Overview
NS412 is a type of PIR sensor which integrates a digital control circuit and a human detection sensor in an electromagenetic shielding housing.The human body detection sensor couples the sensed human movement signal to the digital intelligent integrated circuit chip through a very high impedance differential input circuit.The digital intelligent integrated circuit converts the signal into digital signal, and when the PIR signal exceeds the selected digital threshold, there will be a delayed REL level output. The time parameter is set through the resistance to control the continuous working delay time of the electrical appliance. All the signal processing is done on one chip.
Feature
★ Digital signal processing,no drift and aging
★ High power supply rejection ratio, anti-radio frequency
interference(mobile phone,WiFi,etc.)
★ A second-order Butterworth bandpass filter with built-in
infrared sensor to shield input interference at other
frequencies
★ Ontime adjustable
★ Good stability and effective suppression of repeated
malfunctions
★ Low power consumption and simple application circuit
Datasheet
1.Absolute Maximum Ratings
Electrical characteristics(beyond those listed below may cause permanent damage to the device. Exposure to absolute maximum ratings may affect the device reliability.
Parameter | Symbol | Min | Max | Unit | Remarks |
Operating Temp | TST | -30 | 70 | ℃ | |
Current into any pin | Into | -100 | 100 | mA | |
Storage Temp | TST | -40 | 80 | ℃ |
2. Operating Conditions (T=25°C, Vdd=3V，unless stated otherwise)
Parameter | Symbol | Min | Type | Max | Unit | Remarks |
Regular voltage | VDD | 2.2 | 3 | 3.7 | V | |
Supply current | IDD | 9 | 9.5 | 11 | μA | |
Sensitivity threshold | VSENS | 90 | μV | |||
Detective Wavelength | λ | 5 | 14 | um | ||
Outputs REL | ||||||
IOL | 10 | mA | VOL<1V | |||
Output current high | IOH | -10 | mA | VOH>(VDD-1V) | ||
Low REL output locking time | TOL | 2 | s | Non-adjustable | ||
High REL output delay time | TOH | 2 | 3600 | s | ||
Inputs ONTIME | ||||||
Input voltage range | 0 | VDD1/2 | V | Adjustable between 0V and VDD/2 | ||
Input leakage current | -1 | 1 | μA | |||
Oscillator and Filter | ||||||
LPF cutoff frequency | 7 | Hz | ||||
HPF cutoff frequency | 0.44 | Hz | ||||
On chip oscillator frequency | FCLK | 64 | kHz | |||
Tel.: +86-755-82594732
E-mail: sales.sz@nysenba.com
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