LIS2DU12TR - Ultra-Low-Power 3-Axis Accelerometer, ±16g, I2C/SPI | STMicroelectronics
N.º de pieza: LIS2DU12TR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $5.2 | $5,20 |
| 10 | $4.68 | $46,80 |
| 100 | $4.15 | $415,00 |
| 500 | $3.74 | $1.870,00 |
| 1.000 | $3.31 | $3.310,00 |
LIS2DU12TR Descripción general
An accelerometer is a MEMS sensor that measures linear acceleration along one or more axes and converts it into an electrical signal; the LIS2DU12 is a three-axis digital accelerometer whose MEMS structure and ASIC were co-designed to deliver low noise and ultra-low current consumption. It belongs to the broader hierarchy of inertial sensors -> MEMS accelerometers -> motion sensors -> semiconductor components, and integrates high-level digital features such as a 128-level FIFO buffer, motion and free-fall detection, and a programmable interrupt generator that reduces host wake-ups.
Key features of the LIS2DU12TR include selectable resolution (8/10/12-bit, low-power modes), an embedded temperature sensor, and primary digital interfaces consisting of I2C/SPI (with MIPI I3C-compatible modes) and an auxiliary SPI for OIS or second-sensor pairing. Power consumption reaches sub-µA levels in the dedicated low-power modes, while one-shot and wake-up paths allow always-on operation in battery-powered designs. The supply range spans 1.62 V to 3.6 V and an independent VDDIO rail supports 1.8 V / 3.3 V mixed-voltage hosts.
The MEMS die uses a high-aspect-ratio capacitive sensing element whose deflection is read by a low-noise charge-sharing front end; on-chip digital processing performs offset, gain, and self-test calibration, and the integrated antialiasing filter suppresses out-of-band energy before data-rate decimation. An extended self-test routine checks the full signal path at every startup or on demand from the system controller.
Typical applications include wearable fitness bands, asset trackers, hearables and TWS earbuds, IoT vibration and tap detectors, smart-home security, handheld medical motion monitors, and always-on industrial tilt and free-fall sensors for logistics or hard-disk protection. Stacked with a magnetometer, it also serves as a 9-DoF IMU building block for portable navigation.
When designing with the LIS2DU12TR, place the device near a mechanically stiff region of the PCB, keep high-current traces away from the LGA, and follow the datasheet decoupling guidance (typically 0.1 µF + bulk on VDD and VDDIO). The wide range of FIFO and interrupt modes allows most use cases to be handled in event-driven firmware without continuous polling, dramatically reducing system power consumption.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.
Alternativas directas para LIS2DU12TR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LIS2DU12TR (mismo factor de forma y huella) — difiere en Embedded Features, Mounting Type, Operating Temperature, Output Data Rate, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LIS2DU12
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LIS2DU12TR
✅ Sustitución directa✓ En stock
$3.31 / unidad
Ver hoja de datos →LIS3DHTR
✅ Sustitución directa✓ En stock
$1.2 / unidad
Ver hoja de datos →LIS2DU12TR Valores máximos y características eléctricas
| Tipo de sensor | 3-axis linear accelerometer (digital) |
| Number of Axes | X, Y, Z |
| Acceleration Range | ±2 g / ±4 g / ±8 g / ±16 g (user-selectable) |
| Output Data Rate | 1.6 Hz to 800 Hz |
| Bandwidth | 0.8 Hz to 400 Hz |
| Output Interface | I2C / SPI / MIPI I3C-compatible |
| Auxiliary Interface | Auxiliary SPI (for OIS or sensor hub) |
| Supply Voltage (VDD) | 1.62 V to 3.6 V |
| I/O Supply (VDDIO) | 1.62 V to 3.6 V (independent) |
| Integrated FIFO | 128 levels |
| Embedded Features | Antialiasing filter, temperature sensor, motion / free-fall / wake-up interrupts, self-test |
| Encapsulado | 12-LGA (2.0 x 2.0 x 0.7 mm) |
| Temperatura de funcionamiento | -40 °C to +85 °C |
| Tipo de montaje | Surface Mount (LGA) |
| Estado RoHS | Compliant |
Configuración de pines de LIS2DU12TR
| Pin 1 | VDD — Main power supply (1.62 V to 3.6 V) |
| Pin 2 | VDDIO — I/O supply (1.62 V to 3.6 V, independent) |
| Pin 3 | GND — Ground |
| Pin 4 | SCL/SPC — I2C clock / SPI serial clock |
| Pin 5 | SDA/SDI/SDO — I2C data / SPI serial data in or out (3-wire SPI uses SDO) |
| Pin 6 | CS — Chip select (active high for SPI; tied for I2C) |
| Pin 7 | INT1 — Programmable interrupt 1 (open-drain) |
| Pin 8 | INT2 — Programmable interrupt 2 (open-drain) |
| Pin 9 | ADF1 — Auxiliary SPI function pin (per datasheet) |
| Pin 10 | ADF2 — Auxiliary SPI function pin (per datasheet) |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | NC — Not connected (per datasheet) |
Aplicaciones típicas
LIS2DU12TR es adecuado para 6 aplicacións: Wearable Fitness Bands, True Wireless Stereo (TWS) Earbuds and Hearables, IoT Vibration and Tap Detection, Smart-Home and Security Motion Sensing, Handheld Medical Motion Monitoring, Hard-Disk Drive Protection and Free-Fall Detection.
Wearable Fitness Bands
The LIS2DU12TR's sub-µA low-power modes and 128-level FIFO make it well suited for always-on activity tracking in wristbands and smartwatches. With selectable ±2g/±4g/±8g/±16g full-scale ranges and output data rates from 1.6 Hz to 800 Hz, the device can drive step counters, sleep tracking, and gesture recognition while keeping host wake-ups to a minimum. Compared with the LIS2DH12, the integrated analog antialiasing filter of the LIS2DU12TR reduces the BOM by eliminating an external RC; pair it with a Bluetooth LE SoC via the I2C/SPI/I3C interface for a typical battery life extending several weeks per charge.
Recomendado
True Wireless Stereo (TWS) Earbuds and Hearables
In TWS earbuds, the LIS2DU12TR enables tap and double-tap controls, in-ear detection, and head-tracking for spatial audio, all on a small 2 x 2 mm footprint with minimal current draw. The wide VDD range of 1.62 V to 3.6 V supports direct connection to a single-cell lithium-ion battery rail without an LDO. Designers can combine the accelerometer with the auxiliary SPI port to read an external OIS position sensor or a second MEMS IMU for bone-conduction microphones, while on-chip wake-up interrupts prevent the audio DSP from waking on spurious motion.
Recomendado
IoT Vibration and Tap Detection
Industrial IoT nodes can use the LIS2DU12TR to detect machine vibration patterns for predictive maintenance or to wake a wireless node on tap events. With an integrated analog antialiasing filter and selectable high-ODR modes up to 800 Hz, the device suppresses out-of-band mechanical noise that would otherwise saturate the host. The 1.62 V to 3.6 V supply and I2C/SPI connectivity integrate cleanly with sub-GHz or BLE SoCs in remote, battery-powered sensors deployed for asset tracking and condition monitoring.
Recomendado
Smart-Home and Security Motion Sensing
In wireless occupancy, glass-break, and intrusion-detection nodes, the LIS2DU12TR delivers low-noise acceleration readings at microamp-level quiescent current, supporting multi-year battery life on two AAA cells. The device's wake-up interrupt lets the host MCU stay in deep-sleep until motion is detected, and the 128-level FIFO captures transient events without frequent polling. Its 12-LGA 2 x 2 mm package fits inside small ceiling-mounted or door-and-window housings, and the auxiliary SPI can drive an additional intrusion sensor.
Recomendado
Handheld Medical Motion Monitoring
Patient-worn devices such as fall detectors, gait monitors, and rehabilitation bands benefit from the LIS2DU12TR's low noise floor, wide dynamic range, and integrated temperature sensor for ambient compensation. The on-chip FIFO plus event-driven interrupts reduce write cycles to flash, extending the medical-device service interval. Single supply operation from 1.8 V or 3.3 V rails simplifies integration with battery-backed medical subsystems, and the device's operating range of -40 °C to +85 °C accommodates body-temperature-adjacent electronics.
Recomendado
Hard-Disk Drive Protection and Free-Fall Detection
Inside portable computing and removable storage enclosures, the LIS2DU12TR detects free-fall events in milliseconds, allowing the host to park HDD read heads before impact and prevent data loss. The accelerometer's high-g ±16g range covers typical drop-test profiles, and the analog antialiasing filter suppresses vibration noise from fans and spinning disks. With I2C connectivity, the device drops directly onto existing HDD controller boards designed around earlier LIS2xx ST families, providing a software-compatible path to upgrade free-fall sensitivity and FIFO depth.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LIS2DU12TR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LIS2DU12 | LIS2DU12TR (cut-tape) | LIS3DHTR |
|---|---|---|---|---|
| Package | 12-LGA (2x2) | 12-LGA (2x2) - same | 12-LGA (2x2) - same | 16-LGA (3x3) - differs |
| Brand | STMicroelectronics | STMicroelectronics - same | STMicroelectronics - same | STMicroelectronics - same |
| Number of Axes | 3 (X, Y, Z) | 3 (X, Y, Z) | 3 (X, Y, Z) | 3 (X, Y, Z) |
| Full-Scale Range | ±2g / ±4g / ±8g / ±16g | ±2g / ±4g / ±8g / ±16g | ±2g / ±4g / ±8g / ±16g | ±2g / ±4g / ±8g / ±16g |
| Output Data Rate | 1.6 Hz to 800 Hz | 1.6 Hz to 800 Hz | 1.6 Hz to 800 Hz | 1 Hz to 5 kHz (wider) |
| Interface | I2C / SPI / MIPI I3C + aux SPI | I2C / SPI / MIPI I3C + aux SPI | I2C / SPI / MIPI I3C + aux SPI | I2C / SPI (no I3C, no aux SPI) |
| Supply Voltage | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.71 V to 3.6 V |
| FIFO | 128 levels | 128 levels | 128 levels | 32 levels |
| Integrated Antialiasing Filter | Yes (analog) | Yes (analog) | Yes (analog) | No (digital only) |
Diferenciadores clave
- Lower active power in LP modes than the LIS3DHTR (frente a LIS3DHTR)
- Integrated analog antialiasing filter removes external RC parts (frente a LIS3DHTR)
- Larger FIFO reduces host wake-ups (frente a LIS3DHTR)
- Native I3C and auxiliary SPI support (frente a LIS3DHTR)
Notas de diseño
Mount the LIS2DU12TR on a stiff section of the PCB free of mechanical stress and resonances; flex during reflow or enclosure pressure can offset zero-g output. Place 0.1 µF decoupling capacitors as close as possible to VDD (pin 1) and VDDIO (pin 2). Keep high-current traces, switching converters, and noisy digital buses away from the LGA footprint; a continuous ground ring beneath the sensor helps shield against common-mode noise and stabilizes the MEMS element reference plane.
The LIS2DU12TR achieves its sub-µA quiescent current only when operated in one of the dedicated low-power modes (LP, ULP) with interrupts enabled. Per the ST datasheet, continuous high-ODR operation raises consumption into the tens-of-µA range and is appropriate only for short bursts. To minimize total energy, set the FIFO watermark threshold to wake the host on burst-full rather than polling, and disable unused axes at the register level. Independent VDDIO allows the host MCU to be powered separately; designers can keep the MCU off and let the LIS2DU12TR wake the system via INT1/INT2.
Estimated: At a 1.8 V VDD and a typical active current of 4 µA, monthly standby energy is about 5.2 mWh — enough to keep a 100 mAh coin cell alive for several years. For auxiliary SPI/OIS configurations, route the second SPI bus with controlled 50 Ω impedance and keep stubs short; the aux SPI pins (ADF1/ADF2) are sensitive to reflection at high ODR. Avoid running the primary I2C/SPI bus parallel to motor or LED driver traces; use orthogonal crossings if layout requires. Finally, do not place any copper pour directly on top of the LGA — guard the area to avoid mechanical coupling through the package body.
A common pitfall is to mistake the analog antialiasing filter's bandwidth for full ESD protection; the LIS2DU12TR requires normal handling procedures for moisture-sensitive devices per JEDEC J-STD-020 (MSL handling). Do not run I2C above 400 kHz without verifying pull-up values for the VDDIO rail; pull-up resistors too strong will keep the bus from meeting timings at low VDDIO. When using self-test, run it in the highest-resolution mode for greatest sensitivity to mechanical fault detection. Resist the urge to use the auxiliary SPI on the LIS2DU12TR as a generic GPIO — it has dedicated OIS timing and polarity requirements.
Información de cumplimiento
RoHS and lead-free status per ST's product page. Not AEC-Q100 qualified by default; for automotive applications consult ST's automotive-grade equivalents in the AIS2xxx or ASM330 family.
