국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Operation of a Giant Magnetoresistive (GMR) Digital Isolator, Type IL510, Under Extreme Temperatures
저자	Patterson, Richard;; Hammoud, Ahmad;; Panko, Scott
Keyword	CHIPS;; COMMERCIAL OFF-THE-SHELF PRODUCTS;; ISOLATION;; MAGNETORESISTIVITY;; PACKAGING;; SEMICONDUCTORS (MATERIALS); SPACE EXPLORATION;; STABILITY;; TEST RANGES;; THERMAL CYCLING TESTS
URL	http://hdl.handle.net/2060/20100041298
보고서번호	E-17526
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	A relatively new type of signal isolation based on Giant Magnetoresistive (GMR) technology was investigated for potential use in harsh temperature environments. Operational characteristics of the 2Mbps single channel, IL510-Series commercial-off-the-shelf (COTS) digital isolator chip was obtained under extreme temperature exposure and thermal cycling in the range of -190 C to +120 C. The isolator was evaluated in terms of its output signal delivery and stability, output rise (t(sub r)) and fall times (t(sub f)), and propagation delays at 50% level between input and output during low to high (t(sub PLH)) and high to low (t(sub PHL)) transitions. The device performed very well throughout the entire test temperature range as no significant changes occurred either in its function or in its output signal timing characteristics. The limited thermal cycling, which comprised of 12 cycles between -190 C and +120 C, also had no influence on its performance. In addition, the device packaging underwent no structural damage due to the extreme temperature exposure. These preliminary results indicate that this semiconductor chip has the potential for use in a temperature range that extends beyond its specified regime. Additional and more comprehensive testing, however, is required to establish its operation and reliability and to determine its suitability for long-term use in space exploration missions.