Power Consumption
Table 4–42. Arria GX Device Capacitance Note (1) (Part 2 of 2)
Symbol
Parameter
Typical
Unit
COUTFB
Input capacitance on dual-purpose clock output/feedback pins in PLL
banks 11 and 12.
6.7
pF
Note to Table 4–42:
(1) Capacitance is sample-tested only. Capacitance is measured using time-domain reflections (TDR). Measurement
accuracy is within 0.5 pF.
Altera offers two ways to calculate power for a design: the Excel-based
PowerPlay early power estimator power calculator and the Quartus II
PowerPlay power analyzer feature.
Power
Consumption
The interactive Excel-based PowerPlay Early Power Estimator is typically
used prior to designing the FPGA in order to get an estimate of device
power. The Quartus II PowerPlay Power Analyzer provides better quality
estimates based on the specifics of the design after place-and-route is
complete. The power analyzer can apply a combination of user-entered,
simulation-derived and estimated signal activities which, combined with
detailed circuit models, can yield very accurate power estimates.
In both cases, these calculations should only be used as an estimation of
power, not as a specification.
f
For more information on PowerPlay tools, refer to the PowerPlay Early
Power Estimator and PowerPlay Power Analyzer paper and the PowerPlay
Power Analysis chapter in volume 3 of the Quartus II Handbook.
The PowerPlay early power estimator is available on the Altera web site
at www.altera. com. See Table 4–14 on page 18 for typical ICC standby
specifications.
The DirectDrive technology and MultiTrack interconnect ensures
predictable performance, accurate simulation, and accurate timing
analysis across all Arria GX device densities and speed grades. This
section describes and specifies the performance of I/Os.
I/O Timing
Model
All specifications are representative of worst-case supply voltage and
junction temperature conditions.
1
The timing numbers listed in the tables of this section are
extracted from the Quartus II software, version 7.1.
4–34
Altera Corporation
May 2008
Arria GX Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
