DEMO MANUAL DC2677A LTC2358-18, LT6658, ADA4522-2 Industrial Data Acquisition Nonisolated Board DESCRIPTION Demonstration circuit 2677A is a reference design for The digital interface is an HSMC (high-speed mezzanine robust industrial data acquisition applications for the connector), which is compatible with Altera Cyclone V LTC 2358-18. The LTC2358-18 is capable of high voltage SoCkit and other Altera FPGA evaluation boards that sup- measurements with a large input common range however, port 3.3V CMOS I/O. the DC2677A implements input protection that allows up This demo manual covers the basic functionality of the to 400V of continuous input protection. Combined with gas DC2677A. discharge tubes, which provide protection from surges, Refer to design files for schematic and parts list/bill of the DC2677A is capable of surviving extreme abuse. materials. This reference design includes the LTC2358-18 SAR ADC, Design files for this circuit board are available at ADA4522-2 dual zero-drift operational amplifier, and an DEMO MANUAL DC2677A QUICK START PROCEDURE 1. Prepare the SoCkit board and SD card image as 11. Enter the IP address from the SoCkit LCD screen in the SOCKIT IP argument. Click Run. described here: www.analog.com/solutions/7704. 2. Install the LinearLabTools software package from: 12. If the script reports an incorrect FPGA bitstream file, www.analog.com/linearlabtools. log into the SoCkit board using an SSH client such as Putty on Windows, or directly from a terminal in Mac 3. Follow the procedure for Installing Python: www. or Linux. User name is sockit, password is sockit. analog.com/docs/52543 Run these commands: 4. Carefully mount the DC2677A to the SoCkit board via cd fpga bitfiles the HSMC connector, using 5mm standoffs between the boards. Tighten mounting screws. rm default.rbf 5. Connect the SoCkit board to a network with a DHCP ln --symbolic DC2677A.rbf default.rbf server, or connect directly to host computers sudo program fpga.sh default.rbf Ethernet jack or USB-Ethernet adapter. (enter sockit for the password). 6. Apply 16V to the indicated terminals. Refer to Figure1 for locations. This only needs to be done once. The correct FPGA bit- stream file will be loaded automatically the next time the 7. Apply a low jitter signal source to J1 and J2. board boots. 8. Power up the SoCkit board using the 12V adapter. The script will capture data and display each channel in its 9. After approximately 30 seconds, the FPGA CONF D own window. Figure2 shows a data capture for channel 0. LED will illuminate, the boards IP address will show in the LCD display, and LED1 and LED2 will blink at different rates. 10. Open Spyder (the Anaconda Python Debugger) Click file open Navigate to the location where LinearLabTools is installed. Open this script: python llt demo board examples ltc23xx ltc2358 Open ltc2358 dc2677a a.py UG-1387 Rev 0 2