Lattice reference designs offer FPGA-ADC interface -

Lattice reference designs offer FPGA-ADC interface


Portland, Ore. – New FPGA reference designs have has just been released by Lattice Semiconductor supporting the Texas Instruments' ADS6000 family of analog-to-digital converters (ADCs).

LatticeECP2/M FPGAs provide a high-speed glueless interface capable of acquiring 14-bit ADC data at rates up to 120 MSPS from the two to four serial channels found in ADS6000 ADC family devices.

Systems migrating to higher sample rate/resolution ADCs often require an FPGA with an interface speed of approximately 800 Mbps to bridge between existing hardware and the newer interface provided by the higher speed ADC. Previously, only more expensive, high-end FPGAs could satisfy this requirement.

The new LatticeECP2/M FPGA family is able to provide these bridge functions in an optimally sized FPGA at a significantly lower cost by processing the ADC data within the FPGA and routing it to other parts of their system without having toworry about the timing details of high-speed ADC interfaces.

To facilitate design verification, the default configuration of the reference design utilizes a new hardware interface card developed by Lattice to work with existing TI and Lattice evaluation boards.

The ADS6000 family consists of dual and quad, 12- and 14-bit ADCs available in speeds of 65, 80, 105 and 125 MSPS. Each device in the family deliversexceptional spurious-free dynamic range (SFDR), high signal-to-noise ratio (SNR), high IF capability, and low power per channel.

The LatticeECP2/M family supports logic densities from 6K LUTs up to 95K LUTs, has high performance DSP blocks, supports DDR2 memory interfaces at 533 Mbps and up to 840 Mbps generic LVDS performance.

The TI ADC interface card, available immediately from the Lattice website, enables the interfacing of the ADS6425EVM evaluation board directly withthe LatticeECP2 advanced evaluation board. The reference design uses about 5% of the FPGA logic to transfer the ADC codes on the serial source synchronous bus to its embedded block RAM memory.

The interface card, LFE2-H-IC-EV, is available immediately for sale on the Lattice website at a suggested price of $195. The LatticeECP2 Advanced Evaluation board and ADS6425EVM boards are available now from Latticeand TI, respectively.

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