EP3C5_1 Datasheet, PDF (8/34 Pages) Altera Corporation – Cyclone III Device Data Sheet

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
Description
Series OCT with
calibration at device
power-up
Calibration Accuracy
V_CCIO (V)
Commercial Max
Industrial and Automotive
Max
Unit
3.0
±10
±10
%
2.5
±10
±10
%
1.8
±10
±10
%
1.5
±10
±10
%
1.2
±10
±10
%
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
3.0
2.5
1.8
1.5
1.2
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
Equation 1–1. (Note 1), (2), (3), (4), (5), (6)
ΔRV = (V2 – V1) × 1000 × dR/dV ––––– (7)
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) 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) ΔR_T 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