Overview
Digital PIR sensor SMD337, is an integrated design of sensitive element and signal processing chip, packaged sensitive element and IC chip into sensor shield. Sensitive element transfer the human movement signal to high-precision digital chip for data processing. Then the sensor gives digital signal for easy using.
Key Features
- High-precision AD signal process
- Differential signal input mode, anti-interference ability
- Sensitivity, delay time, and light adjustment function
- Enable pin controls the sensor output
- Wide voltage power supply(1.5~4.5V) and power consumption
- Digital TTL signal output
Applications
- Security product
- Human body induction toys
- Human body induction lamps, and switches
- Industrial automation control
- Smart home
- IOT terminals
- Intelligent appliance
Technical Specifications
| Parameter | Symbol | Min | Typical | Max | Unit | Note |
| Working condition | ||||||
| Voltage | VDD | 1.5 | 3.0 | 4.5 | V | Power supply mode |
| Current | IDD | 10 | uA | 10uA @3V@25°C | ||
| Sensitivity | VSENS | 104 | uV | |||
| Temperature | WST | -25 | 85 | °C | ||
| ONTIME&SENS&OEN | ||||||
| SENS, ONTIME Input | 0 | VDD | ||||
| SENS, ONTIME Input Current | 20 | nA | Pull-down current | |||
| OEN Input Low LEL | VIL_OEN | 0.6 | V | |||
| OEN Input High LEL | VIH_OEN | 1.2 | V | |||
| Output Pin(REL) | ||||||
| Output drive current | IREL | -5 | 5 | mA | ||
| Block time | 2.0 | S | ||||
| Delay time | ONTIME | 1 | 3600 | S | 16 levels of adjustment | |
| Oscillators and filters | ||||||
| Low filter cut-off frequency | 7 | Hz | ||||
| High filter cut-off frequency | 0.4 | Hz | ||||
| Chip oscillator frequency | FCLK | 32 | KHz | |||
| Chip oscillator error | FCLK_Err | -1000 | 1000 | Ppm/K | -20~80°C |
