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TLVH431ACDCKR Datasheet(PDF) 9 Page - Texas Instruments |
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TLVH431ACDCKR Datasheet(HTML) 9 Page - Texas Instruments |
9 / 38 page www.ti.com aVREF ppm oC + VREF(dev) VREF (TA+25oC) 106 DTA zKA + ΔVKA ΔIK zKA + ΔV ΔI [ zKA 1 ) R1 R2 TLVH431A Electrical Characteristics DVREF DVKA TLVH431,, TLVH431A,, TLVH431B TLVH432, TLVH432A, TLVH432B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS SLVS555G–NOVEMBER 2004–REVISED JANUARY 2006 at 25°C free-air temperature (unless otherwise noted) TLVH431A TLVH432A PARAMETER TEST CONDITIONS UNIT MIN TYP MAX TA =25°C 1.228 1.24 1.252 TLVH431AC 1.221 1.259 VKA =VREF, VREF Reference voltage V TA = full range, IK =10mA TLVH431AI 1.215 1.265 See Figure 1)(1) TLVH431AQ 1.209 1.271 TLVH431AC 4 12 VREF deviation over full VREF(dev) VKA =VREF,IK = 10 mA, See Figure 1(1) TLVH431AI 6 20 mV temperature range(2) TLVH431AQ 11 31 Ratio of VREF change to VK =VREF to 18 V, IK = 10 mA, See Figure 2 –1.5 –2.7 mV/V cathode voltage change Iref Reference terminal current IK =10mA, R1 =10kΩ, R2 = open, See Figure 2 0.1 0.5 μA TLVH431AC 0.05 0.3 Iref deviation over full IK =10mA, R1 =10kΩ, R2 = open, Iref(dev) TLVH431AI 0.1 0.4 μA temperature range(2) See Figure 2(1) TLVH431AQ 0.15 0.5 Minimum cathode current IK(min) VKA =VREF,See Figure 1 60 100 μA for regulation IK(off) Off-state cathode current VREF =0,VKA =18V,See Figure 3 0.02 0.1 μA VKA =VREF,f ≤ 1kHz,IK = 0.1 mA to 80 mA, |zKA| Dynamic impedance(3) 0.25 0.4 Ω See Figure 1 (1) Full temperature ranges are –40°C to 125°C for TLVH431Q, –40°Cto85°C for TLVH431I, and 0°Cto70°C for TLVH431C. (2) The deviation parameters VREF(dev) and Iref(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, αVREF, is defined as: where ΔTA is the rated operating free-air temperature range of the device. αVREF can be positive or negative, depending on whether minimum VREF or maximum VREF, respectively, occurs at the lower temperature. (3) The dynamic impedance is defined as: When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is defined as: 9 |
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