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| @vic Adjustable Reference Source FEATURES The output voltage can be adjusted to 36V Low dynamic output impedance ,its typical value is 0.2 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 0.5% and 1% precision AV431LT1 ABSOLUTE MAXIMUM RATINGS Operating temperature range applies unless otherwise specified Parameter Cathode Voltage Cathode Current Range (Continuous) Reference lnput Current Range Power Dissipation Operating temperature Storage temperature Range SYMBOL VKA IKA Iref PD Topr Tstg VALUE 37 -100-+150 0.05-+10 770 0-70 -65-+150 UNITS V mA mA mW ELECTRICAL CHARACTERISTICSTamb=25 unless otherwise specified 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 Symbol Vref Vref/T Test conditions VKA=VREF, IKA=10mA VKA =VREF, IKA =10mA Tmin Ta Tmax VKA =10V VREF VKA =36V 10V MIN 2.440 TYP 2.495 4.5 -1.0 MAX 2.550 17 -2.7 UNIT V mV m V/V Vref/VKA IKA=10m A -0.5 1.5 -2.0 4 Reference lnput Current Deviation Of Reference lnput Current Over Full Temperature Range Minimum cathode current for Regulation Off-state cathode Current Dynamic impedance lref IKA= 10mA,R1=10K R2= lKA=10mA, R1=10K R2= TA=full Temperature VKA=VREF VKA=36V ,VREF=0 VKA=VREF,lKA=1 to 100mA f 1.0KHz A lref/T 0.4 1.2 A mA A IKA(min) IKA(OFF) ZKA 0.45 0.05 0.15 1.0 1.0 0.5 Note:TMIN=0 ,TMAX=+70 Copyright (c) Avic Electronics Corp. 1 Website: http://www.avictek.com @vic TYPICAL APPLICATIONS Vref-REFERENCE INPUT VOLTAGE - (mV) Iref-REFERENCE INPUT CURRENT - (A) 2600 2580 VKA = Vref IK = 10mA 2560 2540 2520 2500 2480 2460 2440 2420 2400 -50 Vref = 2440mV 3.0 Vref = 2550mV R1 = 10k 2.5 R2 = K = 10mA 2.0 1.5 1.0 0.5 0 -25 0 25 50 75 100 125 -75 -50 -25 0 AV431LT1 Vref = 2495mV 25 50 70 100 125 C - TEMPERATURE - (C) Figure 1.Reference Input Voltage vs. Temperature C - TEMPERATURE - (C) Figure 2.Reference Input Current vs. Temperature CATHODE CURRENT - (mA) Ioff-OFF-STATE CATHODE CURRENT - (nA) 150 125 VKA = Vref Tamb = 25C 100 75 50 25 0 -25 -50 -75 -100 90 80 70 60 50 40 30 20 10 0 VKA = 36V Vref = 0V -2 -1 0 1 2 3 -75 -50 -25 0 25 50 75 100 125 CATHODE VOLTAGE - (V) Figure 3.Cathode Current vs. Cathode Voltage C - TEMPERATURE - (C) Figure 4.Off-State Cathode Current vs. Temperature IK-CATHODE CURRENT - ( A) 800 600 400 200 0 -200 d(Vref)/d(Vka) - (mV/V) VKA = Vref Tamb = 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 -1 VKA = 3V TO 36V -1 0 1 2 3 -75 -50 -25 0 25 50 75 100 125 VKA-CATHODE VOLTAGE - (V) Figure 5.Cathode Current vs. Cathode Voltage C - TEMPERATURE - (C) Figure 6.Ratio of Delta Reference Voltage to Delta Cathode Voltage over Temperature Copyright (c) Avic Electronics Corp. 2 Website: http://www.avictek.com @vic INPUT AND OUTPUT VOLTAGE -V 7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 PULSE GENERATOR F=100KHz AV431LT1 220 OUTPUT 50 GND Test Circuit t - TIME -S Figure 7. Pulse Response 100 |ZKA| - REFERENCE IMPEDANCE - IK=10mA Tamb=25C 1K OUTPUT 10 IK 50 1 GND 0.1 1K 10K 100K 1M 10M Test Circuit for Reference Impedance f - FREQUENCY - Hz Figure 8.Reference Impedance vs. Frequency Av - VOLTAGE AMPLIFICATION - dB 70 I =10mA K 60 Tamb=25C 50 IK 40 30 20 10 0 1K 10K 100K 1M 10M Test Circuit for Voltage Amplification 9F 15K 230 OUTPUT 8.25K GND FREQUENCY IN Hz Figure 9.Small-Signal Voltage Amplification vs. Frequency Copyright (c) Avic Electronics Corp. 3 Website: http://www.avictek.com @vic TYPICAL APPLICATIONS AV431LT1 Figure 10.Shunt Regulator Figure 11.Series Pass Regulator Figure 12.Single-Supply Comparator with Temperature-Compensated Threshold Figure 13.Constant Current Source Figure 14.High Current Shunt Figure 15.Constant Current Sink Copyright (c) Avic Electronics Corp. 4 Website: http://www.avictek.com |
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