FAST A/D SAMPLER

CHARACTERIZATION PRESENTATION

Performed By: Tal Goihman & Irit Kaufman

Instructor: Mony Orbach

Bi-semesterial

Spring 2011

07/04/2011

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

Hardware Components

A/D Sampler (FMC125)

Virtex6 Development Board (ML605)

PC

Simplified Block Diagram

A/D Sampler

Memory Controller DDR3 PCI-E

ControllerPC

Software

Semester A

Semester B

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

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

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.

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.

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.

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

QUESTIONS?THANKS

Backup

Documantaion