High-Speed Voltage Output – up to

1 MS/s/Channel, up to 16-Bit, up to 32 Channels

Overview and Applications

National Instruments high-speed voltage output modules combine

the latest in PC technologies to deliver simultaneous, multichannel

updates for control and waveform output applications. Use these

modules in a variety of applications, including:

• Stimulus/response

• Power supply control

• High-speed, deterministic control

• Sensor/signal simulation

Features

NI high-speed voltage output devices are versatile devices

that

commonly replace several kinds of instruments including stand-

alone PID controllers, low-speed arbitrary waveform generators, and

function generators.

Waveform Generation

These devices are capable of updating at rates up to 1 MS/s, giving

them the ability to generate waveforms up to 500 kHz. When using

these devices, you have complete control of each data point that is

updated on the output for each channel. This feature is significant

because you can define not only common waveforms such as square,

sine, or sawtooth but also complex waveforms. For instance, you are

able to create a sine wave that is overlaid with noise in which the

amplitude and noiseshape is user-defined. In practice, the waveform

is defined in a software buffer, within PC memory, and is streamed to

the voltage output device using DMA (direct memory access) data

transfers. Using DMA transfers, the amount of memory located

onboard the voltage output device is minimized and is swapped with

inexpensive PC memory.

Real-Time Control

You can use NI high-speed voltage output devices with the LabVIEW

Real-Time Module to deliver real-time, deterministic control loop

execution. Because they are compatible with LabVIEW Real-Time,

common control algorithms, such as PID, are simple to implement

but, more importantly, you may prototype and implement complex

and cutting-edge control algorithms as well. High-performance

control, on the order of 8 PID loops running in excess of 20 kHz

each, is possible with this combination of hardware and software.

Each high-speed voltage output device offers multichannel

simultaneous updates and hardware-timed single-point updates.

Family

Bus

Analog

Outputs

Update Rate

Per Channel (S/s)

1

Output

Resolution

Output

Range (V)

External Voltage

Reference

Digital I/O

Counters/

Timers

Triggering

NI 6711

PCI, PXI

4

1 M

12

±10



8

2, 24-bit

Digital

NI 6713

PCI, PXI

8

740 k to 1 M

12

±10



8

2, 24-bit

Digital

NI 6715

PCMCIA

8

100 k to 1 M

12

±10



8

2, 24-bit

Digital

NI 6731

PCI

4

1 M

16

±10



8

2

2, 24-bit

Digital

NI 6733

PCI, PXI

8

740 k to 1 M

16

±10



8

2

2, 24-bit

Digital

NI 6722

PCI, PXI

8

182 k to 800 k

13

±10

–

8

2, 24-bit

Digital

NI 6723

PCI, PXI

32

45 k to 800 k

13

±10

–

8

2, 24-bit

Digital

Table 1. High-Speed Voltage Output Product Selection Guide

NI 673x, NI 671x, NI 672x

• Low-cost arbitrary

waveform generation

• High channel density

• Integrated multidevice

synchronization bus

• Easy real-time control with

LabVIEW Real-Time

• Digital triggering and

external clocking

• Simultaneous updates

• 8 digital I/O lines (TTL/CMOS)

• Two 24-bit counter/timers

• Measurement services that simplify

configuration and measurements

Operating Systems

• Windows 2000/NT/XP

• Mac OS X

• Linux

Recommended Software

• LabVIEW 7.x or higher

• LabWindows/CVI 7.x or higher

• Measurement Studio 7.x or higher

• Analog Waveform Editor

Other Compatible Software

• Visual Studio .NET

• Visual Basic, C/C++, and C#

Measurement Services

• NI-DAQmx driver

• Measurement & Automation

Explorer configuration utility

must use NI-DAQmx Base driver software.

Calibration Certificate Available