Sundance SMT384 - Manual (Page 9)

Version 1.4 Page 9 of 47 SMT384 User Manual
Introduction
Overview
The SMT384 is a single width expansion TIM that plugs onto an SLB base module
(for instance SMT368 , SMT338-VP or SMT398-VP ) and incorporates 4 Texas
Instrument Analog-to-Digital Converters ( ADS5500 ). The SMT384 implements a
comprehensive clock circuitry based on a AD9510 chip that allows synchronisation
among the converters and cascading modules for multiple receiver systems as well
as the use of an external reference clock. It provides a complete conversion solution
and stands as a platform that can be part of a receive base station.
ADCs are 14-bit and can sample at up to 125 MHz. All converters are 3.3-Volt. As a
standard, the ADCs are all AC-coupled (RF Transformers), but can also be optionally
DC-coupled (TI opamp
THS4509 ).
The Xilinx FPGA on the base module is responsible for handling data or control
commands coming from the TI converters, Comports ( TIM-40 standard ), Sundance
H
igh-speed Bus ( SHB ). These interfaces are compatible with a wide range of
Sundance’s modules.
Converter configuration, sampling and transferring modes are set via internal control
registers stored inside the FPGA and accessible via Comport.
Module features
The main features of the SMT384 are listed below:
● Quad 14-bit 125MSPS ADC ( ADS5500 ),
● On-board low-jitter clock generation ( AD9510 ),
● One external clocks, two external triggers and one reference clock via
MMCX connector,
● One SLB connector to link SMT384 and the base SLB module,
● Synchronisation signals,
● All Analogue inputs to be connected to 50-Ohm sources/loads.
● Temperature sensors.