?2001 fairchild semiconductor corporation www.fairchildsemi.com rev. 1.0.1 features ? low temperature coefficient ? low dynamic resistance ? typical reference voltage of 33v description the ka33v is a monolithic integrated voltage stabilizer especially designed as voltage supplier for electronic tuners. schematic diagram r4 d1 d2 d3 d4 d5 q3 q2 r3 r2 r1 2 cathode 1 anode ka33v voltage stabilizer to-92 1. anode 2. cathode 1
ka33v 2 absolute maximum ratings (t a= 25 c) electrical characteristics (t a = 25 c) parameter symbol value unit zener current i z 10 ma power dissipation (t a = 75 c) p d 200 mw operating ambient temperature range t opr -20 ~ 75 c storage temperature range t stg -40 ~ 125 c parameter symbol conditions min. typ. max. unit stabilized voltage v z i z = 5ma 31 35 v stabilized voltage-temperature drift ? v z / ? t i z = 5ma t a = -20 to 75 c -1 0 1 mv/ c dynamic resistance r z i z = 5ma, f = 1khz - 10 25 -
ka33v 3 measuring circuits figure 1. measuring circuit for stabilized voltage v z figure 2. measuring circuit for dynamic resistance ka33v v rb eb 1 volt meter a 2 iz = 5ma a ka33v eb 0.1 f c 2 1 vv1 vv2 ~ 50 f 100 f = 1khz + rb iz iac = iz 10 05ma r z = vv 1 0.5ma 5ma vz iz fig. 3 0.5ma 1 w1
ka33v 4 typical application 1) uhf tuner 2) vhf tuner ka33v 15k 15k 15k vi c ri 2 1 c c ach bch ych zch channel se ttin g variable re sisto r to tuning diodes (varactor) in case of ych on antenna d1 tr1 d2 d3 d5 d4 tr2 tr1 : rf amp: ksc1393 k sc 1070 (u nder deve lopm ent) tr2 : osc: skc1730 d1 - d4 : 1s220 d5: mixer: 1ss16 afc term inal antenna d1 tr1 d2 d3 d4 tr3 tr2 tr1 : rm amp : ksc1393 tr2 : m ixer : ksc1394 tr 3 : o sc : k sc 1730 d1, d4 : 1s2209 d2, d3 : 1s2207 afc terminal low/high channel s w itching term inal.
ka33v 5 power-temperature derating durve typical characteristic curves (t a = 25 c) figure7. allowable dissipation vs. amblent temperature figure8. dynamic resistance vs. zener current figure9. stabilized voltage temperature drift vs. zener current figure10. stabilized voliage variation vs. time figure11. stabilized voltage variation & supply voltage variation vs. zener current
ka33v 6 mechanical dimensions package dimensions in millimeters to-92
ka33v 7 ordering information product number package operating temperature ka33v to-92
ka33v 9/25/01 0.0m 001 stock#dsxxxxxxxx ? 2001 fairchild semiconductor corporation life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others.
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