GX3756 Series

GX3756 Series Specifications

Digital I/O Channels
Logic Family	TTL, 5 V compatible
Drive Hi	4 V (min), 5.5 V (max), 5 V nominal
Drive Lo	0V (min), 0.5V (max)
Output Current	±24.0 mA, max
Input Hi	4 V (min), 5.5 V (max), 5 V nominal
Input Lo	0V (min), 0.5 V (max)
Number of Channels	56 TTL I/O, Output enable in groups of 4 Group 0 configurable as (4) serial transmitters
Connector ID	3 bits, TTL compatible, detects opens or shorts
Serial Data Transmitter	Data rate: 1 kHz Number of bits: 30
Connector	62 pin, D-sub female
Timing Sources
PXI Bus	10 MHz
Internal	80 MHz oscillator, ±20 ppm
FPGA and Memory
FPGA Type	Altera Stratix III, EP3SL50F780
Number of PLLs	Four
Logic Elements	47.5 k
Internal Memory	1.836 Mb
On-Board Memory	256 K x 32 SSRAM
On-Board Flash	16 MB

Power
3.3 VDC	1.0 A max.
5 VDC	0.5 A typical, 1.5 A max.

Environmental
Operating Temperature Range	GX3756: 0°C to +50°C GX3756-M: 0°C to +83°C; contact factory for extended temperature range specifications
Storage Temperature Range	-20°C to +85°C
Relative Humidity (operating)	5% to 85%, temperature range 0°C to 60°C 5% to 60% for operating temperatures above 60°C
Altitude (operating)	4600 meters (max)
Size	3U PXI, hybrid slot compatible
Weight	200 g

Note: Specifications are subject to change without notice.

Digital Selection Guide

The GX3756 is a user configurable, FPGA-based, 3U PXI card which offers 56, TTL I/O signals. The module consists of a daughter card and the GX3700 FPGA baseboard which employs the Altera Stratix III FPGA.

Features

The GX3756’s digital I/O signals are 5 V logic compatible. Four of the 56 TTL outputs can be configured to support 30 bit, 1 KHz serial data streams. Each I/O channel can be accessed via read / write register commands and each group of 4 TTL outputs can be enabled or tri-stated. The 56 TTL inputs are overvoltage protected. In addition, there are (3) connector ID bits which can be used for connector / cable identification as well as providing open / short detection. Each TTL output can be readback by the TTL inputs.

The FPGA has access to all of the PXI bus resources including the PXI 10 MHz clock, the local bus, and the PXI triggers; allowing the user to create a custom instrument which incorporates all PXI bus resources. Control and access to the FPGA is provided via the GX3756’s driver which includes the ability to download compiled FPGA code as well as register read and write functionality.

Programming and Software

The board is supplied with the GxFPGA library, a software package that includes a virtual instrument panel, and a Windows 32/64-bit DLL driver library and documentation. The virtual panel can be used to interactively program and control the instrument from a window that displays the instrument’s current settings and status. In addition, interface files are provided to support access to programming tools and languages such as ATEasy, LabVIEW, LabVIEW/Real-Time, C/C++, Microsoft Visual Basic®, Delphi, and Pascal. An On-Line help file and PDF User’s Guide provides documentation that includes instructions for installing, using and programming the board.

Applications