Intersil Corporation has introduced precise and low output noise radiation hardened (rad-hard) voltage references. Available in space saving surface mount packaging, the ISL71090SEH12 and ISL71090SEH25 extend the company’s catalogue of devices for the latest generation of telemetry equipment, data acquisition systems and high-end instrumentation products in space and satellite applications.
System designers for modern space applications have had to make performance tradeoffs to meet stringent radiation hardened requirements. Intersil’s family of rad hard analogue devices leverage a SOI-based PR40 process providing Single Event Latch-up (SEL) immunity to ensure robust performance in heavy ion environments. This and other Intersil patented technologies reduce the need to compromise in terms of performance even when having to deal with more challenging applications. For example, the ISL71090SEHx voltage references deliver very precise analogue-to-digital conversion, providing initial voltage accuracy of ±0.05%, and ±0.15% over the entire military temperature and radiation exposure ranges. This enables support for highly precise A-to-D conversions.
The ISL71090SEHx family also features a very low temperature coefficient of 10ppm/oC and an ultralow output noise specification of 2µVp-p at 2.5Vout, and 1µVp-p at 1.25Vout. The low output noise reduces disturbances on components measuring precision signals, meeting the stringent DC precision and low noise requirements of critical high-end instrumentation, data acquisition, and processing applications.