PYD Series Dual-element Pyrodetectors PIR

Analog Output; Responsivity 4.2 kV/W Typ.; Max. Match 10%; Max. Noise 50 µVpp; FoV Horizontal 71°-110°; FoV Vertical 71°-110°; Operating Voltage 2.0-10 VDC

Excelitas PYD Series of dual-element pyrodetectors are well established as the performance standard in motion detection.

This series’ design features two sensing elements connected to each other in reverse polarity (opposed series connection) with a FET in-source follower circuit to provide an AC-signal with motion and common mode rejection for non-moving radiation. Users can specify various window sizes to meet desired fields-of-view.

Integrated into a TO-5 metal housing with a small optical window, the Excelitas PYD 1378 dual-element pyrodetector (replacement to the LHi 778) delivers exceptional economy and value for high-volume motion detection applications without sacrificing performance.

PYD 1388 (replacement to LHi 878) and PYD 1398 (replacement to LHi 968) dual-element pyrodetectors represent Excelitas’ standard analog pyrodetector offering. They are integrated into a robust TO-5 metal housing with an optical window. The PYD 1388 is the base model, while the PYD 1398 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 two EMI versions. The standard version features one RC-filter at drain and source pin. For applications in heavy 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.

PYD 1384 (replacement to LHi 874) and PYD 1394 (replacement to LHi 944) dual-element pyrodetectors are the low-profile variants of the PYD 1388/1398 standard analog PIRs in a low-profile TO-39 metal housing with optical window. The PYD 1384 is the standard base model of the low-profile series, while the PYD 1394 is equipped with a larger window that provides a wider field-of-view.

An additional drain resistor and output capacitor further reduce interference effects of electromagnetic disturbances for EMI sensitive applications. Ideally suited for motion detection, the low-profile design permits two pyros to be space-efficiently integrated together to enable a 180° field-of-view.

Applications: Optimal for Cost-effective Designs; Long-distance Human Motion Detection (With Lens); Energy-saving Applications; Intrusion Alarms; Horizontal Mounting Applications