FLEX 10K Embedded Programmable Logic Family Data Sheet
1
Compared to the rest of the device, the embedded array
consumes a negligible amount of power. Therefore, the
embedded array can be ignored when calculating supply
current.
The I
value is calculated with the following equation:
CCACTIVE
µA
--------------------------
×
LC
I
= K × f
× N × tog
CCACTIVE
MAX
MHz × LE
The parameters in this equation are shown below:
f
N
tog
=
=
=
Maximum operating frequency in MHz
Total number of logic cells used in the device
Average percent of logic cells toggling at each clock
(typically 12.5%)
MAX
LC
K
=
Constant, shown in Tables 115 and 116
Table 115. FLEX 10K K Constant Values
Device
K Value
EPF10K10
EPF10K20
EPF10K30
EPF10K40
EPF10K50
EPF10K70
EPF10K100
82
89
88
92
95
85
88
Table 116. FLEX 10KA K Constant Values
Device
K Value
EPF10K10A
EPF10K30A
EPF10K50V
EPF10K100A
EPF10K130V
EPF10K250A
17
17
19
19
22
23
This calculation provides an I estimate based on typical conditions with
CC
no output load. The actual I should be verified during operation
CC
because this measurement is sensitive to the actual pattern in the device
and the environmental operating conditions.
Altera Corporation
119
ALTERA [ ALTERA CORPORATION ]
