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FXLS8962AFR1

3-axis digital accelerometer, ±2-16g, 12-bit, 1µA @ 6.25Hz, I2C/SPI, DFN-10

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Pieza del fabricante：

FXLS8962AFR1

Paquete：

DFN-10 (2 x 2 x 0.95 mm)

Marca：
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Descripción

Productos

The NXP FXLS8962AFR1 is a 3-axis low-power digital accelerometer with AEC-Q100 qualification, designed for automotive and industrial IoT motion sensing. Featuring a 12-bit resolution and selectable full-scale ranges from ±2 g to ±16 g, it consumes as little as 1 µA in low-power mode. Housed in a compact 10-pin DFN (2 x 2 mm) package, it supports both I2C and SPI interfaces.

Especificaciones

Axes 3 (X, Y, Z)
Full-Scale Range ±2 g / ±4 g / ±8 g / ±16 g
Resolution 12-bit
Output Data Rate 0.78 Hz to 3200 Hz
Current (Active, 6.25 Hz) ≤ 1 µA
Current (Standby) 650 nA
Interface I2C (up to 1 MHz) / SPI (up to 4 MHz)
Tensión de alimentación 1.71 V to 3.6 V
Temperatura de funcionamiento -40 °C to +105 °C
Paquete DFN-10 (2 x 2 x 0.95 mm)

Características

  • AEC-Q100 qualified for automotive applications
  • Ultra-low power: ≤ 1 µA at 6.25 Hz, 20 µA at 400 Hz
  • 650 nA standby, 50 nA hibernate mode
  • SDCD (Sensor Data Change Detection) for motion/no-motion/freefall events
  • 32-sample FIFO/LIFO buffer (144 bytes)
  • Auto-wake/sleep for autonomous power management
  • Bidirectional self-test diagnostic
  • Single-wire interface for ultra-low-power motion wake-up

Aplicaciones

  • Automotive key fob motion wake-up
  • Asset tracking and inventory management
  • Machine condition monitoring
  • Smart home appliance orientation detection

The NXP FXLS8962AFR1 is a compact 3-axis MEMS accelerometer optimized for ultra-low-power motion detection in automotive and industrial IoT applications. With selectable full-scale ranges of ±2 g to ±16 g and 12-bit resolution, it delivers accurate acceleration measurements across diverse sensing scenarios. The device consumes just 1 µA in active mode at 6.25 Hz, dropping to 650 nA in standby and 50 nA in hibernate mode, making it ideal for battery-powered systems. The integrated SDCD block enables autonomous detection of motion, no-motion, freefall, and vector magnitude changes without MCU intervention. A 32-sample FIFO/LIFO buffer reduces host MCU read frequency, further saving system power. The device supports both I2C (up to 1 MHz) and SPI (up to 4 MHz) interfaces for flexible integration. Note: This product is EOL; NXP recommends the pin/software-compatible FXLS8964AF/67AF for automotive or FXLS8974CF for industrial new designs.

The FXLS8962AFR1 uses a capacitive MEMS sensing element to detect acceleration. A proof mass suspended by silicon springs moves relative to fixed electrodes when subjected to acceleration, changing the capacitance between the moving and fixed plates. An ASIC converts these capacitance changes into a digital signal through a sigma-delta ADC, applies digital filtering, and outputs the result via I2C or SPI. The SDCD (Sensor Data Change Detection) block operates autonomously: it compares acceleration data against configurable thresholds to detect events such as freefall (acceleration below threshold on all axes), motion (deviation from reference), and no-motion (stability over a time window). When an event is detected, an interrupt is generated to wake the host MCU. The auto-wake/sleep mechanism automatically transitions between active and low-power modes based on the SDCD detection, enabling always-on sensing at microampere current levels. The FIFO/LIFO buffer stores up to 32 samples, allowing the MCU to read data in bursts rather than per-sample, reducing bus traffic and MCU wake-up frequency.

Pin Nombre Tipo Función
1 VDD Potencia Supply voltage (1.71-3.6V)
2 BT_MODE Entrada Boot mode select (GND=default, VDD=motion detect)
3 SA0/SPI_MISO E/S I2C address LSB / SPI data out
4 SDA/SPI_MOSI/SPI_DATA E/S I2C data / SPI data in (4-wire) or bidirectional (3-wire)
5 SCL/SCLK Entrada I2C clock / SPI clock
6 INT2/EXT_TRIG/BOOT_OUT E/S Interrupt 2 / external trigger / boot output
7 SPI_CS_B/WAKE_UP Entrada SPI chip select (active low) / hibernate wake-up
8 INT1/MOT_DET E/S Interrupt 1 / motion detect I/O
9 INTF_SEL Entrada Interface select (VDD=SPI, GND=I2C)
10 GND Suelo Supply return
  • Automotive key fob with motion-activated wake-up
  • Asset tracking with tamper and movement detection
  • Smart appliance orientation sensing (iron, washing machine)
  • Medical patient activity and respiratory monitoring
Fabricante Número de pieza Paquete Notas
NXP FXLS8964AFR1 DFN-10 Pin/SW compatible replacement (automotive)
NXP FXLS8974CFR1 DFN-10 Pin/SW compatible replacement (industrial)
ST LIS2DW12TR LGA-12 Similar ultra-low-power 3-axis accelerometer
Bosch BMA456 LGA-12 Low-power 3-axis accelerometer
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