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Keysight L4451A
4-Channel Isolated D/A Converter
with Memory
Data Sheet
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Introduction
4-Channel D/A Converter offers high-voltage analog outputs wherever your
application needs it
The Keysight Technologies, Inc. L4451A is a high-performance 4-channel D/A converter that is L XI Class
C compliant. With its small size and Ethernet connectivity, the D/A converter can be placed wherever
your application needs it.
The Keysight L4451A has four isolated analog channels that are useful to source bias voltages to your
device under test, to control your analog programmable power supplies, or use the outputs as setpoints
for your control systems. You can use the standard waveforms provided or create your own with over
500,000 points. These points can be dynamically allocated among one or more channels and output as a
point-to-point arb.
Using this LXI instrument, you’ll get all the benets of an Ethernet connection, built-in instrument web
interface, standard software drivers and more. The LXI standard is supported by multiple vendors, enabling lower cost of test with accelerated test integration and development.
– LXI compliance includes built-in Ethernet connectivity
– Fully-featured graphical web interface
– Four isolated analog outputs
– Outputs up to ±16 V or ±20 mA DC
– 16-bits of resolution
– 200 kHz update rate
– Default standard waveforms
– Software drivers for most common programming environments
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Isolated analog outputs can
be stacked for higher voltage
outputs
Ext clock out
enable
User-supplied connections
Ext trig out
enable
The L4451A has four independent,
isolated channels that can output DC
voltage up to ±16 V or DC current up to
±20 mA with 16 bits of resolution. The
gain and offset can be adjusted while in
operation. And since these are isolated
channels, they can be stacked to create
waveforms with higher output voltages.
Each channel can be controlled manually, or use the onboard memory to
download a waveform. The 500 k global
memory can store up to 32 waveforms.
Any waveform can be dynamically
allocated among one or more channels
and output as a point-to-point arbitrary
waveform generator at up to 200 k
points/s. You can use the standard
sine, square or ramp wave shapes provided or define your own wave shape
using over 500,000 points and output to
a device under test.
Synchronize your outputs with the
CLK that can be divided down for each
channel independently.
16 bits
16 bits
16 bits
16 bits
DAC
1
DAC
2
DAC
3
DAC
4
Int trigInt clock
Ext clock in/out
Ext trig in/out
Channel 001
Channel 002
Channel 003
Channel 004
The L4451A is electronically calibrated
using an external DMM and the CAL
command.
System connections you can
trust
The L4451A comes with 1 heavy duty
50-pin Dsub connector that allows for
simple, reliable connection options.
Each connector uses 30 micro-inches
of gold to ensure a repeatable, accurate
measurement. Other connection
options include:
– Detachable terminal blocks with
strain relief
– Low-cost, standard 50-pin Dsub
connector kits and cables
– Mass interconnect solutions
Figure 1. L4451A 4-channel isolated D/A converter.
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Ethernet connectivity enables
simple connection to the network and remote access
to measurements
The Ethernet interface offers highspeed connections that allow for
remote access and control. You can
set up a private network to filter out
unwanted LAN traffic and speed up the
I/O throughput, or take advantage of
the remote capabilities and distribute
your tests worldwide. Monitor,
troubleshoot, or debug your application
remotely. Ethernet communication also
can be used with the support of LAN
sockets connections.
The optional GPIB interface has many
years of proven reliability and can be
used for easy integration into existing
applications.
The L4451A ships with the Keysight
E2094N I/O Libraries Suite, which
enables connections for Keysight and
non-Keysight modular and traditional
instruments. This makes it easy to
configure and integrate instruments
into your system.
Fully-featured graphical web
interface makes it easy to
set-up and troubleshoot your
tests from anywhere in the
world
The built-in web interface provides
remote access and control of the
instrument via a Java-enabled browser
such as Internet Explorer. Using the
web interface, you can set up, troubleshoot, and monitor your instrument
from remote locations.
Figure 2. The Web interface makes it easy to set up, troubleshoot and monitor your test remotely.
– View and modify instrument setup
– Configure analog and clock out-
puts
– Define and output waveforms
– View error queue
– Get status reports, current con-
figuration, firmware revisions, and
more
Additionally, since the web interface
is built into the instrument, you can
access it on any operating system
that supports a web browser without
having to install any special software.
Password protection and LAN lockout
are also provided to limit access for
additional security.
Software for most popular
programming environments
Full support for standard programming
environments ensures compatibility and
efficiency. You can use direct I/O with
your own software, or use standard
IVI and LabVIEW software drivers that
provide compatibility with the most
popular development environments:
– National Instruments LabVIEW,
LabWindows/CVI, TestStand,
and Switch Manager
– Microsoft C/C++ and Visual
Basic
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High-performance switching wherever your application needs it
Power
button
Status LEDs
Easy connection options
with terminal blocks,
standard 50-pin cables or
connector kits
Optional GPIB Built-in Ethernet
External trigger to
synchronize events
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Product specications
Output characteristics
DC voltage
DC current
Maxiumum update rate: 200 kHz point-to-point
Monotonic: to 16-bits
Isolation: > 80 VDC/AC peak
(channel-to-chassis or channel-to-channel)
Synchronization: Software commands or external trigger
Internal/external CLK accuracy: 100 ppm
AC accuracy: Not specified
Amplitude: ±16 V up to 10 mA
Resolution: 16-bit = 500 µV
Amplitude accuracy (DC): ±(0.05% + 3.0 mV)
(90 days, Tcal ±5 °C or Cal:MOD?: ±5°C)
Ripple and noise: < 2 mVrms, 20 Hz to
250 kHz into 10 kΩ load
Settling time: 40 µs (-full scale to +full scale step, single
channel, to rated accuracy)
Output impedance: < 1 Ω with the load sensed
Range: ±20 mA
Resolution: 16-bit = 630 nA
Accuracy: ±(0.09% + 5.0 μV)
(90 days, Tcal ±5 °C or Cal:MOD?: ±5°C
Ripple and noise: < 2 µArms, 20 Hz to 250 kHz into 250 Ω
Compliance voltage: ±12 V
Max open circuit voltage < ±22 V
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Product specications (continued)
Phase-locking I/O trigger characteristics
Trigger input Input level: TTL compatible
Trigger output Level: TTL compatible
Clock input Input level: TTL compatible
Clock output Level: TTL compatible
Memory
Type Volatile
Size 500 K for waveforms
States 5 instrument states with user label in non-volatile memory
General system specications
Power supply Universal 100 V to 240 V ±10%
Power line frequency 50 Hz to 60 Hz ±10% automatically sensed
Power consumption 15 VA
Operating environment Full accuracy for 0°C to 55°C
Storage environment -40°C to 70°C
Dimensions (H x W x L) 40.9 x 212.3 x 379.3 mm
Weight 3.7 kg, 8.2 lbs
Safety conforms to CSA, UL/IEC/EN 61010-1
EMC conforms to IEC/EN 61326-1, CISPR 11
Warranty 3 years
(3.3 V logic, 5 V tolerant)
Slope: Rising or falling, selectable
Pulse width: > 100 ns
Input impedance: > 10 kΩ, DC coupled
into 1 kΩ (3.3 V logic)
Output impedance: 50 Ω typical
(3.3 V logic, 5 V tolerant)
Input impedance: > 10 kΩ, DC
Maximum rate: 10 MHz
Into 1 kΩ (3.3 V logic)
Output impedance: 50 Ω typical
Maximum rate: 10 MHz
Accuracy: ±100 ppm
Full accuracy to 80% R.H. at 40 °C
1.61 x 8.36 x 14.93 in
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Product specications (continued)
Software
Keysight connnectivity
software included
Minimum system requirements
PC hardware Intel Pentium 100 MHz, 64 Mbyte RAM, 210 Mbyte disk space
Operating system
Computer interface
Software driver support for programming languages
Software drivers IVI-C and IVI-COM for Windows NT/2000/XP
Compatible with programming tools and environments
Keysight VEE Pro
National Instruments TestStand
Microsoft Visual Studio.NET
1
Keysight I/O Libraries Suite 14 or greater (E2094N)
Display 800x600, 256 colors, CD-ROM drive
Windows 98 SE/NT/2000/XP
Standard LAN 10BaseT/100BaseTx
Optional IEEE 488.2 GPIB
LabVIEW
Measurement Studio
LabWindows/CVI
LabVIEW
Switch Executive
C/C++
Visual Basic 6
1 Load I/O Libraries Version M for Windows NT support or version 14.0 for Windows 98 SE support
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Ordering information
Other accessories
Related literature
L4451A 4-channel isolated
D/A converter with memory
Includes User’s guide on CD, power
cord, and Quick Start package
Option -GPIB
Adds GPIB interface
Option 0B0
Deletes printed manual set, full
documentation included on CD ROM
Option ABA
English printed manual set
Connection options
Select terminal block for discrete
wiring, cables or connector kits.
Cables and connector kits require 2 per
instrument.
Y116 0 A
Rack mount kit for L4400 series instruments-racks 2 instruments side-by-side
with sliding tray
Note: when using the L4400 Series
Rack Mount Kit, use the Y1139A solder
cup connector kit rather than the
34921T terminal block.
For additional information please visit:
http://www.keysight.com/find/L4451A
Data sheets
5988-6302EN, Keysight VEE Pro
5989-1441EN, Keysight W1130B T&M
Toolkit 2.1 with Test Automation
5989-1439EN, Keysight E2094N I/O
Libraries Suite 15.5
34951T
Terminal block for 34951A and L4451A
4-Ch D/A converter
Y113 5A
1.5 m 50-pin Dsub, M/F twisted pair
with outer shield cable – 300 V
Y113 6A
3 m 50-pin Dsub, M/F twisted pair with
outer shield cable – 300 V
Y1141A
Solder cup connector kit with male
50-pin Dsub
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10 | Keysight | L4451A 4-Channel Isolated D/A Converter with Memory - Data Sheet
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AdvancedTCA® Extensions for Instrumentation and Test (AXIe) is an
open standard that extends the AdvancedTCA for general purpose and
semiconductor test. Keysight is a founding member of the AXIe consortium.
www.lxistandard.org
LAN eXtensions for Instruments puts the power of Ethernet and the
Web inside your test systems. Keysight is a founding member of the LXI
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rugged, PC-based high-performance measurement and automation system.
Three-Year Warranty
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of ownership. The only test and measurement company with three-year
warranty standard on all instruments, worldwide.
Keysight Assurance Plans
www.keysight.com/find/AssurancePlans
Up to five years of protection and no budgetary surprises to ensure your
instruments are operating to specification so you can rely on accurate
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breadth, combined with channel partner convenience.
www.keysight.com/find/L4451A
For more information on Keysight
Technologies’ products, applications or
services, please contact your local Keysight
office. The complete list is available at:
www.keysight.com/find/contactus
Americas
Canada (877) 894 4414
Brazil 55 11 3351 7010
Mexico 001 800 254 2440
United States (800) 829 4444
Asia Pacic
Australia 1 800 629 485
China 800 810 0189
Hong Kong 800 938 693
India 1 800 112 929
Japan 0120 (421) 345
Korea 080 769 0800
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Singapore 1 800 375 8100
Taiwan 0800 047 866
Other AP Countries (65) 6375 8100
Europe & Middle East
Austria 0800 001122
Belgium 0800 58580
Finland 0800 523252
France 0805 980333
Germany 0800 6270999
Ireland 1800 832700
Israel 1 809 343051
Italy 800 599100
Luxembourg +32 800 58580
Netherlands 0800 0233200
Russia 8800 5009286
Spain 0800 000154
Sweden 0200 882255
Switzerland 0800 805353
Opt. 1 (DE)
Opt. 2 (FR)
Opt. 3 (IT)
United Kingdom 0800 0260637
For other unlisted countries:
www.keysight.com/find/contactus
(BP-06-16-14)
This information is subject to change without notice.
© Keysight Technologies, 2013 - 2014
Published in USA, August 3, 2014
5989-4830EN
www.keysight.com
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