SLWU079D March   2012  – April 2016

 

  1.   TSW140x High Speed Data Capture/Pattern Generator Card
    1.     Trademarks
    2. 1 Functionality
      1. 1.1 ADC EVM Data Capture
      2. 1.2 DAC EVM Pattern Generator
    3. 2 Hardware Configuration
      1. 2.1 Power Connections
        1. 2.1.1 Output Power Regulators
      2. 2.2 Switches, Jumpers and Fuses
        1. 2.2.1 Switches and Pushbuttons
        2. 2.2.2 Jumpers
        3. 2.2.3 Fuses
      3. 2.3 LEDs
      4. 2.4 Connectors
        1. 2.4.1 Input LVDS ADC Interface Connector
        2. 2.4.2 JTAG Connector
        3. 2.4.3 Input CMOS ADC Interface Connector
        4. 2.4.4 Output LVDS Connector
        5. 2.4.5 Output CMOS DAC Interface Connector
        6. 2.4.6 USB I/O Connection
    4. 3 Software Start up
      1. 3.1 Installation Instructions
      2. 3.2 USB Interface and Drivers
      3. 3.3 Device ini Files
    5. 4 ADC Data Capture Software Operation
      1. 4.1 Testing a TSW1400 EVM with an ADS5281 EVM
      2. 4.2 Testing a TSW1400EVM with an ADS62P49EVM (CMOS Interface)
    6. 5 TSW1400 Pattern Generator Operation
      1. 5.1 Testing a TSW1400 EVM with a DAC3152 EVM
      2. 5.2 Loading DAC Firmware
      3. 5.3 Configuring TSW1400 for Pattern Generation
      4. 5.4 Testing a TSW1400 EVM with a DAC5688EVM (CMOS Interface)
    7. 6 TSW1405 Functional Description
      1. 6.1 Hardware Description
        1. 6.1.1 Power Connections
        2. 6.1.2 Pushbuttons
        3. 6.1.3 Jumpers
        4. 6.1.4 LEDs
      2. 6.2 Software Operation
        1. 6.2.1 Channel Selection
    8. 7 TSW1406 Functional Description
      1. 7.1 Hardware Description
        1. 7.1.1 Power Connections
        2. 7.1.2 Pushbuttons
        3. 7.1.3 Jumpers
        4. 7.1.4 LEDs
      2. 7.2 Software Operation
    9. 8 Revision History

2.4.1 Input LVDS ADC Interface Connector

The connection between the TSW1400EVM and the ADC EVM to be tested is through a 128-pin High speed Samtec connector. 35 LVDS data pairs plus two LVDS clock pairs have a defined position in the connector pinout that is common between the TSW1400EVM and many TI ADC EVMs. For the parallel LVDS DDR data format, the bit clock runs at the same rate as the sample clock to the ADC. For the serial LVDS data format, the bit clock runs at a higher multiple of the ADC sample clock and is used to strobe the serial data into the TSW1400EVM and then de-serialize the data. For the serial LVDS data format, a second clock is provided, called the frame clock or FCLK, that runs at the sample rate and is used to delineate the sample boundaries in the serial data stream. The frame clock line can be used as a second clock in the parallel LVDS DDR format that uses two data buses. The data direction for the LVDS data pairs is always defined as the ADC EVM driving the signal through the connector to the TSW1400EVM FPGA, with integrated 100-Ω termination in the FPGA.

For one-channel parallel DDR bit-wise data formats, eight of the LVDS data pairs are used to support up to 16-bit-resolution ADCs at up to 250-MHz sampling rates. For one-channel parallel DDR sample-wise data formats, 14 of the LVDS data pairs are used to support up to 14-bit-resolution ADCs at up to 500-MHz sampling rates. For two-channel parallel DDR bit-wise data formats, 14 of the LVDS data pairs are used to support two channels of 14-bit resolution at up to 250-MHz sampling rate.

For serial data formats, eight of the LVDS data pairs support up to eight channels of one-wire serial ADCs at up to 65-MHz sampling rate or four channels of two-wire serial ADCs at up to 125-MHz sampling rates.

Eight extra CMOS single-ended signals are defined in the Samtec connector that are sourced from the USB interface through the connector to the ADC EVM. These signals, in the future, will allow the GUI to control the SPI serial programming of the ADC for those ADC EVMs that support this feature.

The Samtec connectors snap together with no screws or other mechanism to hold the TSW1400EVM and the ADC EVM together. The TSW1400EVM comes with standoff posts for setting the TSW1400EVM flat on a bench or table. The ADC EVM has shorter standoff posts so that the TSW1400EVM and ADC EVM will lay flat on a bench or table and stay snapped together during use.