XC3S200A-4VQG100C Datasheet, PDF (69/132 Pages) Xilinx, Inc – Architectural and Configuration Overview

Pinout Descriptions
Package Thermal Characteristics
The power dissipated by an FPGA application has
implications on package selection and system design. The
power consumed by a Spartan-3A FPGA is reported using
either the XPower Power Estimator or the XPower Analyzer
calculator integrated in the Xilinx® ISE® development
software. Table 62 provides the thermal characteristics for
the various Spartan-3A FPGA package offerings. This
information is also available using the Thermal Query tool
on xilinx.com (www.xilinx.com/cgi-bin/thermal/thermal.pl).
The junction-to-case thermal resistance (θ_JC) 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 (θ_JB)
value similarly reports the difference between the board and
junction temperature. The junction-to-ambient (θ_JA) value
reports the temperature difference 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_JA value in a system without a fan. The thermal resistance
drops with increasing air flow.
Table 62: Spartan-3A Package Thermal Characteristics
Package
VQ100
VQG100
TQ144
TQG144
FT256
FTG256
FG320
FGG320
FG400
FGG400
FG484
FGG484
FG676
FGG676
Device
XC3S50A
XC3S200A
XC3S50A
XC3S50A
XC3S200A
XC3S400A
XC3S700A
XC3S1400A
XC3S200A
XC3S400A
XC3S400A
XC3S700A
XC3S700A
XC3S1400A
XC3S1400A
Junction-to-Case
(θ_JC)
12.9
10.9
16.5
16.0
10.3
8.4
7.8
5.4
11.7
9.9
9.8
8.2
7.9
6.0
5.8
Junction-to-
Board (θ_JB)
30.1
25.7
32.0
33.5
23.8
19.3
18.6
14.1
18.5
15.4
15.5
13.0
12.8
9.9
9.4
Junction-to-Ambient (θ_JA)
at Different Air Flows
Still Air
(0 LFM) 250 LFM 500 LFM 750 LFM
48.5
40.4
37.6
36.6
42.9
35.7
33.2
32.4
42.4
36.3
35.8
34.9
42.3
35.6
35.5
34.5
32.7
26.6
26.1
25.2
29.9
24.9
23.0
22.3
28.1
22.3
21.2
20.7
24.2
18.7
17.5
17.0
27.8
22.3
21.1
20.3
25.2
19.8
18.6
17.8
25.6
19.2
18.0
17.3
23.1
17.9
16.7
16.0
22.3
17.4
16.2
15.5
19.5
14.7
13.5
12.8
17.8
13.5
12.4
11.8
Units
°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
DS529-4 (v2.0) August 19, 2010
www.xilinx.com
69