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1
Introduction
The LM97937EVM is an evaluation board used to evaluate the LM97937 analog-to-digital converter (ADC)
from TI. The LM97937 device is a dual-channel, 9-bit ADC with SNRBoost and Bit-Burst signal processing
capable of operating at sampling rates up to 370 Mega samples per second (MSPS). The LM97937
device output data is transmitted over a standard JESD204B high-speed serial interface.
This evaluation board also includes the following important features:
•
Transformer-coupled signal input network allowing a single-ended signal source from 5 MHz to 1 GHz
•
LMK04828 system clock generator that generates FPGA reference clocks for the high-speed serial
interface and may be used to generate the ADC sampling clock
•
Transformer-coupled clock input network to test the ADC performance with a very low-noise clock
source
•
High-speed serial data output over a standard FMC interface connector
•
Device register programming via USB connector and FTDI USB-to-SPI bus translator
The digital data from the LM97937EVM board can be quickly and easily captured with the TSW14J56EVM
data capture board. The TSW14J56EVM captures the high-speed serial data, decodes the data, stores
the data in memory, then uploads it to a connected PC through a USB interface for analysis. The High
Speed Data Converter Pro (HSDC Pro) software on the PC communicates with the hardware and
processes the data.
With proper hardware selection in the HSDC Pro software, the TSW14J56 device is automatically
configured to support a wide range of operating speeds of the LM97937EVM, but it may not cover the full
operating range of the ADC device. Serial data rates (and corresponding sampling rates) of 7.4 Gb/s (370
MSPS) down to 1.6 Gb/s (80 MSPS) are supported.
For the rest of this document, the LM97937EVM evaluation board is referred to as EVM and the LM97937
device is referred to as ADC device.
4
List of Tables
Copyright © 2013, Texas Instruments Incorporated
SLAU542 – December 2013
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