MAX 3000A Programmable Logic Device Family Data Sheet
Supply power (P) versus frequency (fMAX, in MHz) for MAX 3000A
devices is calculated with the following equation:
Power
Consumption
P = PINT + PIO = ICCINT × VCC + PIO
The PIO value, which depends on the device output load characteristics
and switching frequency, can be calculated using the guidelines given in
Application Note 74 (Evaluating Power for Altera Devices).
The ICCINT value depends on the switching frequency and the application
logic. The ICCINT value is calculated with the following equation:
ICCINT
=
(A × MCTON) + [B × (MCDEV – MCTON)] + (C × MCUSED × fMAX × togLC
)
The parameters in the ICCINT equation are:
MCTON
=
Number of macrocells with the Turbo BitTM option turned
on, as reported in the Quartus II or MAX+PLUS II Report
File (.rpt)
MCDEV
MCUSED
=
=
Number of macrocells in the device
Total number of macrocells in the design, as reported in
the RPT File
fMAX
togLC
=
=
Highest clock frequency to the device
Average percentage of logic cells toggling at each clock
(typically 12.5%)
A, B, C
=
Constants (shown in Table 26)
Table 26. MAX 3000A ICC Equation Constants
Device
A
B
C
EPM3032A
EPM3064A
EPM3128A
EPM3256A
EPM3512A
0.71
0.71
0.71
0.71
0.71
0.30
0.30
0.30
0.30
0.30
0.014
0.014
0.014
0.014
0.014
The ICCINT calculation provides an ICC estimate based on typical
conditions using a pattern of a 16–bit, loadable, enabled, up/down
counter in each LAB with no output load. Actual ICC should be verified
during operation because this measurement is sensitive to the actual
pattern in the device and the environmental operating conditions.
Figures 12 and 13 show the typical supply current versus frequency for
MAX 3000A devices.
Altera Corporation
39
INTEL [ INTEL ]
