Overview
The product is a type of intelligent PIR sensor which integrates digital circuit and sensitive element in a hermetically sealed package. It interfaces directly with up two conventional PIR sensors via a high impedance differential input . The PIR signal is converted to a digital value on chip. A REL output indicates whenever the PIR signal is above the selected threshold . The parameters for timing is set by connecting the corresponding inputs to DC voltages . All signal processing is performed digitally.
Feature
Digital signal processing, no dirft and aging
High power supply rejection ratio, anti-radio frequency interference(mobile phone, WiFi ,etc.)
A secon-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.Technical data
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 | 80 | μV | |||
Detective Wavelength | λ | 5 | 14 | um | ||
Outputs REL | ||||||
Output current low | 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 |
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