IIS3DWB | STMicroelectronics | MEMS sensor module series | With robust and mature manufacturing process, the accelerometer and gyroscope products have been used in micro-mechanical processing, serving the automotive, industrial and consumer markets. The sensing element is manufactured using the specialized micro-mechanical processing technology of STMicroelectronics, while the embedded IC interface is developed using CMOS technology.

IIS3DWB has a self-check function, which allows the sensor function in the final application to be checked.IIS3DWB uses a plastic solder grid array (LGA) package to ensure normal operation over a wider temperature range (-40 °C to +105 ° C)

I. Core sensing parameters

1. Sensing architecture: **pure three-axis MEMS acceleration vibration sensor, no gyroscope**, designed for high-frequency vibration and impact monitoring

2.Programmable range: ± 2g / ± 4g / ± 8g / ± 16g, four options STMicroele...

3. ADC resolution: 16-bit high-precision analog-to-digital conversion

4. Maximum output rate ODR: 26.7kHz

5. Frequency response: DC ~ 6 kHz (-3 dB flat response), DC static tilt to high-frequency mechanical vibration can be covered, the frequency response curve is flat, and there will be no high-frequency signal attenuation distortion.

6. Power supply voltage: 2.1V-3.6V, compatible with industrial battery power supply, car low-voltage power supply

2. Temperature and environmental reliability

- Standard Edition IIS3DWB: Operating temperature range **-40℃ ~ + 105℃**

- High-temperature version IIS3DWBG: -40℃ ~ + 125℃, suitable for high-temperature points such as motors, inverters, and gearboxes

- Factory calibration, excellent sensitivity stability after impact, the sensing parameters are not easy to drift after many mechanical vibrations

- Complies with RoHS and ECOPACK environmental standards, industrial long-term production model

3. Package specifications

- Package: LGA-14L

- Size: 2.5 mm ×3.0 mm ×0.86 mm, ultra-thin chip package

- Item number roll belt shipment: IIS3DWBTR; Original factory long-term supply support 2. Sensing performance dimension (core core advantage)

1. **Ultra-low vibration noise**

The noise density of the three-axis mode is as low as 75μg / √Hz;The single-axis mode can reach as low as 60μg / √Hz, which can capture extremely weak early fault vibration signals of equipment, and identify bearing wear, loose screws, and motor eccentricity hazards in advance. STMicroele...。

2. Ultra-wide flat bandwidth

The bandwidth of ordinary accelerometers on the market is mostly 1-2 kHz; IIS3DWB can directly measure up to 6 kHz, from static tilt, low-frequency vibration to high-frequency resonance of bearings, and can replace traditional piezoelectric vibration probes, reducing hardware costs.

3. Excellent temperature stability

Built-in on-chip temperature sensor, can be used for temperature compensation; The sensitivity is very little affected by temperature fluctuations, and the motor cabin and outdoor equipment do not need to be recalibrated frequently.

4. Impact resistance

MEMS sensing structure is resistant to mechanical shock, suitable for installation in vibrating air compressors, gear reducers, and construction machinery shells.

III. Dimensions of built-in functions on the chip

1. **3KB high-capacity FIFO (First-In-First-Out) cache**

Cache three-axis vibration data; The vibration waveform will not be lost when the master MCU is busy and the wireless transmission is lagging; Supports batch reading, reduces frequent wake-up of the master, reduces the power consumption of the entire system, and wireless vibration monitoring nodes need to configure STMicroele...。

2. Programmable digital filter

The parameters of the high-pass and low-pass filters can be customized, which can filter out low-frequency environmental vibration interference and only capture the characteristic frequency corresponding to the device fault.

3. Hardware interrupt output

Configurable vibration threshold, impact-triggered interrupt; Notify the master controller immediately when the equipment shows abnormal vibration, and there is no need for the MCU to continuously poll and sample.

4. Built-in sensor self-check

The software triggers the self-check function, which automatically detects whether the three-axis sensing channel is faulty after the device is powered on, making it convenient for remote diagnosis of industrial equipment.

5. Sensor hub

It can be externally connected to other MEMS sensors to realize the collection of multi-sensor data.

IV. Power consumption mode dimension

1. Three-axis full-open high-performance mode: only 1.1m A working current, excellent power consumption performance in broadband sensors STMicroele...；

2. Configurable low-power sampling mode, single burst sampling;

3. The wireless vibration sensor and passive monitoring node powered by lithium batteries can achieve several years of battery life. 2. Core landing application scenarios (covering all niche areas)

1, Industrial Internet of Things | Predictive Maintenance of Equipment (core main scenario)

This is the most mainstream and widely used application scenario of IIS3DWB, which completely solves the industry pain point of traditional industrial equipment "after-sales maintenance and regular overhaul", and is widely adapted to online state monitoring of various types of rotating and reciprocating industrial machinery.

Applicable equipment: industrial motor, fan, water pump, air compressor, gearbox, reducer, conveyor belt equipment, injection molding machine, warm ventilation fan, cooling tower unit

Monitoring principle and landing value: equipment bearing wear, gear misalignment, screw loosening, lubrication failure, rotor eccentricity and other faults will generate high-frequency vibration characteristic signals. IIS3DWB, with its ultra-wide frequency response of 6 kHz, can precisely capture the vibration waveform of the entire frequency band, and identify early fault hazards through spectral analysis without the need for periodic manual inspection.

Advantages of the scheme: equipped with a 3KB FIFO cache, it can store vibration data in batches, reduce the frequent wake-up of the MCU, adapt to battery-powered wireless IoT sensing nodes, and the device can last for several years; Hardware vibration threshold interrupt function, can realize normal sleep, abnormal vibration active reporting, significantly reduce system power consumption and operation and maintenance costs, help factories to achieve intelligent predictive maintenance, avoid sudden shutdown losses.

2. New Energy Vehicles | High Temperature Vibration Diagnosis of Electric Drive System (G1 Exclusive Scenario)

Ordinary industrial sensors cannot withstand the high-temperature environment of the vehicle power compartment, while the high-temperature automotive version of IIS3DWBG1, with AEC-Q101 automotive certification and 125 ℃ extreme high-temperature characteristics, has become the exclusive solution for the state monitoring of new energy vehicle electric drive systems, and is the core sensing device of the vehicle's remote fault diagnosis system.

Monitoring points: new energy drive motor, transmission, high voltage inverter, power MOS module, bus bar, high voltage connector, buffer capacitor and other power core components

Landing value: The electric drive components of new energy vehicles are in a high temperature and high frequency vibration state for a long time, which is prone to hidden faults such as connector loosening, capacitor aging, motor coil resonance, and gear wear. IIS3DWBG 1 can collect vibration data of power components in real time, analyze the aging state of components through cloud data analysis, realize early warning and remote diagnosis of faults, reduce the risk of vehicle breakdown, and optimize the after-sales maintenance system of vehicle manufacturers to reduce after-sales maintenance costs.

3. Advanced Industrial Intelligent Monitoring | High-Precision Fault AI Identification (Exclusive Scenario for IIS3DWB10IS)

In response to the stringent monitoring requirements of high-end industrial precision equipment and ultra-high speed equipment,The IIS3DWB10IS features the ISPU2.0 intelligent sensing processor, with a bandwidth upgraded to 10kHz and a range of ±200g. It supports edge AI computations at the sensor level, eliminating the need for a main control MCU to participate in algorithm processing. This enables it to match the performance of high-end piezoelectric vibration sensors.

Applicable scenarios: precision machine tool spindles, high-speed turbine equipment, industrial robot joints, heavy construction machinery, high-speed assembly line precision equipment, rail transit vehicle equipment

Core advantages: Support for custom vibration algorithms on the chip, fault feature extraction, local completion of data preprocessing and anomaly judgment, significantly reducing the computing power pressure of the master controller; Ultra-high bandwidth adapts to high-speed equipment high-frequency resonance monitoring, ultra-large range can capture equipment violent impact vibration, meet the needs of high-end industrial precision monitoring and fault source tracing.

4. Wireless sensor monitoring nodes | low-power IoT terminals

Traditional wired vibration monitoring is cumbersome and costly to retrofit, and cannot be adapted to decentralized industrial equipment and retrofit scenarios of old equipment. The IIS3DWB series has ultra-low power consumption characteristics, which perfectly adapts to battery-powered wireless sensing terminals, and is the optimal solution for the intelligent transformation of industrial old equipment.

Typical terminal: workshop distributed vibration acquisition node, outdoor equipment monitoring terminal, HVAC monitoring module, unattended base station equipment sensing terminal

Program highlights: three-axis full-open working current is only 1.1mA, supports single burst sampling, low power sleep mode; Combined with the on-chip FIFO cache, it reduces the frequency of wireless data transmission, effectively reduces the overall power consumption of the device, realizes the free wiring and frequent charging of the device, and is suitable for long-term unattended monitoring scenarios.

5, Construction Machinery and Agricultural Machinery | Rigorous Condition Impact Vibration Monitoring

Excavators, loaders, harvesters, planters and other construction machinery and agricultural machinery are in a harsh working condition for a long time, which is bumpy, high impact and dusty. The structural components are prone to fatigue damage, loose screws and hydraulic system failure.

Landing application: monitor the vibration and impact data of mechanical arms, hydraulic components, car frames, and transmission structures, and judge the health status of equipment structures in real time; By identifying abnormal operation loads and component failures through vibration data, it can assist in intelligent operation control, extend the service life of equipment, and reduce the failure rate of heavy industry equipment.

6. Intelligent Buildings and Infrastructure | Equipment Health Inspection

It is suitable for the intelligent building and lightweight infrastructure monitoring scene, and does not require high-precision high-spectrum analysis. It focuses on low-cost, stable and reliable state perception.

Detailed scenarios: vibration monitoring of elevator operation, state inspection of central air conditioning units, monitoring of water supply and drainage pump bodies, micro-vibration monitoring of bridges and steel structure buildings, monitoring of fire equipment status

Application value: Replace manual periodic inspection, realize 24-hour unattended monitoring of building equipment, timely discover equipment noise, abnormal vibration, and operation lag problems, improve the level of intelligent operation and maintenance of buildings, and reduce infrastructure operation and maintenance costs.

7. Laboratory testing and measurement | Dynamic performance calibration testing

Relying on the high precision, high stability, and repeatable sensing characteristics, IIS3DWB can be used in small test and measurement scenarios, suitable for industrial product vibration testing, structural mechanics testing, and equipment dynamic performance calibration.

Specific uses: product anti-vibration test, structural fatigue test, small equipment impact performance detection, dynamic stability calibration of consumer electronic products, relying on the flat frequency response curve to ensure accurate and undistorted test data.

Common specifications of STMicroelectronics:

LIS2DWLTR

LSM6DSV16XTR

LSM6DSV32XTR

L9663-TR-1

LSM6DSOETR3

LSM6DSK320XTR

ISM330DHCXTR

ASM330LHHTR

SPC584B70E3EHC0X

STM32H563MIY3QTR

STM32F0316DIE1

STM32G473VCT6

STM32H7B0ZBT6

STM32L053R8T6

ST (STMicroelectronics) sensors; 3D accelerometer; Temperature sensing; ST sensor; Sensor Gyroscope

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