SCA3401-D01 | Murata (Murata) | Industrial-grade ultra-low drift three-axis MEMS accelerometer, Relying on capacitive 3D-MEMS technology, the zero bias drift control of the whole life cycle is controlled to the leading level in the industry, taking into account low noise, wide temperature adaptability, built-in self-diagnosis, suitable for unattended, long-term continuous work of high-precision measurement system.

SCA3401-D01 | Murata (Murata) | Industrial-grade ultra-low drift three-axis MEMS accelerometer, Relying on capacitive 3D-MEMS technology, the zero bias drift control of the whole life cycle is controlled to the leading level in the industry, taking into account low noise, wide temperature adaptability, built-in self-diagnosis, suitable for unattended, long-term continuous work of high-precision measurement system.

Basic specifications and package information

1. Brand model: Murata (Murata) SCA3401-D01

2.Package: 12-pin pre-formed plastic encapsulation SMD chip package, size **8.6 × 7.6 × 3.3mm**, suitable for standard SMT reflow production Murata Man...

3. Power supply voltage: 3.0V-3.6V, typical 3.3V system power supply, suitable for industrial MCU platform

4. Measurement axis: X/Y/Z three-axis acceleration detection

5.Operating temperature: industrial wide temperature range -40 ℃ ~ + 85 ℃, suitable for outdoor and field equipment environment

6 * Packaging: roll-belt carrying belt packaging, supports large-scale chip-on-board; Compliant with RoHS, ELV environmental directives Murata Man...

7. Start-up characteristics: approximately 3ms on-power start-up time, 15ms output stabilization time, data output rate up to 2000 Hz

II. Internal hardware architecture

The SCA3400-D01 is integrated by **3D-MEMS sensitive core + mixed-signal ASIC dedicated processing chip**:

1. Capacitive MEMS sensing single*: three-dimensional capacitance detection structure, converting acceleration changes into capacitance signal, mechanical reinforcement design, anti-continuous vibration impact; The inter-axial orthogonal compensation is completed at the factory, which saves the workload of external calibration.

2. ASIC signal processing unit: built-in signal amplification, AD conversion, two sets of digital low-pass filters, register management, self-diagnosis detection logic.

3. Digital output unit, hardware SPI interface, supports SafeSPI2.0 protocol, directly outputs quantized digital acceleration, no need for external analog amplifier and ADC, reduces the cost of peripheral circuit BOM.

4. Auxiliary function module: built-in on-chip temperature sensor, can synchronously read chip temperature, convenient for the system to make temperature drift compensation; Supports SYNC synchronous input, data ready signal output, and multiple sensors can be collected in time synchronization.

Three, two major switchable measurement working modes

The chip hardware is equipped with two independent filtering parameters, and the software can switch directly. One set is for static inclination, and the other set is for dynamic vibration acquisition. No external filtering circuit is needed.

1. Mode 1: High-precision inclination mode

- Range: ±1.2g

- Built-in low-pass filter: 10Hz

- Suitable for: static tilt, platform leveling, static deformation of buildings, and suppressing high-frequency vibration interference.

2. Mode 2: Vibration dynamic acquisition mode

- Range: ±2.4g

- Built-in low-pass filter: 80Hz

- Suitable for: equipment vibration detection, dynamic posture capture, capturing high-frequency vibration signals.

The quantization resolution can reach **15000LSB/g**, which can capture very small acceleration changes and realize micro-deformation detection Murata Man...。

IV. Core performance indicators (core competitiveness of products)

1. Full life cycle zero drift (industry core selling point)

- X, Y axis typical ≤ **0.5mg**;Typical Z-axis ≤ **2mg** Murata Man...。

The zero offset of the long-term years of work is very small, which greatly reduces the frequency of field system calibration, and is very suitable for unattended long-term monitoring projects.

2. Temperature zero drift

X/Y ≤ 2mg, Z ≤ 3mg, the output offset can be controlled in a wide temperature range.

3.The noise density is as low as 20 μg/√ Hz**, ultra-low noise, weak vibration, small tilt signal can be clearly distinguished, will not be overwhelmed by noise Murata Man...。

4.Long-term drift of sensitivity: X/Y axis ± 0.02%, Z axis ± 02%, excellent stability of sensitivity Murata Man...。

V. Interface, communication and self-check security mechanism

Communication interface

Using standard SPI digital interface, 3.3V level; Supports SafeSPI 2. 0, with communication error detection to prevent bus interference from causing error data reading; Supports multi-sensor synchronous trigger acquisition, suitable for multi-point distributed monitoring system.

Advanced self-diagnostic function

Built-in more than 200 real-time self-checking logic, continuously monitoring the MEMS chip body, ASIC circuit, power supply, register state, if there is a chip fault, signal anomaly, register mark fault bit, MCU can read and identify sensor failure, avoid collecting wrong data, greatly improve the reliability of the whole monitoring system, this is the key ability of industrial monitoring scene.

At the same time, it has over-temperature monitoring, voltage anomaly detection, and feedback the fault status to the master controller when the chip works abnormally.

VI. Main application areas

The SCA3400-D01 is designed for industrial high-precision long-term monitoring and is not intended for consumer mobile phone bracelets. The key scenarios are as follows: Murata Man...

1. Structural Health Monitoring SHM (main application)

Bridge, tower, wind turbine tower shell, building dam deformation and tilt monitoring; The geological landslide monitoring of the foundation pit and slope requires the equipment to be operated outdoors for a long time without human intervention, and it has extremely high requirements for long-term zero drift.

2. Construction machinery and precision leveling

Automatic leveling of cranes and aerial work platforms; Surveying instruments, laser level; Construction machinery posture perception.

3. Industrial equipment vibration monitoring

Vibration state monitoring of fans, motors, air compressors, and CNC machines to predict mechanical failures in advance.

4. Inertial Measurement Unit (IMU)

Combined with gyroscope, it forms an industrial-grade inertial navigation system, which is used for engineering machinery positioning, AGV, and positioning guidance system.

5. Other

Precision gimbal attitude, heavy equipment attitude monitoring, large antenna horizontal calibration.

VII. Core advantages of the product

1. Excellent long-term stability: extremely low life drift, no need for frequent on-site calibration, reduced maintenance costs in the later stage, suitable for continuous operation for several years.

2. Dual-mode hardware filtering, one set of hardware can meet both static inclination measurement and dynamic vibration acquisition, one set of sensors can adapt to two measurement needs.

3. A complete self-diagnosis system, sensors themselves can report faults, preventing the system from misjudging based on incorrect data, which is crucial for safety monitoring systems.

4. Factory axle compensation, reduce customer production line calibration workload, shorten product development cycle.

5. Anti-vibration reinforcement MEMS structure, stable performance under continuous vibration in industrial environment, not easily affected by mechanical disturbance.

VIII. Selection Reference: Suitable and Inappropriate Selection Scenarios

✅Recommended usage scenarios

1. Tilt and deformation monitoring projects that need to run continuously for a long time and are inconvenient for frequent on-site calibration;

2. Static tilt + equipment vibration signals need to be collected simultaneously;

3. Industrial outdoor wide temperature environment, with requirements for measurement reliability and fault identification;

4. Build a distributed multi-point synchronous acquisition system.

For technical and business consulting, please contact: 18277896808