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STMicroelectronics LIS2DW12TR
- Part No.:
- LIS2DW12TR
- Manufacturer:
- STMicroelectronics
- Category:
- Accelerometers
- Package:
- 12-WFLGA
- Datasheet:
-
LIS2DW12TR.pdf
- Description:
- ACCEL 2-16G I2C/SPI 12LGA
- Quantity:
- Payment:
- Shipping:
Inventory:7,428
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Product details
Overview
LIS2DW12TR from STMicroelectronics is an ultralow-power 3-axis MEMS accelerometer with ±2g/±4g/±8g/±16g selectable full scale, 16-bit digital output, and integrated motion-detection engine supporting tap/double-tap, free-fall, activity/inactivity, and stationary/motion detection. It operates from 1.62 V to 3.6 V, consumes as low as 50 nA in power-down mode, and delivers 1.3 mg RMS noise in low-power mode - ideal for battery-constrained wearables and portable healthcare devices.
For engineers reviewing the LIS2DW12TR datasheet, LIS2DW12TR pinout, LIS2DW12TR application, or LIS2DW12TR equivalent, key selection criteria include its dual I²C/SPI interface, 32-level FIFO, embedded temperature sensor, self-test capability, and configurable ODR range (1.6 Hz to 1600 Hz) with four low-power operating modes optimized for motion-triggered power management.
Technical Context
The LIS2DW12TR implements a dedicated internal motion-processing engine that executes real-time acceleration analysis-including 6D/4D orientation, portrait/landscape detection, and highly configurable single/double-tap recognition-without host processor intervention. Its architecture supports independent I/O supply (VDD_IO), enabling flexible voltage domain interfacing with microcontrollers operating at 1.8 V or 3.3 V logic levels.
It features two distinct operating mode sets (low-noise enabled/disabled), each with five selectable modes: one high-performance (14-bit, 90–120 µA @ 100 Hz) and four low-power variants (12–14-bit, 0.38–32 µA @ 100 Hz). Turn-on time for on-demand conversion ranges from 1.20 ms (LP mode 1) to 3.55 ms (LP mode 4), synchronized via INT2 clock input or register write.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.62 V to 3.6 V - supports direct integration with Li-ion battery-powered systems without LDO overhead. |
| Power-Down Current | 50 nA - enables multi-year operation in always-on sensor nodes with periodic wake-up triggers. |
| Low-Power Mode Noise | 1.3 mg RMS (FS ±2 g, LP mode 4) - sufficient for reliable gesture recognition and tap detection in wearables. |
| Output Data Rate | 1.6 Hz to 1600 Hz - allows dynamic trade-off between latency, resolution, and power across use cases from inertial navigation to display rotation. |
| FIFO Depth | 32-level - buffers sequential acceleration samples to reduce host polling frequency and extend MCU sleep duration. |
| Interface Support | I²C (up to 1 MHz fast-mode plus) and SPI (up to 10 MHz) - ensures compatibility with legacy and high-speed embedded controllers. |
| Shock Survivability | 10000 g / 0.2 ms - maintains structural integrity during drop events in handheld medical and consumer devices. |
Pinout & Package
Package: LGA-12 (2.0 mm × 2.0 mm × 0.7 mm), land grid array with exposed pad for thermal and mechanical stability. RoHS-compliant, ECOPACK® certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCL/SPC | I²C clock / SPI clock | Shared bidirectional clock line; supports standard/fast-mode I²C and 3-/4-wire SPI protocols. |
| 2 CS | SPI chip select / I²C mode enable | Pulled up internally; logic low selects SPI, high enables I²C communication. |
| 3 SDO/SA0 | SPI data out / I²C address LSB | Configures I²C slave address (0x18 or 0x19); outputs acceleration data in SPI read cycles. |
| 4 SDA/SDI/SDO | I²C data / SPI data in / SPI data out | Tri-state bidirectional bus pin; handles serial data transfer in both protocols. |
| 5 NC | No connect | Internally unconnected; may be tied to VDD, VDD_IO, or GND per PCB layout requirements. |
| 6 & 8 GND | Analog/digital ground | Dual ground pins minimize noise coupling between sensor core and digital interface sections. |
| 7 RES | Reset input | Active-low reset pin; must be tied to GND for normal operation (no external pull-up required). |
| 9 VDD | Analog/digital core supply | Powers MEMS sensing element and signal chain; decoupling capacitor required near pin. |
| 10 VDD_IO | I/O supply | Independent voltage rail for digital interface; allows level-shifting between 1.8 V and 3.3 V systems. |
| 11 INT2 | Interrupt 2 / clock input | Configurable as interrupt output or external clock trigger for on-demand data conversion. |
| 12 INT1 | Interrupt 1 | Drives DRDY, FIFO flags, and motion-event interrupts (tap, free-fall, activity) to host MCU. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-power operation | 50 nA power-down and sub-1 µA active low-power modes enable multi-year battery life in hearables and wireless sensors. |
| Integrated motion engine | Hardware-accelerated tap/double-tap, free-fall, activity/inactivity, and 6D orientation detection offloads CPU and reduces firmware complexity. |
| Configurable ODR and bandwidth | Four low-power modes with programmable ODR (1.6–200 Hz) and filter bandwidths (180–3200 Hz) optimize noise/power for specific motion profiles. |
| Self-test capability | Electrostatic self-test verifies MEMS functionality in-system without physical movement, ensuring reliability in sealed medical enclosures. |
| Temperature sensor | Embedded 8-/12-bit temperature sensor (±15 °C offset, 1–16 LSB/°C) enables on-chip thermal compensation of offset and sensitivity drift. |
Applications
| Wearable Motion Tracking | Smart Hearing Aids |
|---|---|
|
Use Scenario: Continuous step counting and posture monitoring in fitness bands and smartwatches. IC Role / Device Role / Timing Role: Primary 3-axis motion sensor providing real-time acceleration data for activity classification algorithms. Use Value: 1.3 mg RMS noise and Android stationary detection enable accurate motion/no-motion discrimination with <1 µA average current draw. |
Use Scenario: Tap-to-control and fall-detection in compact, battery-powered hearing aids. IC Role / Device Role / Timing Role: Low-latency tap recognizer and free-fall detector triggering emergency alerts or UI state changes. Use Value: Sub-millisecond turn-on time (1.20 ms) and hardware double-tap engine allow responsive user interaction without MCU wake-up overhead. |
| Portable Healthcare Monitors | Wireless Sensor Nodes |
|
Use Scenario: Fall detection and gait analysis in remote patient monitoring patches. IC Role / Device Role / Timing Role: High-shock survivability (10000 g) and embedded self-test ensure functional safety in clinical-grade wearable deployments. Use Value: Factory-calibrated zero-g offset (±20 mg) and temperature-compensated sensitivity (0.01 %/°C) maintain accuracy across body-worn thermal environments. |
Use Scenario: Long-life environmental sensing nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: On-demand data acquisition triggered by external clock or register write, minimizing active time. Use Value: 32-level FIFO stores burst measurements during intermittent wake-ups, reducing radio transmission frequency and extending node lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-axis ultralow-power accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LSM6DSOXTR | 6-axis (accel + gyro), higher power (150 µA HP mode), no self-test on accel-only path | Requires gyro fusion; less suitable for pure motion-triggered power saving | Choose when 6D orientation and angular rate are needed alongside acceleration. |
| BMI270 | Lower noise (90 µg/√Hz), higher cost, no integrated temperature sensor | Lacks on-chip thermal compensation - requires external calibration in precision healthcare use | Prefer for ultra-low-noise inertial measurement where temperature drift is managed externally. |
Compared with LSM6DSOXTR and BMI270, the LIS2DW12TR uniquely balances sub-µA power, integrated motion processing, factory-calibrated temperature compensation, and shock resilience - making it optimal for cost-sensitive, battery-limited wearables requiring robust tap/fall detection without gyro dependency.
Availability
LIS2DW12TR is available at Aetrix Electronics and suitable for wearable motion tracking, portable healthcare monitors, smart hearing aids, and wireless sensor nodes requiring stable component supply across extended temperature ranges (−40 °C to +85 °C) and long product lifecycles.
Supply support for LIS2DW12TR 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 with over 40 years of industrial innovation.
The LIS2DW12TR belongs to ST's "femto" family of ultralow-power accelerometers, designed specifically for energy-constrained portable and medical devices demanding high accuracy, motion intelligence, and long-term reliability in miniaturized form factors.
FAQ
What is the minimum supply voltage for reliable operation of the LIS2DW12TR?
The LIS2DW12TR operates reliably from 1.62 V to 3.6 V on VDD and 1.62 V to (VDD + 0.1) V on VDD_IO. Below 1.62 V, internal regulation fails and sensor output becomes undefined; operation at 1.62 V is validated across −40 °C to +85 °C with full functionality including self-test and FIFO.
How does the single data conversion on-demand mode reduce system power consumption?
In on-demand mode, the LIS2DW12TR remains in power-down (50 nA) until triggered by either an INT2 clock pulse or a register write. After a fixed turn-on time (1.20–3.55 ms depending on LP mode), it acquires one sample set, stores it in FIFO or registers, asserts DRDY on INT1, then returns to power-down - eliminating continuous sampling overhead.
Can the LIS2DW12TR detect double-tap events without host processor involvement?
Yes - the LIS2DW12TR contains dedicated hardware logic for configurable double-tap detection. Parameters like axis selection, threshold, latency, and quiet time are programmed into registers (TAP_THS_X/Y/Z, TAP_DUR, TAP_LATENCY, TAP_WINDOW), and detection generates an interrupt on INT1 without CPU polling or firmware execution.
Is the internal temperature sensor calibrated, and what is its resolution?
The embedded temperature sensor is factory-trimmed and provides 8-bit output (1 LSB/°C) in high-performance mode and 12-bit output (16 LSB/°C) in low-power modes. Offset is ±15 °C at 25 °C, and refresh rate matches the selected ODR - e.g., 50 Hz at 100 Hz ODR - enabling real-time thermal compensation of accelerometer offset and sensitivity.
LIS2DW12TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 12-WFLGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Digital
- Axis:
- X, Y, Z
- Acceleration Range:
- ±2g, 4g, 8g, 16g
- Sensitivity (LSB/g):
- 4098 (±2g) ~ 512 (±16g)
- Sensitivity (mV/g):
- -
- Bandwidth:
- 400Hz
- Output Type:
- I2C, SPI
- Voltage - Supply:
- 1.62V ~ 3.6V
- Features:
- Selectable Scale
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LGA (2x2)
LIS2DW12TR FAQ
1.How can I place an order for LIS2DW12TR through Aetrix?
Please submit a Request for Quotation (RFQ) for LIS2DW12TR 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 LIS2DW12TR reliable?
The price and inventory of LIS2DW12TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LIS2DW12TR is usually 5 days.
3.What payment methods are accepted for LIS2DW12TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LIS2DW12TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LIS2DW12TR?
LIS2DW12TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LIS2DW12TR 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 LIS2DW12TR?
For technical support, including LIS2DW12TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LIS2DW12TR requirements.
6.How does Aetrix verify that LIS2DW12TR is sourced from the original manufacturer or authorized distributors?
All LIS2DW12TR 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 LIS2DW12TR meets industry standards.
7.What is the process for return or replacement of LIS2DW12TR?
All LIS2DW12TR units undergo pre-shipment inspection (PSI). If there is an issue with LIS2DW12TR, 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 LIS2DW12TR part is unused and in its original packaging.
Return procedure for LIS2DW12TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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