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TL1431-EP bảng dữ liệu(PDF) 5 Page - Texas Instruments |
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5 / 23 page |z | V I , = z KA 1 R1 R2 = ( ) + zKA VKA IKA = V I(ref) α where: TA is the rated operating temperature range of the device. Max VI(ref) Min VI(ref) TA VI(dev) V I(ref) ppm °C V I(dev) V I(ref) at 25 °C 106 T A | | α ( ) = ( ) × V I(ref) α DVI(ref) DVKA rated temperature range. The average full-range temperature coefficient of the reference input voltage is defined as: is positive or negative, depending on whether minimum VI(ref) or maximum VI(ref), respectively, occurs at the lower temperature. (3) The output impedance is defined as: , which is approximately equal to . TL1431-EP www.ti.com SLVS529D – APRIL 2004 – REVISED JANUARY 2015 7.6 Electrical Characteristics at specified free-air temperature, IKA = 10 mA (unless otherwise noted) TEST PARAMETER TEST CONDITIONS TA (1) MIN TYP MAX UNIT CIRCUIT 25°C 2490 2500 2510 VI(ref) Reference input voltage VKA = VI(ref) Figure 8 mV Full range 2470 2530 Deviation of reference input VI(dev) voltage over full temperature VKA = VI(ref) Full range Figure 8 17 mV range(2) Ratio of change in reference input voltage to the change in ΔVKA = 3 to 36 V Full range Figure 9 –1.1 –2 mV/V cathode voltage 25°C 1.5 2.5 II(ref) Reference input current R1 = 10 k Ω, R2 = ∞ Figure 9 μA Full range 4 Deviation of reference input II(dev) current over full temperature R1 = 10 k Ω, R2 = ∞ Full range Figure 9 0.5 μA range(2) Minimum cathode current for Imin VKA = VI(ref) 25°C Figure 8 0.45 1 mA regulation 25°C 0.18 0.5 Ioff Off-state cathode current VKA = 36 V, VI(ref) = 0 Figure 10 μA Full range 2 VKA = VI(ref), ƒ ≤ 1 kHz, |zKA| Output impedance(3) 25°C Figure 8 0.2 0.4 Ω IKA = 1 to 100 mA (1) Full range is –40°C to 125°C for Q-suffix devices; –55°C to 125°C for M-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 When the device is operating with two external resistors (see Figure 9), the total dynamic impedance of the circuit is given by: Copyright © 2004–2015, Texas Instruments Incorporated Submit Documentation Feedback 5 |
Số phần tương tự - TL1431-EP_15 |
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Mô tả tương tự - TL1431-EP_15 |
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