Many industries are calling for electronics that can operate reliably in harsh environments, including extremely high temperatures well beyond the typical industrial or military specs. In these applications cooling is often not possible because there is either nowhere to move the heat (as in downhole drilling where an instrument is miles underground at 200C), or cooling systems may pose reliability, cost or size concerns. Whatever the reason, when operating at these elevated temps, it affects multiple facets of the electronics design, including the silicon, packaging, qualification and circuit design.
ADI recently released the first instrumentation amplifier designed from the ground up for extreme temperatures, the AD8229, rated for 210C. It uses a robust silicon-on-insulator process, specialized design techniques, and high-temp compliant packaging to achieve this feat. Another recently released high temp product is the dual axis, +/- 5G ADXL206 accelerometer. You can learn more about both of these parts at ADI's high temp microsite. Check out the video below to see both of these parts in action:
You can read much more about high temperature electronics in our Analog Dialogue article on this topic. Gustavo and I would love to hear any questions or comments you may have about the article, or your experiences with high temp electronics -- so we invite you to post your comments below.
Jeff Watson and Gustavo Castro