1–8
Chapter 1: Cyclone III Device Data Sheet
Electrical Characteristics
lists the OCT calibration accuracy at device power-up.
Table 1–7.
Cyclone III Devices Series OCT with Calibration at Device Power-Up Specifications
Calibration Accuracy
Description
V
CCIO
(V)
Commercial Max
3.0
Series OCT with
calibration at device
power-up
2.5
1.8
1.5
1.2
±10
±10
±10
±10
±10
Industrial and Automotive
Max
±10
±10
±10
±10
±10
Unit
%
%
%
%
%
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 1–8.
Cyclone III Devices OCT Variation After Calibration at Device Power-Up
Nominal Voltage
3.0
2.5
1.8
1.5
1.2
Equation 1–1.
ΔR
V
= (V
2
– V
1
) × 1000 × dR/dV –––––
ΔR
T
= (T
2
– T
1
) × dR/dT –––––
For
ΔR
x
< 0; MF
x
= 1/ (|ΔR
x
|/100 + 1) –––––
For
ΔR
x
> 0; MF
x
=
ΔR
x
/100 + 1 –––––
MF = MF
V
× MF
T
–––––
R
final
= R
initia l
× 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 × refers to both
V
and
T
.
(7)
ΔR
V
is variation of resistance with voltage.
(8)
(9)
(10)
(11)
ΔR
T
is variation of resistance with temperature.
dR/dT is the change percentage of resistance with temperature after calibration at device power-up.
dR/dV is the change percentage of resistance with voltage after calibration at device power-up.
V
2
is final voltage.
dR/dT (%/°C)
0.262
0.234
0.219
0.199
0.161
dR/dV (%/mV)
–0.026
–0.039
–0.086
–0.136
–0.288
(12) V
1
is the initial voltage.
© January 2010
Altera Corporation
ALTERA [ ALTERA CORPORATION ]
