This is an old revision of the document!
This is the latest and greatest Rev “A” of this board, and is ready for production. Note that the Transfomers on the Rev D board are Mini Circuits TCM1-63AX+. They are rated for a operating frequency between 10 MHz and 6 GHz.
For those that don't want to load up the Allegro viewer, here is a basic outline/component placements of the board. While this board does meet parts of the VITA-57.1 (FMC) specifications, there are many things it violates, and is not designed to be a form/fit/function board.
The size of the board (not including the SMA connectors, which project beyond the edge of the board) is 73.3mm x 69mm. This is under the FMC specifications of 84mm x 69mm). The mounting holes are not compliant with the FMC standard, and are shown below.
The AD-FMCOMMS3-EBZ is a 10 layer board.
Design Cross Section
Subclass Name | Type | Material | Thickness (MIL) | Conductivity (mho/cm) | Dielectric Constant | Loss Tangent | Shield | Width (MIL) |
---|---|---|---|---|---|---|---|---|
SURFACE | AIR | 0 | 1 | 0 | ||||
TOP | CONDUCTOR | COPPER | 2.025 | 595900 | 1 | 0 | 8.00 | |
DIELECTRIC | FR-4 | 8 | 0 | 3.38 | 0.035 | |||
L2_GND | PLANE | COPPER | 1.35 | 595900 | 1 | 0.035 | Y | |
DIELECTRIC | BT_EPOXY | 3 | 0 | 4.10 | 0.02 | |||
L3_PWR | PLANE | COPPER | 1.35 | 595900 | 1 | 0.035 | Y | |
DIELECTRIC | FR-4 | 3 | 0 | 4.10 | 0.035 | |||
L4_GND | PLANE | COPPER | 1.35 | 595900 | 1 | 0.035 | Y | |
DIELECTRIC | BT_EPOXY | 4.60 | 0 | 4.10 | 0.02 | |||
L5_SIG | CONDUCTOR | COPPER | 1.35 | 595900 | 1 | 0.035 | 3.80 | |
DIELECTRIC | FR-4 | 8 | 0 | 4.10 | 0.035 | |||
L6_SIG | CONDUCTOR | COPPER | 1.35 | 595900 | 1 | 0.035 | 3.80 | |
DIELECTRIC | BT_EPOXY | 4.60 | 0 | 4.10 | 0.02 | |||
L7_GND | PLANE | COPPER | 1.35 | 595900 | 1 | 0.035 | Y | |
DIELECTRIC | FR-4 | 3 | 0 | 4.10 | 0.035 | |||
L8_PWR | PLANE | COPPER | 1.35 | 595900 | 1 | 0.035 | Y | |
DIELECTRIC | BT_EPOXY | 3 | 0 | 4.10 | 0.02 | |||
L9_GND | PLANE | COPPER | 1.35 | 595900 | 1 | 0.035 | Y | |
DIELECTRIC | FR-4 | 8 | 0 | 3.38 | 0.035 | |||
BOTTOM | CONDUCTOR | COPPER | 2.025 | 595900 | 1 | 0 | 8.00 | |
SURFACE | AIR | 0 | 1 | 0 |