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This version (14 Oct 2016 15:03) was approved by LucianS.The Previously approved version (25 Mar 2014 21:28) is available.Diff

AD-FMCOMMS3-EBZ Hardware

Downloads

This is the latest, greatest and production worthy Rev “A” of this board (Although it indicates “A”, this is not the first version, and there is no Rev B planned). Note that the RF transformers used as baluns on the Rev A board are Mini Circuits TCM1-63AX+. They are rated for a operating frequency between 10 MHz and 6 GHz.

I/O Voltage

The AD-FMComms3 (AD9361) assumes a VDD_INTERFACE voltage between 1.71V and 2.625V (1.8 to 2.5 +/- 5%), so on your FPGA carrier board, you should ensure that VADJ is between these levels. Setting things to 3.3V will damage the part.

Picture and Main components

Outline

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 FMC cutout for the bezel is missing (so we could space the SMA connectors out as far as possible, and achieve maximum isolation between the channels.
  • The mounting holes near the end of the board with the connectors is also in the wrong place (so it didn't effect the RF path between the connectors and the AD9361.
  • The FMC height specification on the top side of the board is violated to put some 90 degree SMA connectors.

Size

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.

Layers

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

resources/eval/user-guides/ad-fmcomms3-ebz/hardware.txt · Last modified: 14 Oct 2016 15:03 by LucianS

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