Infrared motion sensor PYD 1378

pyro-electricpassive infrared

Overview
The Excelitas PYD 1378 Low Cost Dual-Element Pyrodetector is a dual-element pyroelectric IR sensor designed for economical, high-volume motion detection applications. It replaces the LHi 778 and is housed in a TO-5 metal package with a small optical window. The device features two sensing elements in an opposed-series connection and includes a FET source-follower for conditioned output and easy integration.

Details
The PYD 1378 provides cost-effective performance for high-volume passive infrared (PIR) motion sensing. Two elements are connected in an opposed-series arrangement, combined with an in-source-follower FET circuit to stabilize the output. The TO-5 metal housing with optical window delivers a wide 71° horizontal/vertical field-of-view suitable for common detection geometries.

Applications

• High-volume passive infrared (PIR) motion detection modules
• Occupancy and movement sensing for lighting and security systems
• Consumer and industrial motion sensor products

Specifications

• Part number / reference: PYD 1378 (replacement for LHi 778)
• Responsivity: 4.2 kV/W (typical)
• Noise: 20 µVpp (typical) / 50 µVpp (max)
• Operating voltage: 2 – 12 V
• Housing with optical window: TO-5 metal housing
• Field-of-View (H / V): 71° / 71°
• Internal circuit: Two elements in opposed-series connection with FET source-follower