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Partner Directory

Partner Product

Model 71620  (Pentek Inc)
Model 71620 is the first member of the CobaltTM family of high performance XMC modules based on the Xilinx Virtex-6 FPGA. A multichannel, high-speed data converter, it is suitable for connection to HF or IF ports of a communications or radar system. Its built-in data capture and playback features offer an ideal turn-key solution as well as a platform for developing and deploying custom FPGA processing IP. It includes three A/Ds and two D/A converters and four banks of memory. The Model 71620 is compatible with the VITA 42.0 XMC format and supports PCI Express Gen. 2 as a native interface.

Product Highlights

*Complete radar and software radio interface solution * Supports Xilinx Virtex-6 LXT and SXT FPGAs *Three 200 MHz 16-bit A/Ds *One digital upconverter *Two 800 MHz 16-bit D/As *Up to 2 GB of DDR3 SDRAM or 32 MB of QDRII+ SRAM *Sample clock synchronization to an external system reference * LVPECL clock/sync bus for multimodule synchronization *PCI Express (Gen. 1 & 2) interface up to x8 wide *VITA 42.0 XMC compatible with switched fabric interfaces *LVDS connections to the Virtex-6 FPGA for custom I/O

Product Description

A/D Converter Stage

The front end accepts three full scale

analog HF or IF inputs on front panel

SSMC connectors at +8 dBm into 50 ohms

with transformer coupling into three

Texas Instruments ADS5485 200 MHz,

16-bit A/D converters.

The digital outputs are delivered into

the Virtex-6 FPGA for signal processing,

data capture or for routing to other module

resources.



Digital Upconverter and D/A Stage

A TI DAC5688 DUC (digital upconverter)

and D/A accepts a baseband real or complex

data stream from the FPGA and provides

that input to the upconvert, interpolate and

dual D/A stages.

When operating as a DUC, it interpolates

and translates real or complex baseband

input signals to any IF center frequency up

to 360 MHz. It delivers real or quadrature

(I+Q) analog outputs to the dual 16-bit D/A

converter. Analog output is through a pair

of front panel SSMC connectors.

If translation is disabled, the DAC5688

acts as a dual interpolating 16-bit D/A with

output sampling rates up to 800 MHz. In

both modes the DAC5688 provides interpolation

factors of 2x, 4x and 8x.



Xilinx Virtex-6 FPGA



The Model 71620 Cobalt architecture

features a Virtex-6 FPGA. All of the board’s

data and control paths are accessible by the

FPGA, enabling factory installed functions

including data multiplexing, channel selection,

data packing, gating, triggering and

memory control. In addition to the built-in

functions, users can install their own custom

IP for data processing. Pentek

GateFlow FPGA Design Kits facilitate integration

of user-created IP with the factory

shipped functions.

The FPGA serves as a control and status

engine with data and programming interfaces

to each of the on-board resources

including the data converters, DDR3

SDRAM or QDRII+ SRAM memory, PCIe

interface, programmable LVDS I/O and

clock, gate, and synchronization circuits.

The FPGA can be populated with a variety

of different FPGAs to match the specific requirements of the processing task.



Clocking and Synchronization

Two internal timing buses provide either

a single clock or two different clock

rates to the A/D and D/A signal paths.

Each timing bus includes a clock, sync

and a gate or trigger signal. An on-board

clock generator receives an external sample

clock from the front panel SSMC connector.

This clock can be used directly for either

the A/D or D/A sections or can be divided

by a built-in clock synthesizer circuit to provide

different A/D and D/A clocks. In an

alternate mode, the sample clock can be

sourced from an onboard programmable

voltage-controlled crystal oscillator. In this

mode, the front panel SSMC connector can

be used to provide a 10 MHz reference

clock for synchronizing the internal oscillator.

A front panel 26-pin LVPECL Clock/

Sync connector allows multiple modules to

be synchronized. In the slave mode, it accepts

LVPECL inputs that drive the clock,

sync and gate signals. In the master mode,

the LVPECL bus can drive the timing signals

for synchronizing multiple modules.

Multiple 71620s can be driven from the

LVPECL bus master, supporting synchronous

sampling and sync functions across

all connected boards.



Intelligent DMA Engine

All memory banks are supported with

DMA engines for easily moving data through

the PCIe interface. For each transfer, the

DMA engine can automatically construct

metadata packets containing channel ID, a

sample-accurate timestamp and data

length information. These actions simplify

the host processor’s job of identifying and

executing on the data.



PCI Express Interface

The Model 71620 includes an industrystandard

interface fully compliant with PCI

Express Gen. 1 & 2 bus specifications. The

x8 lane interface includes multiple DMA

controllers for efficient transfers to and

from the module.

Web Links

http://www.pentek.com/products/detail.cfm?model=71620
http://www.pentek.com/products/detail.cfm?model=71620
http://www.pentek.com/products/detail.cfm?model=71620

More Information

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