Excelitas PYD 1388 and PYD 1398 Standard Analog Dual-Element Pyro Series
Excelitas PYD1388/PYD 1398 schematic
PART/ PYD 1388 (LHi 878), PYD 1398

PYD 1388, PYD 1398 Dual-Element Pyros

This Pyrodetector Series represents Excelitas standard analog Pyrodetector offering. Our PYD 1388 (replacement to LHi 878) and PYD 1398 Dual-Element Pyrodetectors feature two elements configured in a series connection with an FET in source-follower circuit. They are integrated into a robust TO-5 Metal Housing with an optical window

Both of these Pyrodetector models provide two sensing elements in opposed series connection with a source-follower circuit.

The PYD 1388 (pictured above on left) is the base model Pyro in this Standard Analog Series. While the PYD 1398 (pictured above on right) is equipped with additional features such as a larger window to reduce white light sensitivity. An additional source resistor and gate capacitor further reduce interference effects of electromagnetic disturbances for applications where EMI stability is a factor.

Features, PYD 1388

  • TO-5 metal housing for EMI shielding
  • High responsivity ceramic pyroelectric elements
  • Dual detector with 2 × 1 mm2 elements
  • 95° field-of-view
  • Integrated FET in source follower con1guration
  • Intergrated EMI filtering stage
     

Applications

  • Horizontal mounting applications
  • Optimal for cost-effective designs
  • Long-distance human motion detection (with lens)
  • Energy-saving applications
  • Intrusion alarms
ProductPhoto_IR_PYD-1398-schematic.jpg
PYD1398 Housing Diagram
  • Responsivity: 4.2 kV/W (typical)
  • Noise: 20µVpp (typical) / 50µVpp (max)
  • Operation requirements: 2.0-10V
  • Housing with optical window: TO-5
  • PYD 1388 Field-of-View (horiz/vert): 95°/87°
  • PYD 1398 Field-of-View (horiz/vert): 100°/100°
  • PYD 1388 with 1 EMI filtering stage
  • ​​​​​​​PYD 1398 with 2 EMI filtering stages
  • Responsivity: 4.2 kV/W (typical)
  • Noise: 20µVpp (typical) / 50µVpp (max)
  • Operation requirements: 2.0-10V
  • Housing with optical window: TO-5
  • PYD 1388 Field-of-View (horiz/vert): 95°/87°
  • PYD 1398 Field-of-View (horiz/vert): 100°/100°
  • PYD 1388 with 1 EMI filtering stage
  • ​​​​​​​PYD 1398 with 2 EMI filtering stages
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