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TL1431FK Arkusz danych(PDF) 7 Page - Texas Instruments |
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TL1431FK Arkusz danych(HTML) 7 Page - Texas Instruments |
7 / 18 page TL1431 PRECISION PROGRAMMABLE REFERENCE SLVS062F – DECEMBER 1991 – REVISED JANUARY 2000 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics at IKA = 10 mA, TA = 25°C PARAMETER TEST CONDITIONS TEST TL1431Y UNIT PARAMETER TEST CONDITIONS CIRCUIT MIN TYP MAX UNIT VI(ref) Reference input voltage VKA = VI(ref) Figure 1 2490 2500 2510 mV DV I(ref) Ratio of change in reference input voltage ∆VKA =3Vto36V Figure 2 11 2 mV/V I(ref) DV KA gg to the change in cathode voltage ∆VKA = 3 V to 36 V Figure 2 –1.1 –2 mV/V II(ref) Reference input current R1 = 10 k Ω, R2 = ∞ Figure 2 1.44 2.5 µA IKAmin Minimum cathode current for regulation VKA = VI(ref) to 36 V Figure 1 0.45 1 mA Ioff Off-state cathode current VKA = 36 V, Vref = 0 Figure 3 0.18 0.5 µA |zKA| Output impedance† VKA = VI(ref), f ≤ 1 kHz, IKA = 1 mA to 100 mA Figure 1 0.2 0.4 Ω † The output impedance is defined as: |z ′| + DV DI When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by: z KA + DV KA DI KA , which is approximately equal to z KA 1 ) R1 R2 . PARAMETER MEASUREMENT INFORMATION where: ∆TA is the rated operating temperature range of the device. Max VI(ref) Min VI(ref) ∆TA VI(dev) a V I(ref) ppm °C + V I(dev) V I(ref) at 25 °C 106 DT A Input VKA IKA VI(ref) Figure 1. Test Circuit for V(KA) = Vref Input VKA IKA VI(ref) II(ref) R1 R2 V KA + V I(ref) 1 ) R1 R2 ) I I(ref) R1 Figure 2. Test Circuit for V(KA) > Vref |
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