IP431AH prelim. 3/99 semelab plc. telephone +44(0)1455) 556565. fax +44(0)1455) 552612. e-mail: sales@semelab.co.uk website: http://www.semelab.co.uk v ka cathode to anode voltage i k cathode current range i ref reference input current range p d power dissipation @ t a = 25c to39 package derate above 25c t j maximum operating junction temperature t a operating ambient temperature range t stg storage temperature range 37v - 100 to +150ma - 0.05 to +10ma 1.5w 15mw/c 150c - 55 to +125c - 65 to 150c absolute maximum ratings (t case = 25c unless otherwise stated) features ? voltage reference tolerance 1% ? programmable output voltage to 36v ? equivalent full range temperature coefficient of 30ppm/c typical ? temperature compensated for operation over full rated operating temperature range ? sink current capability 1 to 100 ma ? fast turnCon response ? low dynamic output impedance (0.2 w w typical) ? low output noise voltage 0.89 (0.035) max. 0.66 (0.026) 1.14 (0.045) 0.71 (0.028) 0.86 (0.034) 2.54 (0.100) 5.08 (0.200) typ. 45? 12.70 (0.500) min. 4.19 (0.165) 4.95 (0.195) 8.89 (0.35) 9.40 (0.37) 7.75 (0.305) 8.51 (0.335) 0.41 (0.016) 0.53 (0.021) dia. 1 2 3 pin 1 = ref pin 2 = cathode pin 3 = anode to39 package description the ip431a circuit is a monolithic three terminal programmable shunt regulator diode. this voltage reference operates as a low temperature coefficient zener which is programmable between vref (2.5v) and 36 volts using two external resistors. the device has a wide operating current range of 1ma to 100ma and a typical dynamic impedance of 0.2 w . active output circuitry provides a very sharp turn-on characteristic making these devices excellent replacements for zener diodes in many applications. being a shunt regulator it can be used as either a positive or negative voltage reference. mechanical data dimensions in mm (inches)
IP431AH prelim. 3/99 semelab plc. telephone +44(0)1455) 556565. fax +44(0)1455) 552612. e-mail: sales@semelab.co.uk website: http://www.semelab.co.uk v ka cathode to anode voltage i k cathode current range v ref to 36v 1.0 to 100ma recommended operating conditions r q ja thermal resistance, junction to ambient, r q jc thermal resistance, junction to case 160 c/w 20 c/w thermal conditions parameter test conditions min. typ. max. units v ka = v ref i k = 10ma t a = -55 to +125c * v ka = v ref i k = 10ma t a = -55 to +125c * i k = 10ma r1 = 10k w r2 = i k = 10ma t a = -55 to +125c * r1 = 10k w r2 = i k = 10ma t a = -55 to +125c * v ka = v ref v ka = 36v v ref = 0 v ka = v ref f 1khz d i k = 1ma to 100ma d v ka = 10v to v ref d v ka = 36v to 10v v ref d v ref d v ref d v ka i ref d i ref i min i off |z ka | reference input voltage reference input voltage over temperature range 1 ratio of reference voltage change to change in cathode to anode voltage reference input current reference input current deviation over temperature range minimum cathode current for regulation offCstate cathode current dynamic impedance 2 v mv mv/v m a m a ma na w 2.47 2.495 2.52 2.426 2.564 15 44 14 7 13 0.5 1 3 1000 0.2 0.5 -1.5 -2.7 -0.7 -2 electrical characteristics (t a = 25 c unless otherwise stated)
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