Pyroelectric infrared sensor PYQ 1748

Overview
This Quad-Element pyrodetector integrates four pyroelectric elements in series within a TO-5 metal housing. It belongs to the DigiPyro family and includes on-board circuitry that converts element signals into a 14-bit digital output. The PYQ 1748 is intended for mid-range ceiling sensing and features a built-in temperature diode, providing combined 2×14-bit data (pyro + temperature) transmitted via a single-wire direct link to a host microprocessor.

Features

• Integrated 14-bit digitization
• High-responsivity ceramic pyroelectric elements
• Quad elements 1×1 mm²
• 148° field of view (horizontal/vertical)
• TO-5 metal housing for high EMI immunity
• Suitable for advanced motion detection algorithms

Applications

• Mid-distance motion detection (with lens)
• Energy-saving occupancy sensing
• Intrusion alarm systems
• Ceiling-mount installations

Technical specifications

• Responsivity: 6.5 kV/W
• Noise: 3 digits (typ), 12 digits (max)
• Housing with optical window: TO-5
• Power requirement: 2.7–3.6 V / 10 µA
• Field-of-view (horiz/vert): 148°/148°
• Integrated digitization and 14-bit digital output (DigiPyro family)
• Built-in temperature diode enabling 2×14-bit output via single-wire direct link