Introduction

Broadcom® thin film pyroelectric infrared (IR) sensors for gas

detection and other substance concentration measurements offer

exceptionally high responsivity, low microphonics, and classleading

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.