Detailed function introduction based on TXMC638

The TEWS Technology TXMC638 is a high-performance XMC card featuring 24 analog-to-digital converter (ADC) channels, each utilizing the Linear Technology LTC2323-16 chip. This 16-bit ADC operates at a sampling rate of 5 million samples per second (Msps), using a successive approximation register (SAR) architecture. It's designed for integration into a programmable data acquisition system, offering a robust and flexible solution for high-speed signal processing. The board is equipped with a Xilinx Kintex-7 FPGA—available in three variants (K160T, K325T, or K410T)—and includes a 1GB, 32-bit wide DDR3 SDRAM chip for on-board memory.

The TXMC638 also provides three differential input terminals, each with a 100-ohm AC-coupled design and a wide voltage range, making it suitable for various signal conditioning applications. All I/O ports and the three 100-ohm input channels are connected through a 98-pin Samtec ERF8-049 connector, ensuring reliable and high-speed signal transmission. The FPGA on the board comes preloaded with a reference design, and users can program it using either Xilinx’s USB programmer or the onboard configuration controller (BCC). For system-level programming, the FPGA can be configured via SPI flash, while real-time debugging is supported through the JTAG port. PCIe compatibility is also available via Xilinx Tandem Configuration, with the "Tandem PROM" method recommended for optimal performance.

The Kintex-7 FPGA used on this card is built on a 28nm process, significantly reducing power consumption compared to previous generations and doubling the price/performance ratio. It offers high-density logic (up to 478,000 logic cells), high-speed serial connectivity (up to 1.6 Gb/s), DDR memory support, 12.5 Gb/s high-speed transceivers, DSP capabilities, a PCI Express interface, and 16-channel dual 12-bit digital-to-analog converters (DACs).

The card supports differential ADC inputs that process signals ranging from ±2.5V to produce a ±5V differential output. Additionally, it features 64 digital I/O pins on the XMC P14 connector, supporting 64 single-ended LVCMOS 24 or 32 differential LVDS25 interfaces, as well as four 12.5Gbps GTX transceiver pins on the P16 connector. This makes the TXMC638 ideal for high-speed data acquisition, control, and communication systems.

According to the TEWS datasheet, developers can create custom data acquisition and control applications for the TXMC638 using the Xilinx Vivado Design Suite. Launched in 2012, Vivado is an integrated design environment that combines advanced tools for system-level design, logic implementation, and debugging. It supports everything from system architecture to IC-level development, helping engineers integrate more functionality onto fewer chips while improving efficiency and performance.