1–8
Chapter 1: Cyclone III Device Data Sheet
Electrical Characteristics
Table 1–7 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)
Unit
Industrial and Automotive
Max
Commercial Max
3.0
2.5
1.8
1.5
1.2
10
10
10
10
10
10
10
10
10
10
%
%
%
%
%
Series OCT with
calibration at device
power-up
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
Equation 1–1. (Note 1), (2), (3), (4), (5), (6)
ΔRV = (V – V1) × 1000 × dR/dV ––––– (7)
2
ΔRT = (T2 – T1) × dR/dT ––––– (8)
For ΔRx < 0; MFx = 1/ (|ΔRx|/100 + 1) ––––– (9)
For ΔRx > 0; MFx = ΔRx/100 + 1 ––––– (10)
MF = MFV × MFT ––––– (11)
Rfinal = Rinitial × 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) Rfinal is final resistance.
(5) Rinitial is initial resistance.
(6) Subscript × refers to both V and T.
(7) ΔRV is variation of resistance with voltage.
(8) ΔRT is 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.
Cyclone III Device Handbook, Volume 2
© January 2010 Altera Corporation
ALTERA [ ALTERA CORPORATION ]
