BGA484 image display chip fixture

. Actual requirements:

1.Package: BGA package

2. Number of Pins: 484

3. Number of grounding connections: 0pin

4. Chip type: FPGA

5. Test requirements: chip function test

3. Demand analysis: The BGA484 test socket needs to support the performance of the chip. The core working frequency of the chip is 333 MHz. It is designed according to 500 MHz to ensure stability. The maximum voltage is 3.3V, the power supply is less than 500mA/pin, and the I/O of the FPGA There are many ports, and there may be other requirements during design expansion, so it is necessary to communicate with the user. This fixture does not have other high-frequency, high-speed, high-voltage and large-current requirements, so the test socket can be designed according to the above performance. The performance requirements are not high, so you can use conventional probes to adapt. What needs to be noted here is that for FPGA-type chips, you don’t actually need to install all 484 pins. Some of its I/O ports do not need to be used, but If it is for debugging or performance development, it is still recommended to download all pins. After all, there may be expansion needs in the future;

4. Production: The BGA484 test socket must support the size of the chip. The chip size is 21*21*2.36mm. According to the shape of the chip, the corresponding test socket pressure block profiling and limit design must be designed; the BGA484 test socket needs to be able to Complete the installation to the test motherboard. Based on the light drawing file provided by the test board and the actual test version, 3D simulation design is performed, and the corresponding avoidance design file and the module file of the external structure test seat limiter are formed to complete the entire structural design of the test seat. and positioning;

5. After the production is completed, quality inspection of all sizes of the test socket will be carried out. At the same time, a power-on test will be carried out to confirm whether the product is OK. After the power-on video is taken and sent to the user for confirmation, it can be shipped.