Excelitas Dual-Element DigiPyro Detector Series (PYD 1788/PYD 1798)
Excelitas PYD 1788/PYD 1798 Dual-Element DigiPyro Detector schematic
PART/ PYD 1788; PYD 1798

PYD 1788, PYD 1798 Dual-Element DigiPyros

The NEWLY IMPROVED PYD 1798 is now re-engineered for improved energy efficiency of a mere 1.8V at 5µA power requirement, making it an ideal motion detection sensor for extended service life in mobile and remote battery-operated devices. Both of these Excelitas Dual-Element Pyrodetectors feature two elements in series connection in TO-5 Metal Housing with optical window options. This Pyrodetector Series is part of the DigiPyro® family that feature internal integrated circuitry to convert the element signals into a 14-bit digital output.

This DigiPyro® Detector Series in TO-5 housing includes Dual-Element types with different window sizes. The element configurations are identical, along with the internal electronic circuits.

The PYD 1788 has the standard size window for economy and mid-range sensing, while PYD 1798 has an enlarged window enabling broader fields-of-view. Both the PYD 1788 and PYD 1798 models include a built-in temperature diode which provides output related to the Pyro internal temperature. This makes the output signal into a 14 +14 bit signal, communicated in one digital bit stream of 2x14-bit output via a single wire “Direct Link” connection to a suitable host microprocessor.

Features

  • Integrated digitization
  • High-responsivity ceramic pyroelectric elements
  • Dual detector with (02) 1mm2 elements
  • 110° Field-of-view
  • TO-5 metal housing for high EMI immunity
  • Best for advanced motion detection algorithms

Applications

  • Long-distance motion detection (with lens)
  • Energy saving applications
  • Intrusion alarms
  • Horizontal mounting applications
ProductPhoto_IR_PYD-1798-schematic.png
  • Responsivity: 4.2 kV/W (typical)
  • Noise: 3 digits (typ), 12 digits(max)
  • Housing with optical window: TO-5
     
  • PYD 1798 Power requirement: 1.8-3.6 V / 5 µA
  • PYD 1798 Field-of-view (horiz/vert): 110°/110°
     
  • PYD 1788 Power requirement: 2.7-3.6 V / 10 µA
  • PYD 1788 Field-of-view (horiz/vert): 95°/87
  • Responsivity: 4.2 kV/W (typical)
  • Noise: 3 digits (typ), 12 digits(max)
  • Housing with optical window: TO-5
     
  • PYD 1798 Power requirement: 1.8-3.6 V / 5 µA
  • PYD 1798 Field-of-view (horiz/vert): 110°/110°
     
  • PYD 1788 Power requirement: 2.7-3.6 V / 10 µA
  • PYD 1788 Field-of-view (horiz/vert): 95°/87