Altera Cyclone IV Device Handbook page 455

Chapter 1: Cyclone IV Device Datasheet
Operating Conditions
The OCT resistance may vary with the variation of temperature and voltage after
calibration at device power-up. Use
final OCT resistance considering the variations after calibration at device power-up.
Table 1–10
temperature.
Table 1–10. OCT Variation After Calibration at Device Power
Note to
(1) This specification is not applicable to EP4CGX15, EP4CGX22, and EP4CGX30 devices.
Equation 1–1. Final OCT Resistance
R
V
R
T
For R
For R
MF = MF
R
final
Notes to
(1) T
(2) T
(3) MF is multiplication factor.
(4) R
(5) R
(6) Subscript
(7) R
(8) R
(9) dR/dT is the change percentage of resistance with temperature after calibration at device power
(10) dR/dV is the change percentage of resistance with voltage after calibration at device power
(11) V
(12) V
December 2016 Altera Corporation
lists the change percentage of the OCT resistance with voltage and
Nominal Voltage
3.0
2.5
1.8
1.5
1.2
Table 1–10:
= (V – V ) × 1000 × dR/dV –––––
2 1
(8)
= (T – T ) × dR/dT –––––
2 1
< 0; MF = 1/ (|R |/100 + 1) –––––
x x x
= R
> 0; MF /100 + 1 –––––
x x x
(11)
× MF –––––
V T
(12)
= R × MF –––––
initial
Equation 1–1:
is the final temperature.
2
is the initial temperature.
1
is final resistance.
final
is initial resistance.
initial
refers to both and .
x V T
is a variation of resistance with voltage.
V
is a variation of resistance with temperature.
T
is final voltage.
2
is the initial voltage.
1
Table 1–10 and Equation 1–1
- Up for Cyclone IV Devices
dR/dT (%/°C)
0.262
0.234
0.219
0.199
0.161
(1), (2), (3), (4), (5), (6)
(7)
(9)
(10)
1–9
to determine the
(1)
dR/dV (%/mV)
–0.026
–0.039
–0.086
–0.136
–0.288
-
up.
-
up.
Cyclone IV Device Handbook,
Volume 3