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PIR
High precision IC with PWM output passively receive and detect infrared radiation. It is widely used for electronic anti-theft, human body detector and smart lighting.
Program overview
Passive pyroelectric infrared detectors are widely used in electronic anti-theft, human body detectors, and intelligent lighting. However, PIR signal processing is not simple. It requires developers to invest a lot of time and effort. SDIC provides the SD4000 IC series to reduce the production time and cost. It has high-precision ADC and PWM output for PIR signal acquisition and processing.
Program advantages

  • Industry standard, good stability

  • Built-in amplifier, high-precision algorithm unit, adaptive to ambient environment

  • Long sensing range, Adjustable sensitivity for convenient usage

  • The output delay time of control signal can be adjusted

  • Built-in masking time, effectively inhibits repetitive malfunction

  • Multi-channel analog input and multi-channel digital output

  • Connect external photo-transistor or photo-resistor to inhibit day light working

Industry standard, good stability

Built-in amplifier, high-precision algorithm unit, adaptive to ambient environment

Long sensing range, Adjustable sensitivity for convenient usage

The output delay time of control signal can be adjusted

Built-in masking time, effectively inhibits repetitive malfunction

Multi-channel analog input and multi-channel digital output

Connect external photo-transistor or photo-resistor to inhibit day light working

Features

  • High precision ADC, 20.6bits ENOB at 250sps. It can be set to 2 differential or 4 single-ended inputs (to VSS)

  • 8-bit RISC low power MCU, 49 instructions and 6 stack levels. The typical MCU current consumption is: 700uA at 3V and 2MHz operating clock rate, 2uA at standby and 32kHz clock rate, and 1uA at sleep 8k Bytes OTP, 256 Bytes SRAM

  • OTP with low programming voltage can replace external EEPROM

  • Internal 4MHz and 32kHz RC oscillator. No external clock source is needed

  • 1 channel 8bits PWM0 output

  • Watch Dog Timer

  • All I/O have Schmidt trigger inputs and pull-up resistors

  • Flexible battery voltage detection is 2.4~3.3V

  • Low voltage detection and power on reset circuit

  • Operating voltage range: 2.4V ~ 3.6V

  • Operating temperature range: -40℃~ 85℃

Application diagram
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