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Mobilna Elektronika Praktyczna

Podzespoły  LTM2894 - Izolator szyny USB 

 

Firma Linear technology poinformowała o wprowadzeniu do produkcji układu izolatora interfejsu USB typu LTM2894. Zapewnia on zabezpieczenie przed przepięciami o wartości do 7,5 kV i szybkości narastania do 50 kV/µs.

Nowy układ jest przeznaczony do zastosowania w interfejsach USB 2.0 pracujących w trudnych warunkach przemysłowych oraz w urządzeniach medycznych, w których priorytetem jest zapewnienie bezpieczeństwa użytkownika dzięki izolacji galwanicznej.

Układ LTM2984 może pracować przy różnicy potencjałów w odniesieniu do masy wynoszącej do 1000 Vrms. Przerwa pomiędzy izolowanymi obwodami w wypadku LTM2894 wynosi 17,4 mm, co zapewnia zgodność ze standardem IEC 60601-1 i umożliwia zastosowanie układu przy napięciu zasilania do 250 V, przy poziomie ochronie pacjenta 2×MOPP.

Układ jest zabezpieczony przed wyładowaniami ESD do ±20 kV. Może pracować w trybie USB2.0 full speed (12 Mb/s) lub USB 2.0 low speed (1,5 Mb/s). Nie wymaga żadnych elementów współpracujących (rezystory zintegrowano w układzie).

Jest oferowany w obudowie BGA zajmującej powierzchnię o wymiarach 22 mm×6,25 mm w wersjach na komercyjny, przemysłowy i samochodowy zakres temperatury pracy.

Więcej na www.linear.com

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