Overview
The product is a type of intelligent PIR sensor which integrates digital circuit and sensitivity element in a hermetically sealed package. It interfaces directly with up two conventional PIR sensor 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 siganal processing is performed digitally.
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.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 | 2.7 | 3 | 3.3 | V | |
Supply current | IDD | 9 | 12 | 15 | μA | |
Sensitivity threshold | VSENS | 100 | 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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