Overview
The FXLS8471QR1 is a highly versatile 3-axis linear accelerometer produced by NXP USA Inc. This device is designed to offer superior performance in noise density, board mount offset, and temperature stability. It features integrated motion detection capabilities, including tilt, shake, and tap detection, along with a vector magnitude output that simplifies implementation and reduces power consumption. The accelerometer is available in a compact 3 mm x 3 mm x 1 mm QFN package and supports both SPI and I²C serial digital interfaces, making it compatible with a wide range of applications.
Key Specifications
| Specification | Value |
|---|---|
| Sensing Range - Accelerometer | ±2g, ±4g, ±8g |
| Sensing Axis | X, Y, Z |
| Sensor Case / Package | QFN (3 mm x 3 mm x 1 mm) |
| Sensitivity (Typical) | 4096 LSB/g, 2048 LSB/g, 1024 LSB/g |
| Output Data Rates (ODR) | 1.563 Hz to 800 Hz |
| Noise Density | Typically 99 μg/√Hz in low-noise mode @ 200-Hz bandwidth |
| ADC Resolution | 14-bit |
| Supply Voltage (VDD) | 1.95 V to 3.6 V |
| Supply Voltage (VDDIO) | 1.62 V to 3.6 V |
| Operating Temperature Range | –40 °C to +105 °C |
| Interface | SPI (up to 1 MHz), I²C (Normal and Fast modes) |
Key Features
- Dynamically selectable acceleration full-scale ranges of ±2g, ±4g, and ±8g
- Programmable output data rates (ODR) from 1.563 Hz to 800 Hz
- Low noise density: typically 99 μg/√Hz in low-noise mode @ 200-Hz bandwidth
- 14-bit ADC resolution for acceleration measurements
- Embedded programmable acceleration event functions:
- Freefall and motion detection
- Transient detection
- Vector-Magnitude change detection
- Pulse and tap detection (single and double)
- Orientation detection (portrait/landscape)
- Programmable automatic ODR change using Auto-Wake and return to Sleep functions to save power
- 192-byte FIFO buffer capable of storing up to 32 samples of X/Y/Z data
- Integrated self-test function and temperature sensor with 8-bit output resolution
Applications
- Automotive convenience and security: tilt sensing, orientation detection, vibration sensing
- Navigation applications
- Industrial IoT: asset tracking, equipment monitoring (vibration analysis, machine health)
- Medical: patient and activity monitors
- Consumer devices: wearables, portable electronics
- Sensing & Instrumentation, Imaging, Video & Vision, Power Management, Consumer Electronics
Q & A
- What is the sensing range of the FXLS8471QR1 accelerometer?
The FXLS8471QR1 has a sensing range of ±2g, ±4g, and ±8g.
- What are the supported interfaces for the FXLS8471QR1?
The FXLS8471QR1 supports both SPI (up to 1 MHz) and I²C (Normal and Fast modes) interfaces.
- What is the operating temperature range of the FXLS8471QR1?
The FXLS8471QR1 operates over the extended temperature range of –40 °C to +105 °C.
- What are the key features of the FXLS8471QR1's motion detection capabilities?
The device includes features such as freefall and motion detection, transient detection, vector-magnitude change detection, pulse and tap detection, and orientation detection.
- How does the FXLS8471QR1 manage power consumption?
The FXLS8471QR1 includes programmable automatic ODR change using Auto-Wake and return to Sleep functions to save power.
- What is the resolution of the FXLS8471QR1's ADC?
The FXLS8471QR1 has a 14-bit ADC resolution for acceleration measurements.
- What is the noise density of the FXLS8471QR1?
The noise density is typically 99 μg/√Hz in low-noise mode @ 200-Hz bandwidth.
- What is the package type and size of the FXLS8471QR1?
The FXLS8471QR1 is packaged in a 3 mm x 3 mm x 1 mm QFN package.
- Is the FXLS8471QR1 compliant with environmental regulations?
Yes, the FXLS8471QR1 is RoHS compliant and meets other environmental standards such as EU RoHS, ELV, and China RoHS.
- What are some common applications of the FXLS8471QR1?
Common applications include automotive, navigation, industrial IoT, medical devices, and consumer electronics.
