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TL431BCLT1 Fiches technique(PDF) 4 Page - First Components International |
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TL431BCLT1 Fiches technique(HTML) 4 Page - First Components International |
4 / 12 page 4 2001-05-A TL431 Programmable Precision Reference -- 1.8 4.0 Reference Input Current (Figure 2) IK=10mA, R1=10k, R2=∞ TA=+25℃ TA=Tlow to Thigh (Note 1) Iref -- -- 5.2 µA Reference Input Current Deviation Over Temperature Range (Figure 2, Note 1) IK=10mA, R1=10k, R2=∞ ΔIref -- 0.4 1.2 µA Minimum Cathode Current for Regulation VKA=Vref (Figure 1) Imin -- 0.5 1.0 mA Off-State Cathode Current (Figure 3) VKA=36V, Vref =0V Ioff -- 260 1000 nA Dynamic Impedance (Figure 1, Note 3) VKA=Vref, ΔIK=1.0mA to 100mA, f< 1.0kHz |ZKA| -- 0.22 0.5 Ω 1 Tlow=0℃, Thigh=+70℃ 2 The deviation parameter ΔVref is defined as the differences between the maximum and minimum values obtained over the full operating ambient temperature range the applies. The average temperature coefficient of the reference input voltage, αVref, is defined as: αVref C ° ppm = A ref ref T C V V ∆ × ° ∆ 6 10 25 @ = ) 25 @ ( 10 6 C V T V ref A ref ° ∆ × ∆ αVref can be positive or negative depending on whether Vref Min of Vref Max occurs at the lower ambient temperature. (Refer to Figure 6) Example: ΔVref =8.0mV and slope is positive, Vref @25℃=2.495V, ΔTA=70℃ αVref = ) 495 . 2 ( 70 10 008 . 0 6 × =45.8 ppm/℃ |
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