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The AD9083 is a 16-bit, 16 channel with 125 MHz bandwidth per channel (2 GSPS total) analog-to-digital converter (ADC) featuring an on-chip programmable, single-pole antialiasing filter and termination resistor that is designed for low power, small size, and ease of use.
The dual ADC cores feature a multistage, differential pipelined architecture with integrated output error correction logic. Each ADC features wide bandwidth inputs supporting a variety of user-selectable input ranges.
The AD9083-FMC reference design is a processor based (e.g. Microblaze) embedded system. The design consists of a receive chain.
The receive chain transports the captured samples from ADC to the system memory (DDR). Before transferring the data to DDR the samples are stored in a 33Mbit buffer implemented on block rams from the FPGA fabric (util_adc_fifo) or 65k samples per channel.
All cores from the receive chain are programmable through an AXI-Lite interface.
The data path and clock domains are depicted on the below diagram:
The design has one JESD receive chain with 4 lanes at rate of 10Gbps. The JESD receive chain consists of a physical layer represented by an XCVR module, a link layer represented by an RX JESD LINK module and transport layer represented by a RX JESD TPL module. The links operate in Subclass 0 since it is not using the SYSREF signal.
Both links are set for full bandwidth mode and operate with the following parameters:
Deframer paramaters: L=4, M=16, F=8, S=1, N’=16
GTREFCLK – 500MHz
LINKCLK(Lane Rate/40) – 250MHz
DEVICECLK - 125 MHz
ADCCLK – 2000MHz
JESD204B Lane Rate – 10Gbps
Beacause of the F=8 parameter the JESD Link IP will have different input and output frequencies and bus widths. Data will enter the IP on 4 32bit wide channels (128b) at 250MHz (link clock) and will exit on a 256bit interface clocked at 125MHz (device clock). The transport layer component presents on its output 256 bits at once on every clock cycle, representing 1 sample per converter. The receive chain is then transferred to the DDR using a DMA.
ADI does not distribute the bit/elf files of these projects so they must be built from the sources available here. To get the source you must clone the HDL repository. Then go to the /projects/ad9083_fmc/zcu102 location and run the make command by typing in your command prompt:
user@analog:~$ cd hdl/projects/ad9083_fmc/zcu102 user@analog:~/hdl/projects/ad9083_fmc/zcu102$ make
A more comprehensive build guide can be found in the HDL User Guide.
Analog Devices will provide limited online support for anyone using the reference design with Analog Devices components via the EngineerZone.