re v . features ? low temperature coefficient ? guaranteed temperature stability 4mv typical ?0.2 ? dynamic impedance ? 1.0% initial tolerance available ? easily trimmed for minimum temperature drift description t h e ws 3 3 6 - 2 . 5 i n te g r ated circ u its a r e p r e cisi o n 2 . 5 v shunt regulators. the monolithic ic voltage references oper- ates as a l o w te m p e r at u r e c o e f f cie n t 2 . 5 v ze n er with 0 . 2 o hm d y n a m ic i m p e d a n ce. a t h ird ter m i n a l o n t h e w s 3 3 6 - 2 . 5 allow the reference voltage and temperature coefficent to be tri m med easil y . ws 3 3 6 - 2 . 5 are u s e f u l as a p r ecisi o n 2 . 5 v low voltage reference for digital voltmeters, power supplies or op amp circuitry. the 2.5v make it convenient to obtain a stable reference from low voltage supplies. further, since the ws 3 3 6 - 2 . 5 o p e r ate as s h unt r e g u lato r s, they c a n be u sed as either a positive or negative voltage reference. internal block diagram
absolute maximum ratings electrical characteristics (0 c < t a < +70 c , unless otherwise specified) parameter symbol value unit re v e r s e c u rrent i r 15 ma forward current i f 10 ma operating temperature range ka336-2.5/b t opr 0 ~ + 70 c storage temperature range t stg - 60 ~ + 150 c p a r a me t e r s ym b o l c o ndi t i ons ws 336 -2 . 5 min. typ. max. min. typ. max. unit reverse breakdown voltage v r t a = +25 c i r = 1 m a 2.44 2.49 2.54 v reverse breakdown change with current ? v r / ? i r t a = +25 c 400ua i r 10ma -2. 6 0 1 mv reverse dynamic impedance z d t a = +25 c i r = 1 m a - 0.2 1 ? temperature stability st t i r = 1ma -1. 8 6 mv reverse breakdown change with current ? v r / ? i r 400ua i r 10ma - 3 1 2 m v reverse dynamic impedance z d i r = 1ma -0. 4 1 ? long term stability in reference voltage st i r = 1ma - 20 - ppm/khr
typical perfomance characteristics figure 1. reverse voltage change figure 3. temperature drift figure 2. reverse characteristics figure 4. forward characteristics
|
