Analog Pyroelectric Detectors

Broadcom's thin-film pyroelectric infrared (IR) flame detectors offer exceptionally high responsivity, a wide field of view (typically 100°, subject to filter bandpass specification), and rapid recovery from thermal and electrical shocks (typically <1 second downtime). This current mode sensor has excellent signal-to-noise at the signature 8 Hz to 10 Hz flicker range of a flame. It can accurately discriminate flame sources in triple IR flame detection systems. The sensor element is built into a low noise circuit that has an internal CMOS op amp with a 10 GΩ feedback resistor outputting a voltage signal centered around half the supply rail.

Broadcom's thin-film pyroelectric IR sensors for gas detection and other substance concentration measurements offer exceptionally high responsivity, low microphonics, and excellent thermal and electrical stability. This high-performance current mode sensor achieves a signal-to-noise of ~10,000 and offers a fast, stable response over a wide operating frequency range. The sensor elements are built into a low noise circuit that has an internal CMOS op amp with a 10 GΩ feedback resistor outputting a voltage signal centered around half the supply rail.