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KIA431 Scheda tecnica(PDF) 4 Page - KEC(Korea Electronics) |
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KIA431 Scheda tecnica(HTML) 4 Page - KEC(Korea Electronics) |
4 / 8 page 2015. 5. 13 4/8 KIA431 Series Revision No : 19 Input FIGURE 1-TEST CIRCUIT FOR VKA = Vref off I KA V Input FIGURE 3-TEST CIRCUIT FOR I off FIGURE 2-TEST CIRCUIT FOR VKA > Vref IK IK VKA VKA Input R1 R2 Iref VKA = Vref ( 1+ ) + Iref R1 R1 R2 Max. Min. T1 T2 AMBIENT TEMPERATURE - Vref (Min.) Ta = T2 - T1 Vref Vref Vref Vref = Vref (Max.) Vref Example : ΔV ref = 8.0mV and slope is positive, Vref at 25℃=2.495V, ΔTa=70℃ 0.008 ×106 αV ref = = 45.8 ppm/ ℃ 70 ×(2.495) Note 2: The dynamic impedance Zka is defined as: ΔVKA |Zka| = ΔIk When the device is programmed with two external resistors, R1 and R2, (refer to Figure 2) the total dynamic impedance of the circuit is defined as: R1 |Zka’| = |Zka| (1+ ) R2 Note 1: The deviation parameter ΔV ref is defined as the differences between the maximum and minimum values obtained over the full operating ambient temperature range that applies. The average temperature coefficient of the Reference input voltage, ΔV ref , is defined as: ΔV ref ( ) × 106 ppm Vref at 25℃ αV ref ( ) = ℃ΔTa ΔV ref × 10 6 = ΔTa(V ref at 25℃) αV ref can be positive or negative depending on whether Vref Min. or Vref Max. occurs at the lower ambient temperature. |
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