I have a fully working design using the ADV7180BCPZ as a single channel of composite NTSC video input only.This ADV7180BCPZ is interfaced to the BF527 BlackFin via the 8-bit PPI interface.The design works perfectly at room temperature. However, when the product is tested below -30*C, the video loses its color but there is no lost of cync. This very designed/product/board has passed the -55*C test in the past and there has been no changes made. We are seeing this problem with this new batch of boards. I am attaching the screen capture of the good and bad video files as well as a sanitized copy of the schematic.
- removed all ESD front-end protections to insure that none of them is contributing to the failure
- removed the board connector and wired the video coax directly to the board.
- conformal coated the whole circuit to rule-out condensation