USB/LPCI-3488A
High-Performance IEEE-488 GPIB Interface for USB/PCI
Introduction
The IEEE-488 standard, also known as GPIB, is a bus interface that connects instruments with a computer to
form an ATE system. GPIB was initially developed by Hewlett Packard and was recognized as an IEEE
standard in 1978. The IEEE-488.1-1978 standard defines the convention for electrical and mechanical bus
characteristics, as well as the state diagram for each bus function. In 1987, another standard was derived
from the original IEEE-488.1-1978 and known as IEEE-488.2-1978. It was introduced to define data formats,
common commands, and control protocols for instruments. In general, IEEE-488.1 defines hardware
specifications, and IEEE-488.2 defines software specifications. The IEEE-488 standard has been widely
accepted by instrument vendors over the past few decades. Today, GPIB is still the most popular interface
between computer and instruments.
USB-3488A
Instrument A
Able to Talk,
Listen and Control
ex: Computer
Instrument B
Able to Talk
and to Listen
ex: Oscilloscoae
Instrument C
Able to Listen
ex: Function
Generator
EOI
IFC
SRQ
ATN
REN
5system
Management
lines
LPCI-3488A
DAV
3 handshake
lines
NRFD
NDAC
DI01-8
8 data lines
Features
Handshake and data signals on the GPIB bus
■ Fully compatible with the IEEE-488 standard
■ Supports a 32-bit 3.3 V or 5 V PCI bus
■ Up to 1.5 MB/s data transfer rates
■ Built-in FIFO for read/write operations
■ Provides APIs compatible with NI-488.2 driver software*
■ Supports industrial-standard VISA library
■ Interactive utility for testing and diagnostics
■ Easy GPIB connectively for laptop computer (USB-3488A)
■ Plug and Play interface; No GPIB cable required for
instrument connection (USB-3488A)
■ 2 M USB cable attached (USB-3488A)
■ USB 2.0 compatible (USB-3488A)
Linear instrument connection
Star instrument connection
■ No external power required (USB-3488A)
ADLINK's USB-3488A and LPCI-3488A controller interface cards are fully compatible with the
■ꢀOperating Systems
IEEE-488.2 instrumentation control and communication standard and are capable of controlling up to
14 stand-alone instruments via IEEE-488 cables. The USB-3488A and LPCI-3488A are designed to meet
the requirements for high performance and maximum programming portability. The USB-3488A and
LPCI-3488A is developed using ADLINK's intellectual property in FPGAs which incorporates a GPIB controller,
provides capability, and supports a transfer rate up to 1.5 MB/s. With APIs that are compatible with NI-488.2*
driver software and VISA support, the USB-3488A and LPCI-3488A offer the best compatibility with
your existing applications and instrument drivers
ꢀ
•ꢀ Supports Windows 7/Vista/2000/XP/Server 2003
■ꢀRecommended Software
ꢀ
ꢀ
ꢀ
•ꢀ VB/VC++/BCB
•ꢀ LabVIEW*
•ꢀ LabWindow/CVI*
ADLINK GPIB Data Xfer Rate (Small Block Data)
ADLINK GPIB Data Xfer Rate (Large Block Data)
1600
1400
1200
1000
800
1000
800
600
400
200
600
400
200
0
200
400
600
800
0
1000
15 30 45 60 75 90 105 120 135 150
Block Size (Bytes)
Block Size (KBytes)
Performance
ADLINK's expertise in PCI and PXI interface cards was leveraged when developing these newly designed
GPIB interface cards. The LPCI-3488A, which is the low-profile PCI form factor, supports both 3.3 V and 5V PCI
buses and can be adapted to most industrial and desktop computers. A built-in FIFO is placed between the
GPIB bus and PCI controller to buffer GPIB read/write operations. This FIFO eliminates the gap between the
slow GPIB bus (~1.5 MB/s) and the fast PCI bus (132 MB/s), the maximum GPIB transfer rates of LPCI-3488A
is 1.5 MB/s, and dramatically increases overall system performance.
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