This schematic block features the ZSBG323671, a high-sensitivity dual-element passive infrared (PIR) sensor from Zilog’s ZMOTION® series. It uses two matched pyroelectric elements configured in a balanced (series-opposed) layout to improve noise suppression and reduce false triggers, especially in environments with fluctuating infrared backgrounds.
Housed in a rugged metal TO-5 can with a top-mounted lens, this breakout-style module exposes three leads (signal, source, ground) for easy integration into motion-detector circuits. The sensor is designed for compatibility with dedicated PIR amplifier or MCU front ends, making it ideal for security, lighting, HVAC, and embedded motion-detection systems.
Key Features:
- Dual pyroelectric sensing elements (1.0 mm × 2.3 mm, spaced 1.0 mm)
- Balanced differential (series-opposed) configuration for noise rejection
- Built-in EMI compensation for robustness in electrically noisy environments
- Recommended supply voltage: 3 V to 10 V
- Output signal (AC) with typical peak-to-peak amplitude of ~3.3 V
- Noise output: up to ~250 mV p‑p (typical ~70 mV p‑p)
- Analog output requires amplification / filtering (chopper-based recommended)
- Broad field of view: ~134° × 120°
- Spectral sensitivity: optimized for 8–13 µm IR wavelengths
- Operating temperature: –40 °C to +70 °C
Typical Applications:
- Security motion detectors (indoor & outdoor)
- Video doorbell and IP camera motion sensing
- Wall-mounted lighting and HVAC control
- Battery-powered or mains-powered presence detection
- Embedded occupancy sensors for smart buildings
By integrating this Quickboards block, engineers can build reliable motion-detection systems with high false-alarm immunity, reduce design complexity by using a proven dual-element PIR architecture, and leverage a seasoned, production-ready component for both consumer and industrial motion applications.
