参数资料
型号: A3PN250-1VQ100
厂商: Microsemi SoC
文件页数: 26/114页
文件大小: 0K
描述: IC FPGA NANO 250K GATES 100-VQFP
标准包装: 90
系列: ProASIC3 nano
RAM 位总计: 36864
输入/输出数: 68
门数: 250000
电源电压: 1.425 V ~ 1.575 V
安装类型: 表面贴装
工作温度: 0°C ~ 70°C
封装/外壳: 100-TQFP
供应商设备封装: 100-VQFP(14x14)
ProASIC3 nano Flash FPGAs
Revision 11
2-5
Thermal Characteristics
Introduction
The temperature variable in the 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 1 can be used to calculate junction temperature.
TJ = Junction Temperature = T + TA
EQ 1
where:
TA = Ambient Temperature
T = Temperature gradient between junction (silicon) and ambient T = ja * P
ja = Junction-to-ambient of the package. ja numbers are located in Table 2-5.
P = Power dissipation
Package Thermal Characteristics
The device junction-to-case thermal resistivity is
jc and the junction-to-ambient air thermal resistivity is
ja. The thermal characteristics for ja are shown for two air flow rates. The absolute maximum junction
temperature is 100°C. EQ 2 shows a sample calculation of the absolute maximum power dissipation
allowed for a 484-pin FBGA package at commercial temperature and in still air.
EQ 2
Temperature and Voltage Derating Factors
Maximum Power Allowed
Max. junction temp. (
C) Max. ambient temp. (C)
ja(C/W)
------------------------------------------------------------------------------------------------------------------------------------------
100
C70C
20.5
C/W
-------------------------------------
1.463 W
=
Table 2-5 Package Thermal Resistivities
Package Type
Device
Pin Count
jc
ja
Units
Still Air 200 ft./min.
500 ft./min.
Quad Flat No Lead (QFN)
All devices
48
TBD
C/W
68
TBD
C/W
100
TBD
C/W
Very Thin Quad Flat Pack (VQFP)
All devices
100
10.0
35.3
29.4
27.1
C/W
Table 2-6 Temperature and Voltage Derating Factors for Timing Delays
(normalized to TJ = 70°C, VCC = 1.425 V)
Array Voltage VCC (V)
Junction Temperature (°C)
–40°C
–20°C
0°C
25°C
70°C
85°C
100°C
1.425
0.968
0.973
0.979
0.991
1.000
1.006
1.013
1.500
0.888
0.894
0.899
0.910
0.919
0.924
0.930
1.575
0.836
0.841
0.845
0.856
0.864
0.870
0.875
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