PROD Model:BS412
Window Size:3*4mm
Output Signal:High and low level output
Sensing Distance:12M(Lens SB-F-02)
See lens selection for different distances
Sensing Angle:120°（horizontal direction）
Working Voltage: 2.2-3.7V
Static Power Consumption: <12uA
The BS312 is a digital pyroelectric infrared (PIR) motion sensor developed by Senba Sensing. The BS312 is designed for human body motion detection and provides a stable digital output signal. The BS312 delivers reliable sensing performance with good resistance to interference in typical indoor environments. The BS312 is widely used in motion-activated lighting, security alarm systems, smart home products, sensor lamps, and other automatic control applications.
Power supply voltage range 1.6-5.5V
Programmable detection standard and working mode
Digital signal processing
Ultral low power consumption
Power supply voltage measurement
Temperature measurement
Fast and stable power-on
1.Technical data
| Description | Symbol | Min | Typical | Max | Unit | Remarks |
| VDD voltage | VDD | -0.3 | 5.5 | V | 25℃ | |
| Analog pin voltage | -0.3 | VDD+0.3 | V | 25℃ | ||
| Digital pin voltage | -0.3 | VDD+0.3 | V | 25℃ | ||
| Storage temperature | -30 | 80 | ℃ |
2.Operating Conditions ( TAMB = +25℃ Typical VDD=3V)
| Description | Conditions | Symbol | Min | Typical | Max | Unit | ||||||
| Operating temperature | ||||||||||||
| Operating temperature range | -20 | +70 | ℃ | |||||||||
| Operating Voltage | ||||||||||||
| Supply voltage | VDD | 2.2 | 3.7 | V | ||||||||
| Supply current | ||||||||||||
| Supply current, VPIR regulator on | VDD=3V, no load | IDD1 | 6 | 8 | µA | |||||||
| Supply current, VPIR regulator off | VDD=3V, no load | IDD | 3 | 5 | µA | |||||||
| Input parameter SERIN | ||||||||||||
| Input low voltage | VIL | 0.2 | VDD | |||||||||
| Input high voltage | VIH | 0.8 | VDD | |||||||||
| Input Current | VSS<VIN<VDD | IIN | -1 | 1 | µA | |||||||
| Digital clock low time | tL | 200 | ns | |||||||||
| Digital clock high time | tH | 200 | ns | |||||||||
| Data Bit Write Time | tBW | 2/FCLK | 5/FCLK | µs | ||||||||
| Write timeout | tWL | 16/FCLK | µs | |||||||||
| Data input and output pins INT/DOCI | ||||||||||||
| Input low voltage | VIL | 0.2 | VDD | |||||||||
| Input high voltage | VIH | 0.8 | VDD | |||||||||
| Output current high | VOL>(VDD-1V) | IOH | -200 | µA | ||||||||
| Output current low | VOL<1V | IOL | 200 | µA | ||||||||
| Input capacitance | 5 | pF | ||||||||||
| Force read setup time | TFR | 2/FCLK | ||||||||||
| Interrupt clear time | tCL | 2/FCLK | ||||||||||
| Digital clock low time | tL | 200 | tRA | ns | ||||||||
| Digital clock high time | tH | 200 | ns | |||||||||
| Read timeout | tRA | 4/F | µs | |||||||||
| Description | Conditions | Symbol | Min | Typical | Max | Unit | ||||||
| Supply voltage measurement | ||||||||||||
| Resolution | 590 | 650 | 720 | µV/count | ||||||||
| ADC output range | 2^13 | 2^14-511 | Counts | |||||||||
| Temperature measurement (requires single point calibration) | ||||||||||||
| Resolution | 80 | Counts/K | ||||||||||
| ADC output range | 511 | 2^14-511 | Counts | |||||||||
| Value at 300K | 6700 | 8200 | 9900 | Counts | ||||||||
| Oscillator and Filter | ||||||||||||
| Filter cutoff frequency | FCLK * 1.41 / 2048 / PI | Hz | ||||||||||
| HPF cutoff frequency | FCLK /16 * 1.41 / 2048 / PI | Hz | ||||||||||
| On-chip oscillator frequency | FOSC | 56 | 64 | 74 | kHz | |||||||
| System clock | FCLK | FOSC/2 | ||||||||||
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