Datasheet > 2.5-VLVTTL

2.5-VLVTTL

更新时间： 2022-06-03 06:49:30

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阿尔特拉 - ALTERA		开关
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描述
This chapterdescribes the electric characteristics, switching characteristics,and I/O timing for Cyclone III devices. A glossary is also included for your reference

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2.5-VLVTTL 数据手册

Chapter 1: Cyclone III Device Datasheet

1–7

Electrical Characteristics

The OCT resistance may vary with the variation of temperature and voltage after

calibration at device power-up. Use Table 1–8 and Equation 1–1 to determine the final

OCT resistance considering the variations after calibration at device power-up.

Table 1–8 lists the change percentage of the OCT resistance with voltage and

temperature.

Table 1–8. Cyclone III Devices OCT Variation After Calibration at Device Power-Up

Nominal Voltage

dR/dT (%/°C)

0.262

dR/dV (%/mV)

–0.026

3.0

2.5

1.8

1.5

1.2

0.234

–0.039

0.219

–0.086

0.199

–0.136

0.161

–0.288

(1), (2), (3), (4), (5), (6)

Equation 1–1.

(7)

R_V= (V₂– V₁) × 1000 × dR/dV

(8)

R_T= (T₂– T₁) × dR/dT

(9)

For R_x< 0; MF_x= 1/ (|R_x|/100 + 1)

(10)

For R_x> 0; MF_x= R_x/100 + 1

(11)

MF = MF_V× MF_T

(12)

R_final= R_initial× MF

Notes to Equation 1–1:

(1) T₂is the final temperature.

(2) T₁is the initial temperature.

(3) MF is multiplication factor.

(4) R_finalis final resistance.

(5) R_initialis initial resistance.

(6) Subscript × refers to both _Vand _T.

(7) R_Vis variation of resistance with voltage.

(8) R_Tis variation of resistance with temperature.

(9) dR/dT is the change percentage of resistance with temperature after calibration at device power-up.

(10) dR/dV is the change percentage of resistance with voltage after calibration at device power-up.

(11) V₂is final voltage.

(12) V₁is the initial voltage.

July 2012 Altera Corporation

Cyclone III Device Handbook

Volume 2

1...4 5 678 9 10...34

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