A3PE1500-1FG896 ACTEL [Actel Corporation], A3PE1500-1FG896 Datasheet - Page 17
A3PE1500-1FG896
Manufacturer Part Number
A3PE1500-1FG896
Description
ProASIC3E Flash Family FPGAs
Manufacturer
ACTEL [Actel Corporation]
Datasheet
1.A3PE1500-1FG896.pdf
(152 pages)
- Current page: 17 of 152
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Table 2-5 •
Table 2-6 •
Package Type
Plastic Quad Flat Package (PQFP)
Plastic Quad Flat Package (PQFP) with
embedded heat spreader
Fine Pitch Ball Grid Array (FBGA)
Array Voltage
Maximum Power Allowed
V
1.425
1.500
1.575
CC
(V)
Thermal Characteristics
Introduction
The temperature variable in Actel Designer software refers to the junction temperature, not the
ambient temperature. This is an important distinction because dynamic and static power
consumption cause the chip junction to be higher than the ambient temperature.
EQ 2-1
where:
T
ΔT = Temperature gradient between junction (silicon) and ambient ΔT = θ
θ
P = Power dissipation
Package Thermal Characteristics
The device junction-to-case thermal resistivity is θ
resistivity is θ
maximum junction temperature is 110°C.
maximum power dissipation allowed for an 896-pin FBGA package at commercial temperature and
in still air.
Temperature and Voltage Derating Factors
Package Thermal Resistivities
Temperature and Voltage Derating Factors for Timing Delays
(normalized to T
A
ja
= Ambient Temperature
= Junction-to-ambient of the package. θ
T
J
= Junction Temperature = ΔT + T
can be used to calculate junction temperature.
–40°C
0.87
0.83
0.80
ja
=
. The thermal characteristics for θ
Max. junction temp. (°C) Max. ambient temp. (°C)
-------------------------------------------------------------------------------------------------------------------------------------- -
J
= 70°C, V
0.92
0.88
0.85
0°C
Pin Count
CC
= 1.425 V)
208
208
256
484
676
896
A
θ
ja
Junction Temperature (°C)
(°C/W)
25°C
0.95
0.90
0.87
v1.2
–
8.0
3.8
3.8
3.2
3.2
2.4
θ
ja
jc
EQ 2-2
numbers are located in
ja
are shown for two air flow rates. The absolute
Still Air
shows a sample calculation of the absolute
26.1
16.2
26.9
20.5
16.4
13.6
jc
and the junction-to-ambient air thermal
70°C
1.00
0.95
0.92
ProASIC3E DC and Switching Characteristics
200 ft./min.
22.5
13.3
22.8
17.0
13.0
10.4
=
110°C 70°C
------------------------------------
Table
θ
ja
13.6°C/W
85°C
1.02
0.97
0.94
ja
2-5.
–
* P
500 ft./min.
11.9
21.5
15.9
12.0
20.8
9.4
=
5.88 W
100°C
1.05
1.00
0.96
Units
EQ 2-1
EQ 2-2
C/W
C/W
C/W
C/W
C/W
C/W
2 - 5
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