Pyroelectric infrared sensor PYQ 2498

Product description
The Excelitas PYQ 2498 pyrodetector provides two pairs of pyroelectric elements arranged in a geometric square. Two elements per pair are electrically connected in series; each pair drives an integrated FET in source-follower configuration to produce one analog output, yielding two independent analog signals. The device is supplied in a TO-5 metal housing with a rectangular optical window.

Detailed information
This quad pyrodetector integrates four high-responsivity ceramic pyroelectric elements grouped into two closely spaced pairs. Each pair is connected to a dedicated FET configured as a source follower to deliver a stable analog output. An internal RC filter stage improves EMI immunity. The compact geometry and the TO-5 rectangular window make the device suitable for lens-based motion sensing and wall-mounted detector modules.

Features

• TO-5 metal housing for EMI shielding
• High-responsivity ceramic pyroelectric elements
• Quad detector with 1.0 × 1.4 mm2 elements
• 110° field of view
• Integrated FET in source-follower configuration
• Integrated EMI filtering stage

Applications

• Long- and mid-range motion detection (with appropriate lens)
• Energy-saving systems (lighting control, smart building)
• Intrusion alarm systems
• Wall-mounted detector designs
• Enhanced pet-immunity solutions (with suitable lens)

Technical specifications

• Responsivity: 4.5 kV/W (typical)
• Noise: 30 µVpp (typical) / 75 µVpp (max)
• Supply: 2–12 V
• Housing with optical window: TO-5
• Field of view (H × V): 110° × 87°