R
Spartan-II FPGA Family: Pinout Tables
value similarly reports the difference between the board and
junction temperature. The junction-to-ambient (θJA) value
reports the temperature difference between the ambient
environment and the junction temperature. The θJA value is
reported at different air velocities, measured in linear feet
per minute (LFM). The “Still Air (0 LFM)” column shows the
Package Thermal Characteristics
Table 39 provides the thermal characteristics for the various
Spartan-II FPGA package offerings. This information is also
available using the Thermal Query tool on xilinx.com
(www.xilinx.com/cgi-bin/thermal/thermal.pl).
θ
JA value in a system without a fan. The thermal resistance
drops with increasing air flow.
The junction-to-case thermal resistance (θJC) indicates the
difference between the temperature measured on the
package body (case) and the die junction temperature per
watt of power consumption. The junction-to-board (θJB)
Table 39: Spartan-II Package Thermal Characteristics
Junction-to-Ambient (θ
)
JA
at Different Air Flows
Junction-to-Case
(θ
Junction-to-
Still Air
(0 LFM)
Package
Device
XC2S15
XC2S30
XC2S15
XC2S30
XC2S50
XC2S100
)
Board (θ
)
250 LFM
36.7
500 LFM
34.2
750 LFM
33.3
Units
JC
JB
11.3
10.1
7.3
N/A
44.1
40.7
38.6
34.7
32.2
31.4
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
VQ100
VQG100
N/A
33.9
31.5
30.8
N/A
30.0
25.7
24.1
6.7
N/A
27.0
23.1
21.7
TQ144
TQG144
5.8
N/A
25.1
21.4
20.1
5.3
N/A
24.4
20.9
19.6
CS144
CSG144
XC2S30
2.8
N/A
34.0
26.0
23.9
23.2
°C/Watt
XC2S50
XC2S100
XC2S150
XC2S200
XC2S50
6.7
5.9
5.0
4.1
7.1
5.8
4.6
3.5
2.0
2.0
N/A
N/A
N/A
N/A
17.6
15.1
12.7
10.7
N/A
N/A
25.2
24.6
23.8
23.0
27.2
25.1
23.0
21.4
21.9
21.0
18.6
18.1
17.6
17.0
21.4
19.5
17.6
16.1
17.3
16.6
16.4
16.0
15.6
15.0
20.3
18.3
16.3
14.7
15.8
15.1
15.2
14.9
14.4
13.9
19.8
17.8
15.8
14.2
15.2
14.5
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
PQ208
PQG208
XC2S100
XC2S150
XC2S200
XC2S150
XC2S200
FG256
FGG256
FG456
FGG456
DS001-4 (v2.8) June 13, 2008
Product Specification
www.xilinx.com
Module 4 of 4
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