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 (replacement to LHi 968) 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 and a gate resistor for better low temperature performance. Both sensors are available in 2 EMI versions. The standard version features 1 RC-Filter at drain and source pin. For applications in strong EMI conditions  (5G and antennas close to the sensor) a version with an additional RC-filtering stage is available to further reduce interference effects of electromagnetic disturbances.Â
Features
- TO-5 metal housing for EMI shielding
- High responsivity ceramic pyroelectric elements
- Dual detector with 2 × 1 mm2 elements
- 95°/100° field-of-view
- Integrated FET in source follower configuration
- Integrated EMI filtering stage
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Applications
- Horizontal mounting applications
- Optimal for cost-effective designs
- Long-distance human motion detection (with lens)
- Energy-saving applications
- Intrusion alarms
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- 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