WT431A

WT431 Adjustable Accurate Reference Source P b Lead(Pb)-Free FEATURES The output voltage can be adjusted to 36V Low dynamic output impedance ,its typical value is 0.2Ω Trapping current capability is 1 to 100mA The typical value of the equivalent temperature factor in the whole temperature scope is 50 ppm/℃ The effective temperature compensation in the working range of full temperature Low output noise voltage Fast on -state response 1.REFERENCE 2.ANODE 3.CATHODE TO-92 123 ABSOLUTE MAXIMUM RATINGS（Operating temperature range applies unless otherwise specified） SYMBOL VALUE UNITS Parameter Cathode Voltage Cathode Current Range (Continuous) Reference lnput Current Range Power Dissipation Operating temperature Storage temperature Range V KA IKA Iref PD Topr Tstg 37 -100-+150 0.05-+10 770 0-70 -65-+150℃ V mA mA mW ℃ ℃ ELECTRICAL CHARACTERISTICS（Tamb=25℃ Parameter Reference lnput Voltage Deviation of reference input Voltage Over temperature (note) Ratio Of Change in Reference lnput Voltage to the change in Cathode Voltage Reference lnput Current Deviation Of Reference lnput Current Over Full Temperature Range Minimum cathode current for regulation Off-state cathode Current Dynamic lmpedance Symbol Vref △Vref/△T Test unless otherwise specified） MIN 2.475 TYP 2.5 4.5 -1.0 -0.5 1.5 0.4 0.45 0.05 0.15 MAX 2.525 17 -2.7 -2.0 4 1.2 1.0 1.0 0.5 UNIT V mV m V/V m V/V conditions VKA=VREF, IKA=10mA VKA =VREF, IKA =10mA Tmin≤Ta≤Tmax △VKA =10V～VREF IKA=10mA △VKA =36V～ 10V IKA= 10mA,R1=10KΩ R2=∞ lKA=10mA, R1=10KΩ R2=∞ TA=full Temperature VKA=VREF VKA=36V ,VREF=0 VKA=VREF,lKA=1 to 100mA f≤1.0KHz △Vref/△VKA lref △lref/△T IKA(min) IKA(OFF) ZKA μA μA mA μA Ω Note:TMIN=0℃ ,TMAX=+70℃ CLASSIFICATION OF Vref Rank Range WT431 (0.5%) 2.487-2.512 WT431A (1.0%) 2.475-2.525 WT431B (2.0%) 2.450-2.550 WEITRON http://www.weitron.com.tw 1/2 01-Jun-09 WT431 WEITRON http://www.weitron.com.tw 2/2 01-Jun-09