3U PXI express board Virtex-5 ADC / DAC Module, 2 ADC Channels; 250MHz @ 14 bits; 2 DACs @ 800MHz/16 bits

SMT743The SMT743 combines the power of the SMT943 with the PXIe compliant SMT700 carrier card.

This enables the use of an SMT943 WITHOUT a TIM (Such as SMT351-T), within a PXIe rack.

Details of each board follow.

The SMT700 is a Virtex 5 based PXIe board.

The SMT700 module uses a Xilinx Virtex 5 LXT or SXT to implement the interfaces the board provides. The FPGA can be configured either via the onboard flash, or through the Xilinx JTAG header.

SMT743 - Business SideThe SMT700 is one of the first of a new range of Sundance cards that includes a direct connection to SLB (Sundance Local Bus) compatible mezzanine card, without the need for a Sundance TIM. This enables a variety of cards to be added to a system, for example extra Ethernet ports, video in/out, High speed ADC / DAC etc. Data from these extra cards (along with data from the SMT700’s own inputs – up to 1Gb/s Ethernet, 2.5Gb/s optical links, and RSL links) can be processed via the Virtex 5, or by another linked card or module.


  • Xilinx Virtex 5 SX50T in an FF1136 package.
  • FPGA configuration from 64MByte flash using a Xilinx Coolrunner CPLD.
  • One 64-bit wide data bank of DDR2 memory. The bank uses 4 16-bit wide devices. Running this memory at 220MHz provides a maximum access speed of over 3.5Gbyte/s.
  • Sundance LVDS Bus (SLB) connector.
  • Front panel SATA connectors carrying Virtex5 serial interfaces.
  • Front panel RJ45 for gigabit Ethernet.
  • Front panel Fibre Optic modules carrying Virtex5 Serial interfaces.
  • Sundance RSL connector with 4 serial interfaces.
  • On-board USB interface to allow re-programming of the flash memory.

SMT743 - Back

The SMT943 is a single width expansion TIM that plugs onto an SLB base module and incorporates 2 Analog-to-Digital Converters and a Texas Instrument dual-channel Digital-to-Analog Converter (DAC5688). The SMT943 implements a comprehensive clock circuitry based on a chip (CDCE72010) from Texas instrument that allows synchronisation among the converters and the use of an external reference clock. It provides a complete conversion solution and stands as a platform that can be part of a transmit/receive base station.

ADCs are 14-bit and can sample at up to 250 MHz. The DAC has a resolution of 16 bits and is able to update outputs at up to 800MHz. All converters are 1.8/3.3-Volt.

Application Note – SMT743 System