Pyroelectric infrared sensor PYQ 1398

Overview
Excelitas' PYQ 1348 and PYQ 1398 pyroelectric detectors integrate four sensing elements arranged in a geometric square and electrically connected in series to form a single analog output via an integrated FET in source-follower configuration. Two window options (rectangular or square) and different element spacings are available. With appropriate lens or mirror optics these detectors are intended for ceiling-mounted motion-detection devices. The PYQ 1348 is also offered with smaller 0.8 × 0.8 mm² elements for compact lenses and short detection distances.

Features

• TO-5 metal housing for EMI shielding
• Ceramic pyroelectric sensing elements with high responsivity
• Quad configuration with 1 × 1 mm² elements (PYQ 1348 small elements: 0.8 × 0.8 mm²)
• Field-of-view: PYQ 1348 — 124° (140° for small elements); PYQ 1398 — 103°
• Integrated FET in source-follower configuration
• Integrated EMI filtering stage

Applications

• Mid/short-range motion detection (with lens)
• Energy-saving lighting control
• Intrusion detection systems
• Ceiling-mounted presence sensors

Technical specifications

• Responsivity: PYQ 1398: 6.2 kV/W (typical); PYQ 1348: 6.5 kV/W (typical); PYQ 1348 small elements: 9.1 kV/W (typical)
• Noise: PYQ 1398: 40 µVpp (typical) / 100 µVpp (max); PYQ 1348: 40 µVpp (typical) / 100 µVpp (max); PYQ 1348 small elements: 60 µVpp (typical) / 150 µVpp (max)
• Operating voltage: 2–12 V for all versions
• Housing with optical window: TO-5 metal package
• Field-of-view (horiz/vert): PYQ 1398: 103°/100°; PYQ 1348: 124°/124°; PYQ 1348 small elements: 140°/140°
• Electrical: four sensing elements connected in series to one FET forming a single analog output
• Mechanical: four sensing elements arranged in a square; available window shapes: rectangular or square; alternative geometrical placements on request