Product Description
The SC7A20H is a high-precision, digital three-axis accelerometer sensor chip with enhanced functionality, lower power consumption, and a smaller footprint for more accurate measurements. It communicates with MCUs via IC/SPI interfaces, providing acceleration data through interrupts or polling. The INT1 and INT2 interrupt pins offer multiple automatic internal detection interrupt signals suitable for various motion detection scenarios, including 6D/4D orientation detection, free-fall detection, sleep and wake-up detection, and single/double-tap detection. The chip features a built-in high-precision calibration module for precise compensation of sensor offset and gain errors. It offers four adjustable full-scale measurement ranges (2G, 4G, 8G, 16G) and selectable output data rates between 1.56Hz and 4.27kHz. A self-test function allows for system testing without complex turntable setups.
Product Attributes
- Brand: (Silan Microelectronics)
- Origin: (Hangzhou Silan Microelectronics Co., Ltd.)
- Certifications: (Halogen-free)
- Packaging: (Tape & Reel)
Technical Specifications
| Parameter | Symbol | Test Condition | Min | Typical | Max | Unit |
| General | ||||||
| Supply Voltage | VDD | 1.71 | 2.5 | 3.6 | V | |
| IO Supply Voltage | VDDIO | 1.71 | VDD+0.1 | V | ||
| Supply Current | IDD | TA=25C, ODR=100Hz | 16 | A | ||
| Low Power Current | IDDLP | TA=25C, ODR=100Hz | 8.5 | A | ||
| Power-Down Current | IDDPdn | TA=25C | 0.5 | A | ||
| Operating Temperature | TOPR | Circuit not damaged | -40 | +85 | C | |
| Storage Temperature | TSTG | Circuit not damaged | -55 | +150 | C | |
| Mechanical Parameters | ||||||
| Full-Scale Measurement Range | FS0 | FS=0 | 2.0 | g | ||
| FS1 | FS=1 | 4.0 | g | |||
| FS2 | FS=2 | 8.0 | g | |||
| FS3 | FS=3 | 16.0 | g | |||
| Sensitivity | So0 | FS=0 | 1 | mg/digit | ||
| So1 | FS=1 | 2 | mg/digit | |||
| So2 | FS=2 | 4 | mg/digit | |||
| So3 | FS=3 | 8 | mg/digit | |||
| Zero-Offset (Factory) | TyOff0 | FS=1 | 50 | 80 | mg | |
| Zero-Offset (After Soldering) | TyOff1 | FS=1 | 90 | 120 | mg | |
| Temperature Drift of Offset | TCOff | Max deviation from 25C | 0.5 | mg/C | ||
| Self-Test Output | Vst1 | FS=0, X-axis | 320 | mg | ||
| Vst2 | FS=0, Y-axis | 320 | mg | |||
| Vst3 | FS=0, Z-axis | 430 | mg | |||
| System Bandwidth | BW | ODR/2 | Hz | |||
| Electrical Parameters | ||||||
| Digital High Level Input Voltage | VIH | 0.8* VDDIO | V | |||
| Digital Low Level Input Voltage | VIL | 0.2* VDDIO | V | |||
| High Level Output Voltage | VOH | 0.9* VDDIO | V | |||
| Low Level Output Voltage | VOL | 0.1* VDDIO | V | |||
| Output Data Rate | ODR0 | ODR=1.56Hz | 1.56 | Hz | ||
| ODR1 | ODR=12.5Hz | 12.5 | Hz | |||
| ODR2 | ODR=25Hz | 25 | Hz | |||
| ODR3 | ODR=50Hz | 50 | Hz | |||
| ODR4 | ODR=100Hz | 100 | Hz | |||
| ODR5 | ODR=200Hz | 200 | Hz | |||
| ODR6 | ODR=400Hz | 400 | Hz | |||
| ODR7 | ODR=800Hz | 800 | Hz | |||
| ODR8 | ODR=1.48kHz | 1480 | Hz | |||
| ODR9 | ODR=2.66kHz | 2660 | Hz | |||
| ODR10 | ODR=4.434kHz | 4434 | Hz | |||
| Enable Time | Ton | ODR=100Hz | 1 | ms | ||
| IC Interface Parameters | ||||||
| SCL Clock Frequency | f(SCL) | IC Standard Mode | 0 | 100 | kHz | |
| IC Fast Mode | 0 | 400 | kHz | |||
| SCL Clock Low Time | tw(SCLL) | IC Standard Mode | 4.7 | s | ||
| IC Fast Mode | 1.3 | s | ||||
| SDA Setup Time | tsu(SDA) | IC Standard Mode | 250 | ns | ||
| IC Fast Mode | 100 | ns | ||||
| SDA Hold Time | th(SDA) | IC Standard Mode | 0.01 | 3.45 | s | |
| IC Fast Mode | 0.01 | 0.9 | s | |||
| SPI Interface Parameters | ||||||
| SPI Clock Period | Tc(SPC) | 100 | ns | |||
| SPI Clock Frequency | Fc(SPC) | 10 | MHz | |||
| CS Setup Time | Tsu(CS) | 5 | ns | |||
| CS Hold Time | Th(CS) | 8 | ns | |||
| SDI Input Setup Time | Tsu(SI) | 5 | ns | |||
| SDI Input Hold Time | Th(SI) | 15 | ns | |||
| SDO Valid Output Time | Tv(SO) | 50 | ns | |||
| SDO Output Hold Time | Th(SO) | 6 | ns | |||
2509260919_Hangzhou-Silan-Microelectronics-SC7A20HTR_C19274408.pdf
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