Chapter 1: Cyclone IV Device Datasheet
1–9
Operating Conditions
December 2016
Altera Corporation
The OCT resistance may vary with the variation of temperature and voltage after
calibration at device power-up. Use
and
to determine the
final OCT resistance considering the variations after calibration at device power-up.
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
:
(1) This specification is not applicable to EP4CGX15, EP4CGX22, and EP4CGX30 devices.
Equation 1–1. Final OCT Resistance
,
,
,
,
R
V
= (V
2
– V
1
) × 1000 × dR/dV –––––
R
T
= (T
2
– T
1
) × dR/dT –––––
For
R
x
< 0; MF
x
= 1/ (|
R
x
For
R
x
> 0; MF
x
=
R
x
/100 + 1 –––––
MF = MF
V
× MF
T
–––––
R
final
= R
initial
× MF –––––
Notes to
(1) T
2
is the final temperature.
(2) T
1
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) V
2
is final voltage.
(12) V
1
is the initial voltage.
Содержание Cyclone IV
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