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TL1431-Q1 数据表(PDF) 4 Page - Texas Instruments |
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TL1431-Q1 数据表(HTML) 4 Page - Texas Instruments |
4 / 19 page TL1431Q1 PRECISION PROGRAMMABLE REFERENCE SLVS534B − JUNE 2004 − REVISED APRIL 2008 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics at specified free-air temperature, IKA = 10 mA (unless otherwise noted) PARAMETER TEST CONDITIONS TA† TEST CIRCUIT MIN TYP MAX UNIT VI(ref) Reference input voltage VKA = VI(ref) 25 °C Figure 1 2490 2500 2510 mV VI(ref) Reference input voltage VKA = VI(ref) Full range Figure 1 2470 2530 mV VI(dev) Deviation of reference input voltage over full temperature range‡ VKA = VI(ref) Full range Figure 1 17 55 mV DV I(ref) DV KA Ratio of change in reference input voltage to the change in cathode voltage ∆VKA = 3 V to 36 V Full range Figure 2 −1.1 −2 mV/V II(ref) Reference input current R1 = 10 k Ω, R2 = 25 °C Figure 2 1.5 2.5 A II(ref) Reference input current R1 = 10 k Ω, R2 = ∞ Full range Figure 2 4 µA II(dev) Deviation of reference input current over full temperature range‡ R1 = 10 k Ω, R2 = ∞ Full range Figure 2 0.5 2 µA Imin Minimum cathode current for regulation VKA = VI(ref) 25 °C Figure 1 0.45 1 mA Ioff Off-state cathode current VKA = 36 V, VI(ref) = 0 25 °C Figure 3 0.18 0.5 A Ioff Off-state cathode current VKA = 36 V, VI(ref) = 0 Full range Figure 3 2 µA |zKA| Output impedance§ VKA = VI(ref), f ≤ 1 kHz, IKA = 1 mA to 100 mA 25 °C Figure 1 0.2 0.4 Ω † Full range is −40°C to 125°C for Q-suffix devices. ‡ 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 a V I(ref) is defined as: 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 a V I(ref) is positive or negative, depending on whether minimum VI(ref) or maximum VI(ref), respectively, occurs at the lower temperature. § The output impedance is defined as: z KA + DV KA DI KA When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by: |z ′| + DV DI , which is approximately equal to z KA 1 ) R1 R2 . |
类似零件编号 - TL1431-Q1_15 |
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类似说明 - TL1431-Q1_15 |
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