LIS344ALHTR - 3-Axis ±2/±6g Analog MEMS Accelerometer | STMicroelectronics
N.º de pieza: LIS344ALHTR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $10.32 | $10,32 |
| 10 | $9.5 | $95,00 |
| 100 | $7.85 | $785,00 |
| 500 | $6.2 | $3.100,00 |
| 1.000 | $5.1 | $5.100,00 |
| 3.000 | $4.3 | $12.900,00 |
LIS344ALHTR Descripción general
An accelerometer is an inertial sensor that measures proper acceleration along one or more axes. Capacitive MEMS accelerometers use a suspended proof-mass whose displacement unbalances a differential capacitor; demodulation electronics then produce an analog output voltage proportional to acceleration. The LIS344ALH belongs to the family of low-power, signal-conditioned linear accelerometers used in consumer and industrial motion-sensing applications.
Key features include ratiometric analog outputs whose offset and sensitivity scale with the supply voltage, embedded self-test capability, and 10,000 g shock survivability. Typical noise floor is 190 µg/√Hz, enabling detection of small tilt or vibration signals. The wide supply range (2.4 V – 3.6 V) and low current consumption (~0.65 mA at 3 V) suit portable, battery-powered designs.
Architecturally, the LIS344ALHTR combines a three-axis capacitive sensing element with a CMOS signal-conditioning ASIC. Outputs are buffered and ratiometric, simplifying ADC interfacing by eliminating the need for a precise reference. The user-selectable ±2 g / ±6 g full-scale range is set via a logic-level FS pin, allowing one part to serve both high-g and low-g applications. Embedded self-test verifies mechanical and electronic integrity without external fixtures.
Typical applications include tilt and inclination sensing in handheld devices, motion-activated user interfaces, vibration monitoring in industrial equipment, free-fall detection for hard-disk protection, robotics posture estimation, and gaming peripherals. The 1.8 kHz mechanical bandwidth also supports platform-stabilization loops and structural-vibration logging.
When designing with this part, place 100 nF decoupling capacitors close to the supply pin, route output traces over a continuous ground plane to minimize noise pickup, and use a clean low-impedance 3V3 regulator. Use the self-test feature at power-up to detect mechanical damage on the proof mass.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, delivering actionable sourcing and selection data alongside the verified specifications.
Alternativas directas para LIS344ALHTR — 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 LIS344ALHTR (mismo factor de forma y huella) — difiere en Operating Temperature, Package, Supply Voltage.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LIS344ALETR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LIS344ALH
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LIS3DSHTR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LIS3DHTR
✅ Sustitución directa✓ En stock
$1.2 / unidad
Ver hoja de datos →ADXL335BCPZ
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LIS344ALHTR Valores máximos y características eléctricas
| Product Type | MEMS Accelerometer |
| Axis | X, Y, Z |
| Acceleration Range | ±2 g, ±6 g (user-selectable) |
| Tipo de salida | Analog, ratiometric |
| Bandwidth | 1.8 kHz |
| Tensión de alimentación | 2.4 V to 3.6 V |
| Corriente de alimentación | 0.65 mA typical |
| Temperatura de funcionamiento | -40 °C to +85 °C |
| Shock Survivability | 10,000 g |
| Encapsulado | 16-LGA (4 mm × 4 mm) |
| Self-Test | Yes (embedded, ST pin) |
| Estado RoHS | Compliant |
| Lead-Free Status | Lead-Free |
| Nivel MSL | MSL3 (per ST datasheet) |
Configuración de pines de LIS344ALHTR
| Pin 1 | Vdd — Power supply (2.4 V to 3.6 V) |
| Pin 2 | GND — Ground |
| Pin 3 | ST — Self-test enable (logic input) |
| Pin 4 | FS — Full-scale select (0 = ±6 g; 1 = ±2 g) |
| Pin 5 | Xout — X-axis analog output |
| Pin 6 | Yout — Y-axis analog output |
| Pin 7 | Zout — Z-axis analog output |
| Pin 8 | NC — Not connected (per datasheet) |
| Pin 9 | NC — Not connected (per datasheet) |
| Pin 10 | NC — Not connected (per datasheet) |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
Aplicaciones típicas
LIS344ALHTR es adecuado para 7 aplicacións: Tilt and Inclination Sensing in Handheld Devices, Free-Fall and Shock Detection for Hard-Disk Protection, Vibration Monitoring for Industrial Predictive Maintenance, Motion-Activated User Interfaces, Robotics Posture and Tilt Estimation, Gaming Peripherals and Motion Controllers, Medical Patient-Movement Monitoring.
Tilt and Inclination Sensing in Handheld Devices
The LIS344ALHTR is well-suited to handheld device tilt/inclination sensing because of its low 0.65 mA supply current, ratiometric analog outputs, and user-selectable ±2 g scale that captures typical handheld tilt dynamics (0 to ~1 g axis range). Designers wire the X, Y, Z outputs to MCU ADCs and compute roll/pitch from the three static gravity components. Compared with digital-output accelerometers like the LIS3DHTR, the analog chain here avoids I²C/SPI driver overhead and lets the MCU sleep between slow ADC conversions, which is ideal for remote controls, e-readers, and consumer appliances that only sample orientation occasionally.
Recomendado
Free-Fall and Shock Detection for Hard-Disk Protection
Hard-disk drop protection requires an accelerometer with wide enough g range to capture multi-second fall signatures (~6 g peak) and a bandwidth that catches the leading edge of impact. The LIS344ALHTR's ±6 g selectable full scale, 1.8 kHz mechanical bandwidth, and 10,000 g shock survivability satisfy these requirements for 2.5-inch HDDs and SSDs. Polling the Z output via MCU ADC at 1 kHz with software thresholds (e.g. ±3 g on Z) triggers a park-head command within milliseconds of detecting free-fall. Compared with a digital-output alternative like the ADXL345, this analog path keeps firmware simple and deterministic.
Recomendado
Vibration Monitoring for Industrial Predictive Maintenance
Industrial pumps, motors, and bearings emit characteristic vibration signatures in the 10 Hz to 1 kHz range that change amplitude and harmonic content as wear progresses. The LIS344ALHTR's 1.8 kHz mechanical bandwidth and ratiometric ±6 g range cover most rotating-equipment spectral content, while the analog output lets the designer feed an external envelope detector or DSP for FFT analysis. Three-axis sensing means imbalance, misalignment, and bearing-race faults can be separated by comparing axial vs radial RMS levels. Source: ST LIS344AL datasheet application section and Analog Devices AN-111.
Recomendado
Motion-Activated User Interfaces
Gesture and tap UI in remotes, game controllers, and wearables can be built on the LIS344ALHTR's 1.8 kHz bandwidth and threshold-zero-g level. The analog outputs are polled at several kHz by an MCU, with double-tap or tilt gestures detected by simple software debounce and peak detection. Choosing the ±6 g range keeps single-axis gestures well within the linear range while still supporting shake-to-wake. Compared with digital-output accelerometers offering built-in tap detection, this part avoids the I²C/SPI interrupt latency and gives the designer direct control over thresholds.
Recomendado
Robotics Posture and Tilt Estimation
Robot platforms and AGVs use accelerometers to track chassis level, arm orientation, and emergency-tip events. The LIS344ALHTR's three analog axes give the robot controller a redundant gravity vector that complements gyros and wheel encoders, while the ±2 g scale maps ~90° tilt gestures cleanly into the linear output range. Polling all three axes lets the MCU compute pitch and roll in real time using atan2. Compared with analog alternatives like the ADXL335, this part's selectable range and industrial -40 to +85 °C rating suit the wider temperature swings of robotics applications.
Recomendado
Gaming Peripherals and Motion Controllers
Gaming peripherals and motion-tracked controllers use low-latency accelerometer readings to add inertial cues to user input. The LIS344ALHTR's 1.8 kHz bandwidth and 0.65 mA current are well-matched to USB/BT-powered controllers, and the ratiometric output simplifies the analog front-end with a 3.3 V rail that scales with USB supply variation. Three-axis analog outputs sampled at several hundred Hz feed the game controller's MCU, which fuses the gestures with button and gyro data for natural character movement.
Recomendado
Medical Patient-Movement Monitoring
Bed-exit alarms, fall detectors, and patient activity loggers benefit from low-noise analog acceleration. The LIS344ALHTR's ~190 µg/√Hz noise floor (per ST datasheet) lets clinicians distinguish normal respiration-related motion from a significant movement event. The analog chain is easy to galvanically isolate for IEC 60601 patient-safety compliance. Source: ST LIS344ALHTR datasheet and medical-grade application notes.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LIS344ALHTR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LIS344ALETR | LIS3DSHTR | LIS3DHTR | ADXL335BCPZ |
|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | Analog Devices |
| Package | 16-LGA (4x4 mm) | 16-LGA (4x4 mm) - same | 16-LGA (4x4 mm) - same | 16-LGA (4x4 mm) - same | 16-LFCSP (4x4 mm) - same footprint |
| Output Type | Analog (ratiometric) | Analog (ratiometric) | Digital I²C/SPI | Digital I²C/SPI | Analog (ratiometric) |
| Acceleration Range | ±2 g / ±6 g selectable | ±2 g / ±6 g selectable | ±2 / ±6 / ±16 g selectable | ±2 / ±4 / ±8 / ±16 g selectable | ±3 g fixed |
| Supply Voltage | 2.4 V to 3.6 V | 2.4 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.8 V to 3.6 V |
| Bandwidth | 1.8 kHz | 1.8 kHz | Up to 1.6 kHz (digital filter) | Up to 5 kHz (digital filter) | 1.6 kHz (C=0.01 µF, BW = 1/(2π·R·C)) |
| Self-Test | Yes (ST pin) | Yes (ST pin) | Yes (register bit) | Yes (register bit) | Yes (ST pin) |
| Operating Temperature | -40 °C to +85 °C | 0 °C to +70 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
Diferenciadores clave
- User-selectable ±2 g / ±6 g full-scale via logic pin (frente a ADXL335BCPZ)
- Three-axis analog outputs with ratiometric scaling (frente a LIS3DHTR)
- Industrial -40 °C to +85 °C temperature range (frente a LIS344ALETR)
- Embedded self-test (frente a Generic MEMS accelerometer without ST pin)
Notas de diseño
Place a 100 nF (0.1 µF) X7R ceramic decoupling capacitor within 3 mm of the LIS344ALHTR Vdd pin, with a short, wide trace to the local ground plane. Estimated: Vdd surge current during enable is in the mA range; a low-ESR ceramic prevents dip on the rail that would couple into the analog output. Add a 10 µF bulk capacitor on the parent 3.3 V rail if the supply is sourced through long traces or a ferrite bead. (Estimated based on standard MEMS accelerometer decoupling practice; consult ST CD00180192 section 4 for the manufacturer-recommended network.)
Route the three analog outputs (Xout, Yout, Zout) over a continuous reference ground plane, keep them away from switching nodes (DC-DC converter SW, USB DP/DM, high-current motor traces), and use matched trace lengths if downstream ADC channels need to be sampled simultaneously. Keep the part rigidly mounted; mechanical stress on the LGA package can manifest as offset shift on the affected axis. Source: ST AN3214 accelerometer mounting notes.
Do not skip the FS pin — it must be tied to Vdd or GND. Leaving FS floating can cause the LIS344ALHTR to enter an indeterminate full-scale mode and produce unreliable acceleration readings. For designs that drive FS from an MCU GPIO, ensure the GPIO is configured before the LIS344ALHTR finishes its power-on ramp (≤10 ms); otherwise the part may come up in the wrong range on first boot.
Estimate: at full ±2 g full-scale with Vdd = 3.3 V, the LIS344ALHTR output is roughly Vdd/2 ± (sensitivity V/g × g). With sensitivity around 0.4 V/g (per ST datasheet typical value), a 1 g tilt produces ~400 mV of swing; ADC input-referred noise of the LIS344ALHTR (~190 µg/√Hz) gives a noise-limited tilt resolution in the millig range when oversampled. Use an external RC low-pass filter (1 kHz or lower) at the Xout/Yout/Zout pins if the ADC's sample rate is much lower than 1.8 kHz, to prevent aliasing of sensor self-noise.
Información de cumplimiento
RoHS compliant and lead-free per ST datasheet. Industrial temperature grade H (suffix) ranges from -40 to +85 °C. Not AEC-Q100 qualified — for automotive applications, consult ST for qualified LN-series or AIS-class accelerometers.
