Pyroelectric infrared sensor PYD 1794

Product Overview
The PYD 1794 dual-element DigiPyro detector integrates two pyroelectric elements in series within a low-profile TO‑39 metal housing with an optical window. Internal signal conditioning converts the element responses to a 14‑bit digital output per element; an internal diode provides a temperature‑related output yielding a combined 14+14 bit data stream. The compact package and integrated digitization simplify interfacing for motion‑detection systems.

Features

• Integrated digitization
• High‑responsivity ceramic pyroelectric elements
• Dual detector with 2 × 1 mm² elements
• 115° field of view
• Low‑profile TO‑39 metal housing for high EMI immunity
• Suitable for advanced motion detection algorithms

Applications

• Long‑distance motion detection (with lens)
• Energy‑saving/occupancy sensing
• Intrusion alarm systems
• Horizontal mounting applications

Specifications
Responsivity: 4.2 kV/W (typical)
Noise: 3 digits (typ), 12 digits (max)
Operation requirements: 2.7–3.6 V / 10 µA
Housing with optical window: TO‑39
Field‑of‑view (horiz/vert): 115°/115°

characteristics / technical specifications

• Responsivity: 4.2 kV/W (typical)
• Noise: 3 digits (typ), 12 digits (max)
• Operation requirements: 2.7–3.6 V / 10 µA
• Housing: TO‑39 (with optical window)
• Field‑of‑view: 115° horizontal / 115° vertical
• Elements: dual 2 × 1 mm² ceramic pyroelectric elements
• Output: integrated 14‑bit digital output per element (14+14 bit including temperature diode)
• Housing characteristic: low‑profile TO‑39 metal housing for high EMI immunity