micropac industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. micropac reserves the right to make changes at any time in order to improve design and to suppl y the best product possible. micropac industries, inc. hybrid microelectronics products division 905 e. walnut st., garland, tx 75040 (972) 272 - 3571 fax (972) 494 - 2281 www.micropac.com e - mail: microsales@micropac.com 5/19/05 page 1 of 7 52458 dual current - to - current opto - isolator, high temperature (200c) mii features: hermetically sealed package optically coupled input/output isolation tested to 1000 vdc 200c operation applications: signal isolation description the 52458 is a current - to - current opto - isolator designed for high temperature applications to 200oc. functionally, the device operates as a current - to - current t ransformer with an output current proportional to the input current. the current transfer ratio is tightly controlled for temperatures from 25oc through 200oc. absolute maximum ratings continuous input current ................................ ................................ ................................ .......................... 20ma storage temperature range ................................ ................................ ................................ ..... - 65oc to +2 00oc operating temperature ................................ ................................ ................................ ............ - 55oc to +200 oc lead solder temperature for 10 seconds ................................ ................................ ................................ .. 300oc reverse input voltage ................................ ................................ ................................ ............................. 6 vdc recommended operating conditions: parameter symbol min. max. units output voltage v o 1.0 vdc input current i f (on) 5 15 ma input voltage v f 1.1 1.6 vdc operating case temperature t c - 55 200 c
micropac industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. micropac reserves the right to make changes at any time in order to improve design and to suppl y the best product possible. micropac industries, inc. hybrid microelectronics products division 905 e. walnut st., garland, tx 75040 (972) 272 - 3571 fax (972) 494 - 2281 www.micropac.com e - mail: microsales@micropac.com 5/19/05 page 2 of 7 52458 current - to - current opto - isolator, high temperature electrical specificati ons t c = 25c to +200c unless otherwise specified parameter sym. min. typ.* max. units test conditions notes input / output forward voltage v f ? 1.6 2.2 vdc i f = 10 ma input / output reverse breakdown voltage v r 6 40 ? vdc i r = 10 m a input - output l eakage i i - o ? ? 1 m a rh 45%, t = 5 s v i - o = 1000 vdc t c = 25c 1,2 turn - on time t on ? 150 ns turn - off time t off ? 100 ns rise time t r ? 130 ns fall time t f ? 90 ns i f = 2.5 ma e o = ov, shorted note 4 3 output current 80 m a i f = 10 m a notes: 1. input pins are shorted together and output pins are shorted together. 2. input - output potential applied momentarily, not an operating condition. 3. rise time is measured from 10% to 90% of output current. fall time is measured from 90% to 10% of out put. 4. measured values limited by the test transimpedance circuit.
micropac industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. micropac reserves the right to make changes at any time in order to improve design and to suppl y the best product possible. micropac industries, inc. hybrid microelectronics products division 905 e. walnut st., garland, tx 75040 (972) 272 - 3571 fax (972) 494 - 2281 www.micropac.com e - mail: microsales@micropac.com 5/19/05 page 3 of 7 52458 dual current - to - current opto - isolator, high temperature figure 1. output current vs. temperature current transfer ratio (typical) 0.0 10.0 20.0 30.0 40.0 50.0 60.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 i in (ma) i out (ua) 25c 150c 200c -55c figure 2. output current vs. input current (0.5ma ? 5ma) 0.0 10.0 20.0 30.0 40.0 50.0 60.0 -55 c 25 c 150 c 200 c output current (ua) 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
micropac industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. micropac reserves the right to make changes at any time in order to improve design and to suppl y the best product possible. micropac industries, inc. hybrid microelectronics products division 905 e. walnut st., garland, tx 75040 (972) 272 - 3571 fax (972) 494 - 2281 www.micropac.com e - mail: microsales@micropac.com 5/19/05 page 4 of 7 52458 dual current - to - current opto - isolator, high temperature current transfer ratio (typical) 0.0 50.0 100.0 150.0 200.0 250.0 0.0 5.0 10.0 15.0 20.0 i in (ma) i out (ua) 25c 150c 200c -55c figure 3. output current v s. input current (0.5ma ? 20ma) pin function 1 + in (section 1) 2 - in (section 1) 3 - out (section 2) 4 + out (section 2) 5 + in (section 2) 6 - in (section 2) 7 - out (section 1) 8 + out (section 1) 1. esd symbol ( d ) indicates pin 1. table 1. pin outs
micropac industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. micropac reserves the right to make changes at any time in order to improve design and to suppl y the best product possible. micropac industries, inc. hybrid microelectronics products division 905 e. walnut st., garland, tx 75040 (972) 272 - 3571 fax (972) 494 - 2281 www.micropac.com e - mail: microsales@micropac.com 5/19/05 page 5 of 7 52458 dual current - to - current opto - isolator, high temperature note: package is a ceramic 8 pin dip figure 4. case outline application notes: 52458.01 isolated current monitor. figure 1 is a simple, moderately accurate circuit for monitoring an isolated load current. the heart of the circuit is the 52458 opto coupler. the led current of the coupler is the sum of 1; the bias current of q2, q1 / h fe (q1) and q3 / h fe (q3) and 2; the collect or current of q1. q1 and q3 form a current mirror with an emitter current ration if r3 / r2. a q3 emitter current of 0.5a represents a 0.010a current at the emitter of q1 and a total load current of 0.510a. the op amp output voltage is the output curr ent of the 52458 opto coupler times the r feedback value. in this circuit case, 1 m a of detector current produces a 0.1v output. the total circuit then has a transfer value of (10ma of led current = 510ma load current) producing 80 m a of detector current x 100k ohm = 8v output. this gives 8v output for a load current of 510ma or a sensitivity of 1 volt per 63.75ma.
micropac industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. micropac reserves the right to make changes at any time in order to improve design and to suppl y the best product possible. micropac industries, inc. hybrid microelectronics products division 905 e. walnut st., garland, tx 75040 (972) 272 - 3571 fax (972) 494 - 2281 www.micropac.com e - mail: microsales@micropac.com 5/19/05 page 6 of 7 52458 dual current - to - current opto - isolator, high tempera ture v out / current linearity 0 1 2 3 4 5 6 7 0 140 233 330 427 ma output v output circuit voltage verses output current 0 50 100 150 200 250 300 350 400 450 2.487 3.297 3.849 4.353 4.888 circuit voltage drop i output
micropac industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. micropac reserves the right to make changes at any time in order to improve design and to suppl y the best product possible. micropac industries, inc. hybrid microelectronics products division 905 e. walnut st., garland, tx 75040 (972) 272 - 3571 fax (972) 494 - 2281 www.micropac.com e - mail: microsales@micropac.com 5/19/05 page 7 of 7 52458 dual current - to - current opto - isolator, high temperature the follow ing chart illustrates the optocoupler output as a function of load current for the circuit of figure 1. vin i load voltage across v out volts ma power circuit 10 0 2.487 .12 10 140 3.297 1.95 10 233 3.849 3.43 10 330 4.353 4.87 10 427 4.888 6.37 30 0 2.517 .19 30 140 3 1.96 30 233 3.837 3.42 30 330 4.376 4.89 30 427 4.876 6.36 the following chart illustrates the effects of temperature on the coupler output. vin volts i load ma temp. deg, c i out ua 20 0.33 25 48.8 20 0.33 125 48.7 20 0. 33 150 47 temp effects @ 0.33a 4.6 4.65 4.7 4.75 4.8 4.85 4.9 25 125 150 temperature v output v out / i out verses input voltage 0 1 2 3 4 5 6 7 0 140 233 330 427 ma output v output 10 v in 20 v in 30 v in
|
