ADM-PCIE-8K5-FH User Manual
2.3 Thermal Performance
The ADM-PCIE-8K5-FH comes with a heat sink to reduce the heat of the FPGA which is typically the hottest
point on the card. The FPGA die temperature must remain under 100 degrees Celsius or the system monitor will
clear the FPGA design to ensure the card does not overheat. To calculate the FPGA die temperature, take your
application power and multiply by Theta JA from the table below, and add your systems internal ambient
temperature. If you are using the fan provided with the board, you will find Theta JA is approximately 1.6 degC/W
for the board.
The power dissipation can be estimated by using the Alpha Data power estimator in conjuction with the Xilinx
Power Estimator (XPE) downloadable at http://www.xilinx.com/products/technology/power/xpe.html. Download
the UltraScale tool and set the Device to Kintex UltraScale, KU115/KU060, FLVA1517, -2, Extended. Set the
ambient temperature to your system ambient and select User Override for the Effective theta JA and enter the
figure associated with your system LFM in the blank field. Proceed to enter all applicable design elements and
utilization in the following spreadsheet tabs. Next aquire the 8K5-FH power estimator from Alpha Data by
contacting [email protected]. You will then plug in the FPGA power figures along with DDR4 and SFP
usage to get an estimated board level power dissipation.
The graph below shows Theta JA of the board with two 3.5 watt QSFP loopback connectors inserted.
Figure 2 : Thermal Performance
2.4 Optional Blower
Because it is possible for generic PC chassis to not provide sufficient airflow to cool the FPGA, the
ADM-PCIE-8K5-FH is shipped with an uninstalled blower. The blower is optional and can be easily installed with
a Philips screw driver at the discretion of the user. Before screwing in the blower, plug in the small power
connector into the right angle connector along the back edge of the board. The blower hangs off the back of the
PCB outside of the PCIe card envelope.
Page 3
PCB Information
ad-ug-1342_v1_0.pdf
