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TL1431MFKB Datasheet(PDF) 4 Page - Texas Instruments |
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TL1431MFKB Datasheet(HTML) 4 Page - Texas Instruments |
4 / 24 page www.ti.com where: ∆TA is the rated operating temperature range of the device. Max VI(ref) Min VI(ref) ˙TA VI(dev) α VI(ref) ppm °C V I(dev) V I(ref) at 25 °C × 10 6 T A ( ( = ( ( (3) The output impedance is defined as: ∆I KA ∆V KA |z | = KA When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by: ∆I ∆V |z'| = , which is approximately equal to R2 R1 |z | KA (1 + ( . Recommended Operating Conditions Electrical Characteristics ∆V KA ∆V I(ref) TL1431 PRECISION PROGRAMMABLE REFERENCE SLVS062K – DECEMBER 1991 – REVISED OCTOBER 2006 MIN MAX UNIT VKA Cathode voltage VI(ref) 36 V IKA Cathode current 1 100 mA TL1431C 0 70 TA Operating free-air temperature TL1431Q –40 125 °C TL1431M –55 125 at specified free-air temperature, I KA = 10 mA (unless otherwise noted) TL1431C TEST PARAMETER TEST CONDITIONS TA(1) UNIT CIRCUIT MIN TYP MAX 25 °C 2490 2500 2510 VI(ref) Reference input voltage VKA = VI(ref) Figure 1 mV Full range 2480 2520 Deviation of reference input VI(dev) voltage over full temperature VKA = VI(ref) Full range Figure 1 4 20 mV range(2) Ratio of change in reference input voltage to the change in ∆V KA = 3 V to 36 V Full range Figure 2 –1.1 –2 mV/V cathode voltage 25 °C 1.5 2.5 II(ref) Reference input current R1 = 10 k Ω, R2 = ∞ Figure 2 µA Full range 3 Deviation of reference input II(dev) current over full temperature R1 = 10 k Ω, R2 = ∞ Full range Figure 2 0.2 1.2 µA range(2) Minimum cathode current for Imin VKA = VI(ref) 25 °C Figure 1 0.45 1 mA regulation 25 °C 0.18 0.5 Ioff Off-state cathode current VKA = 36 V, VI(ref) = 0 Figure 3 µA Full range 2 VKA = VI(ref), f ≤ 1 kHz, |zKA| Output impedance(3) 25 °C Figure 1 0.2 0.4 Ω IKA = 1 mA to 100 mA (1) Full range is 0 °C to 70°C for C-suffix devices. (2) The deviation parameters VI(dev) and II(dev) are defined as the differences between the maximum and minimum values obtained over the rated temperature range. The average full-range temperature coefficient of the reference input voltage α VI(ref) is defined as: α VI(ref) is positive or negative, depending on whether minimum VI(ref) or maximum VI(ref), respectively, occurs at the lower temperature. 4 Submit Documentation Feedback |
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