output OIS data and UI motion data without interference?
Yes - it employs physically separate signal paths: the OIS chain routes gyroscope and accelerometer data through dedicated auxiliary SPI pins (OCS_Aux, SDO_Aux, SDx, SCx), while UI data flows via main I²C/SPI. Both paths support independent full-scale and ODR settings, ensuring zero contention and deterministic latency for camera stabilization.
What is the role of the embedded finite state machine (FSM), and how many states can it execute?
The LSM6DSRTR includes 16 independent, user-programmable finite state machines that accept inputs from its accelerometer, gyroscope, and up to four external sensors (via I²C master mode). Each FSM executes custom motion pattern recognition - such as wrist flick or double-shake - entirely in hardware, generating interrupts without host CPU involvement or additional firmware overhead.
LSM6DSRTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- iNEMO
- Package/Case:
- 14-VFLGA Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Sensor Type:
- Accelerometer, Gyroscope, Temperature, 6 Axis
- Output Type:
- I2C, SPI
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-LGA (2.5x3)
- Mounting Type:
- Surface Mount
LSM6DSRTR FAQ
1.How can I place an order for LSM6DSRTR through Aetrix?
Please submit a Request for Quotation (RFQ) for LSM6DSRTR 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 LSM6DSRTR reliable?
The price and inventory of LSM6DSRTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LSM6DSRTR is usually 5 days.
3.What payment methods are accepted for LSM6DSRTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LSM6DSRTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LSM6DSRTR?
LSM6DSRTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LSM6DSRTR 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 LSM6DSRTR?
For technical support, including LSM6DSRTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LSM6DSRTR requirements.
6.How does Aetrix verify that LSM6DSRTR is sourced from the original manufacturer or authorized distributors?
All LSM6DSRTR 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 LSM6DSRTR meets industry standards.
7.What is the process for return or replacement of LSM6DSRTR?
All LSM6DSRTR units undergo pre-shipment inspection (PSI). If there is an issue with LSM6DSRTR, 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 LSM6DSRTR part is unused and in its original packaging.
Return procedure for LSM6DSRTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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