Overview
Senba Pyroelectric Infrared Sensors with high sensitivity, low noise and reliable performance. We have our own research and development department, with international technology and Hybrid IC technique expertise developed more than 15 years. The goods come standard with enhanced immunity to RFI (Radio Frequency Interference) and 2.4G high frequency interference. Senba PIR sensor suppport delay time, sensitivity adjustable, lighting adjustable.
Features
Schmidt REL output
Low voltage, low power consumption, instantaneous settling after power up
Technical Data
1.Maximum Ratings
Characteristics | Symbol | Min. Value | Max. Value | Unit | Remarks |
Supply Voltage | VDD | -0.3 | 3.6 | V | |
Working Temperature | TST | -20 | 85 | ℃ | |
Max.current for pin | Into | -100 | 100 | mA | |
Storage Temperature | TST | -40 | 125 | ℃ |
2.Working Conditions (T=25°C, Vdd=3V，Except other requirements)
Characteristics | Symbol | Min. | Type | Max. | Unit | Remarks | |
Supply Voltage | VDD | 2.0 | 3 | 3.3 | V | IR=0.5mA | |
Working Current | IDD | 9 | 9.5 | 11 | μA | ||
Sensitivity | VSENS | 90 | 2000 | μV | |||
Output REL | |||||||
Output Low Current | IOL | 10 | mA | VOL<1V | |||
Output High Current | IOH | -10 | mA | VOL>(VDD-1V) | |||
Lock time | TOL | 2 | s | ||||
On-time | TOH | 2 | 4793 | s | |||
SENS/ONTIME | |||||||
Input voltage | 0 | VDD | V | 0V to VDD/2 | |||
Input Bias Current | -1 | 1 | μA | ||||
OEN | |||||||
Input Low Voltage | VIL | 0.8V-1.2VEnable area | 0.8 | Vdd | |||
Input High Voltage | VIH | 1.2 | Vdd | ||||
Input Current | II | -1 | 1 | μA | VSS<VIN<VDD | ||
Oscillator & Filter | |||||||
Low pass filter cut-off frequency | 7 | Hz | |||||
High pass filter cut-off frequency | 0.44 | Hz | |||||
Oscillator frequency on Chip | FCLK | 64 | kHz | ||||
Interior Block Diagram |
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Applications
1. Household or other appliances
start air conditioning or turn on the lights.
2. Lighting appliances
Toys
Digital photo frame
TV, Refrigerator, Air-conditioner
FAQ
1.What can trigger a PIR sensor?
Five Causes of PIR False Alarms. The first cause of PIR false alarms is low or unstable voltage at the detector. Test to make sure the voltage at each PIR is above 13VDC and stable. The second cause of false alarms is sudden infrared movement / heat changes in view of the detector.
2.How do PIR sensors work?
When the sensor is idle, both slots detect the same amount of IR, the ambient amount radiated from the room or walls or outdoors. When a warm body like a human or animal passes by, it first intercepts one half of the PIR sensor, which causes a positive differential change between the two halves.
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