AC-SMA High Precision Single Axis MEMS Accelerometer ±5g~±50g 5V Supply SPI Digital / Differential Analog Output
The AC-SMA-XXD series accelerometer is a single-axis capacitive MEMS accelerometer, consisting of a fully silicon MEMS sensing structure and a low-power signal processing ASIC composition. AC-SMA-XXD is powered by a single power supply (5V) and features low typical power consumption (11mA). Its output is either a digital signal in SPI protocol or a fully differential analog signal (common mode voltage at 2.5V), and the analog output voltage ranges from 0.5V to 4.5V.
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1Product Series and Parameters
| Model code | AC-SMA-02D | AC-SMA-05D | AC-SMA-10D | AC-SMA-15D | AC-SMA-20D | AC-SMA-30D | AC-SMA-50D | Unit |
| Axial | X | X | X | X | X | X | X | (parallel to the device surface) |
| Range | ±2 | ±5 | ±10 | ±15 | ±20 | ±30 | ±50 | g |
| Bandwidth (adjustable) | >120 | >120 | >120 | >120 | >120 | >120 | >120 | Hz |
| Zero-bias stability (1s, 1σ) | <20 | <20 | <50 | <50 | <50 | <100 | <200 | μg |
| Monthly repeatability | <100 | <100 | <300 | <300 | <300 | <300 | <300 | μg |
| Zero-bias temperature coefficient | <10 | <10 | <30 | <30 | <30 | <50 | <100 | μg/℃ |
| Zero-bias temperature hysteresis | 2 | 2 | 3 | 3 | 3 | 4 | 4 | mg |
| Scale nonlinearity | 1000 | 1000 | 2000 | 2000 | 2000 | 3000 | 3000 | ppm |
| Monthly repeatability | <100 | <100 | <100 | <100 | <100 | <100 | <100 | ppm |
| Scaling temperature coefficient | <5 | <5 | <5 | <10 | <10 | <10 | <10 | ppm/℃ |
| Scale factor | 3750000±37500 | 1500000±15000 | 700000±7000 | 500000±5000 | 350000±3500 | 250000±2500 | 150000±1500 | LSB/g |
| Startup time | <1 | <1 | <1 | <1 | <1 | <1 | <1 | s |
| Sampling frequency | 25K | 25K | 25K | 25K | 25K | 25K | 25K | Hz |
| Impact | The overload-resistant model has passed the 27000g overload test by users | g | ||||||
| Vibration rectification error (6grms) | / | / | <0.15 | <0.15 | <0.15 | <0.15 | <0.15 | mg/grms |
| Operating Temperature | -55～125 | -55～125 | -55～125 | -55～125 | -55～125 | -55～125 | -55～125 | ℃ |
| Power supply voltage | 5.0±0.2 | 5.0±0.2 | 5.0±0.2 | 5.0±0.2 | 5.0±0.2 | 5.0±0.2 | 5.0±0.2 | V |
| Current (typical value) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | mA |
| Communication interface | SPI | SPI | SPI | SPI | SPI | SPI | SPI | |
| Output format | Analog/Digital | Analog/Digital | Analog/Digital | Analog/Digital | Analog/Digital | Analog/Digital | Analog/Digital | |
| Notes: | ||||||||
| 1. Long-term repeatability: Accelerometers with a range of 32 ± 50g have undergone long-term repeatability testing, and test data spanning 1.5 years is available. The proportion of accelerometers with zero-bias repeatability < 0.2mg is 31%, the proportion with zero-bias repeatability < 0.5mg is 75%, the proportion with zero-bias repeatability < 1.2mg is 100%, the proportion of accelerometers with scale factor repeatability < 100ppm is 93.7%, and the proportion with scale factor repeatability < 200ppm is 100%. | ||||||||
| 2. The smaller the measurement range, the higher the accuracy. For example, products with a ±2g measurement range have the best zero-bias stability indicator of 3μg, and also exhibit better long-term repeatability. | ||||||||
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