Fast A/D sampler characterization presentation
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Transcript of Fast A/D sampler characterization presentation
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FAST A/D SAMPLER
CHARACTERIZATION PRESENTATION
Performed By: Tal Goihman & Irit Kaufman
Instructor: Mony Orbach
Bi-semesterial
Spring 2011
07/04/2011
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Introduction
Goal: implement a fast A/D sampler up to 5Gsps.
Input options:Single channel @ 5GspsDual channel @ 2.5GspsQuad channel @ 1.25Gsps
Output - Sampled data available on:ML605 On-board DDR3PC Memory & file system - through PCI-E
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Hardware Components
A/D Sampler (FMC125)
Virtex6 Development Board (ML605)
PC
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Simplified Block Diagram
A/D Sampler
Memory Controller DDR3 PCI-E
ControllerPC
Software
Semester A
Semester B
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A/D Sampler
The FMC125 is a Quad-Channel ADC that provides four 8-bit ADC channels enabling simultaneous sampling of 1, 2, or 4 channels @ 5 , 2.5 , 1.25Gsps respectively. Controlled via SPI. Uses the EV8AQ160 chip from e2v Features:
Selectable analog input range (500mVpp / 625mVpp) Selectable input bandwidth (0.5 , 0.6 , 1.5 , 2 GHz) Individual Gain, Offset & Phase controls > 60dB channel isolation
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Memory Controller & Memory
Standard Xilinx MIG implementation for DDR3 Memory Controller.
Performance (on ML605)800 MT/s64-bit wide interface= 6.25 GB/s theoretical throughput
ML605 comes with a 512MB DDR3 SODIMM, Expandable up to a 2GB module
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PCI-Express Block
Xilinx IP available ML605 can be connected to a PC using
PCI-E as:8 lane PCI-E Gen1 (250MB/sec/lane)4 lane PCI-E Gen2 (500MB/sec/lane)Both operate at maximum 2GB/s total
Implemented at Part 2 of the project.
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PC software Block Read sampled data from PCI-E to memory
and disk. Control Sampling Start / Stop. Control some system parameters
Configuration of A/D channelsSample rateSampled data size…
Implemented at Part 2 of the project.
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Sampling process
All Data is read from
memory and transferred to PC via PCI-E
Data is sampled & written to
memory until the memory
is filled.
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Timeline
WW 15
• MIG Familiarization / study
WW 16 + 17
• MIG functionality demonstration
WW 18
• FMC125 Familiarization / study
WW 19 + 20
• FMC125 functionality demonstration
WW 21
• Middle of semester presentation
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QUESTIONS?THANKS
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Backup
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