Spartan-3E FPGA Family: Pinout Descriptions
package body (case) and the die junction temperature per
Package Thermal Characteristics
watt of power consumption. The junction-to-board (θ )
JB
The power dissipated by an FPGA application has
implications on package selection and system design. The
power consumed by a Spartan-3E FPGA is reported using
either the XPower Estimator or the XPower Analyzer
calculator integrated in the Xilinx ISE® development
software. Table 129 provides the thermal characteristics for
the various Spartan-3E package offerings.
value similarly reports the difference between the board and
junction temperature. The junction-to-ambient (θ ) value
JA
reports the temperature difference per watt between the
ambient environment and the junction temperature. The θ
JA
value is reported at different air velocities, measured in
linear feet per minute (LFM). The Still Air (0 LFM) column
shows the θ value in a system without a fan. The thermal
JA
resistance drops with increasing air flow.
The junction-to-case thermal resistance (θ ) indicates the
JC
difference between the temperature measured on the
Table 129: Spartan-3E Package Thermal Characteristics
Junction-to-Ambient (θJA
)
at Different Air Flows
Junction-to-Case Junction-to-Board
Device
Package
Units
(θJC
)
(θJB)
Still Air
(0 LFM)
250 LFM
500 LFM
750 LFM
XC3S100E
XC3S250E
XC3S500E
XC3S100E
XC3S250E
XC3S500E
XC3S100E
XC3S250E
XC3S250E
XC3S500E
XC3S250E
XC3S500E
XC3S1200E
XC3S500E
XC3S1200E
XC3S1600E
XC3S1200E
XC3S1600E
XC3S1600E
13.0
11.0
9.8
30.9
25.9
49.0
43.3
40.0
62.1
48.3
41.5
52.1
37.6
37.0
36.1
35.8
31.1
26.2
26.1
23.0
21.1
22.3
20.3
18.8
40.7
36.0
33.3
55.3
41.8
35.2
40.5
29.2
27.3
26.6
29.3
25.0
20.5
20.6
17.7
15.9
17.2
15.2
12.5
37.9
33.6
31.0
52.8
39.5
32.9
34.6
25.0
24.1
23.6
28.4
24.0
19.3
19.4
16.4
14.6
16.0
14.0
11.3
37.0
32.7
30.2
51.2
38.0
31.5
32.5
23.4
22.4
21.8
28.1
23.6
18.9
18.6
15.7
13.8
15.3
13.3
10.8
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
VQ100
CP132
19.3
11.8
8.5
42.0
28.1
21.3
31.9
25.7
29.0
26.8
27.7
22.2
16.4
15.6
12.5
10.6
12.4
10.4
9.4
8.2
TQ144
PQ208
7.2
9.8
8.5
12.4
9.6
FT256
FG320
6.5
9.8
8.2
7.1
7.5
FG400
FG484
6.0
5.7
DS312 (v4.2) December 14, 2018
www.xilinx.com
Product Specification
162
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