EP4CGX75CF23I7N Datasheet, PDF (9/42 Pages) Altera Corporation – Cyclone IV Device Datasheet

Chapter 1: Cyclone IV Device Datasheet
1–9
Operating Conditions
The OCT resistance may vary with the variation of temperature and voltage after
calibration at device power-up. Use Table 1–10 and Equation 1–1 to determine the
final OCT resistance considering the variations after calibration at device power-up.
Table 1–10 lists the change percentage of the OCT resistance with voltage and
temperature.
Table 1–10. OCT Variation After Calibration at Device Power-Up for Cyclone IV Devices
Nominal Voltage
dR/dT (%/°C)
dR/dV (%/mV)
3.0
0.262
–0.026
2.5
0.234
–0.039
1.8
0.219
–0.086
1.5
0.199
–0.136
1.2
0.161
–0.288
Equation 1–1. Final OCT Resistance ^{(1), (2), (3), (4), (5), (6)}
R_V = (V₂ – V₁) × 1000 × dR/dV ––––– ⁽⁷⁾
R_T = (T₂ – T₁) × dR/dT ––––– ⁽⁸⁾
For R_x < 0; MF_x = 1/ (|R_x|/100 + 1) ––––– ⁽⁹⁾
For R_x > 0; MF_x = R_x/100 + 1 ––––– ⁽¹⁰⁾
MF = MF_V × MF_T ––––– ⁽¹¹⁾
R_final = R_initial × MF ––––– ⁽¹²⁾
Notes to Equation 1–1:
(1) T₂ is the final temperature.
(2) T₁ is the initial temperature.
(3) MF is multiplication factor.
(4) R_final is final resistance.
(5) R_initial is initial resistance.
(6) Subscript _x refers to both _V and _T.
(7) R_V is a variation of resistance with voltage.
(8) R_T is a 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) V₂ is final voltage.
(12) V₁ is the initial voltage.
December 2013 Altera Corporation
Cyclone IV Device Handbook,
Volume 3