NI 6731/6733 Specifications

NI 6731/6733 Specifications
This document lists the specifications for the NI 6731/6733 analog output devices. The following specifications are typical at
25 °C unless otherwise noted.
Note With NI-DAQmx, National Instruments has revised its terminal names so they are easier to understand and
more consistent among NI hardware and software products. The revised terminal names used in this document are
usually similar to the names they replace. For a complete list of Traditional NI-DAQ terminal names and their
NI-DAQmx equivalents, refer to the Terminal Name Equivalents section of Chapter 2, I/O Connector, of the Analog
Output Series User Manual.
Analog Output
Max Update Rate
Output Characteristics
Number of channels
Number of
Channels
Using Local
FIFO (kS/s)*
Using Host PC
Memory (kS/s)†
7
833
869
8
740
769
NI 6731....................................... 4 voltage outputs
NI 6733....................................... 8 voltage outputs
Resolution ....................................... 16 bits, 1 in 65,536
*
Max update rate
Max Update Rate
These numbers apply to continuous waveform generation, which
allows for the time it takes to reset the FIFO to the beginning when
cycling through it. This additional time, about 200 ns, is not
incurred when using host PC memory for waveform generation.
Max update rate in FIFO mode does not change regardless of the
number of devices in the system.
Number of
Channels
Using Local
FIFO (kS/s)*
Using Host PC
Memory (kS/s)†
1
1,000
1,000
2
1,000
1,000
3
1,000
1,000
Type of DAC ...................................Double-buffered,
multiplying
4
1,000
1,000
FIFO buffer size
5
1,000
1,000
6
952
1,000
†
These results were measured using a PCI-6711/6713 device with
a 90 MHz Pentium machine. These numbers may change when
using more devices or when other CPU or bus activity occurs.
NI 6731 .......................................8,192 samples
NI 6733 .......................................16,384 samples
DMA channels.................................3
Data transfers...................................DMA, interrupts,
programmed I/O
DMA modes ....................................Scatter-gather
Accuracy Information
Absolute Accuracy
% of Reading
Nominal Range at
Full Scale (V)
±10
24 Hours
0.0044%
90 Days
1 Year
0.0052%
0.0061%
Offset (mV)
±1.027
Temp Drift (%/°C)
0.0006%
Absolute accuracy = (% of Reading × Voltage) + Offset + (Temp Drift × Voltage)
Note: Temp drift applies only if ambient is greater than ±10 °C of previous external calibration.
Transfer Characteristics
Input impedance.............................. 1 MΩ
Relative accuracy (INL)
Scaling Attenuation versus External Reference Frequency
After calibration ..........................±2.2 LSB max
1.6
Before calibration .......................±2.2 LSB max
DAC Code All 1s
1.4
DNL
1.2
Output Voltage
After calibration ..........................±1.0 LSB max
Before calibration .......................±1.0 LSB max
Monotonicity ...................................16 bits guaranteed after
calibration
Offset error
After calibration ..........................±168 μV max
Before calibration .......................±40 mV max
DAC Code 0xBFFF
1.0
0.8
DAC Code 0x7FFF
0.6
0.4
DAC Code 0x3FFF
0.2
DAC Code 0x1999
DAC Code All 0s
0.0
Gain error (relative to internal reference)
1
10
100
AO External Reference Frequency in kHz
After calibration ..........................±30 ppm of output max
Before calibration .......................±9,000 ppm of output
max
1000
Figure 1. Scaling Attenuation versus
External Reference Frequency
Gain error (relative to
external reference) ...........................+0.1% of output max, not
adjustable
AO External Reference THD versus External Reference Frequency
0
Voltage Output
–10
Ranges .............................................±10 V, ±EXT REF
–20
DAC F.S. THD
DAC 0.875 THD
DAC 0.750 THD
DAC 0.625 THD
DAC 0.500 THD
DAC 0.375 THD
DAC 0.250 THD
DAC 0.125 THD
–30
THD in dB
Output coupling...............................DC
Output impedance............................0.1 Ω max
Current drive....................................±5 mA max
–40
–50
–60
Output stability ................................Any passive load, up to
1,500 pF
–70
–80
Protection.........................................Short-circuit to ground
–90
1
Power-on state .................................0 V (±200 mV)
External Reference Input
10
AO External Reference Frequency in kHz
100
Figure 2. AO External Reference THD versus
External Reference Frequency
Range...............................................±11 V
Overvoltage protection ....................±25 V powered on,
±15 V powered off
NI 6731/6733 Specifications
2
ni.com
Dynamic Characteristics
Output buffer ...................................2,000 bytes
Slew rate ......................................... 15 V/μs
Timing I/O
Noise ............................................... 80 μVrms, DC to 1 MHz
Number of channels ........................2 up/down
counter/timers,
1 frequency scaler
Channel crosstalk ............................ –95 dB with SH68-68-EP
cable (generating a 10 V,
10 point sinusoidal at
100 kHz on the reference
channel)
Resolution
Counter/timers ............................24 bits
Frequency scaler .........................4 bits
Settling time .................................... 2.8 μs to ±1.0 LSB
accuracy
Compatibility...................................TTL/CMOS
Total harmonic distortion................ –90 dB typ (generating a
10 V, 1,000 point, 750 Hz
sine wave, summing
9 harmonics)
Base clocks available
Counter/timers ............................20 MHz, 100 kHz
Frequency scaler .........................10 MHz, 100 kHz
Stability
Base clock accuracy ........................±0.01% over operating
temperature
Offset temperature coefficient ........ ±35 μV/°C
Max source frequency .....................20 MHz
Gain temperature coefficient
Min source pulse duration ...............10 ns, edge-detect mode
Internal reference........................ ±6.5 ppm/°C
Min gate pulse duration...................10 ns, edge-detect mode
External reference....................... ±5.0 ppm/°C
Data transfers...................................DMA, interrupts,
programmed I/O
Onboard calibration reference
Level........................................... 5.000 V (1.0 mV) (actual
value stored in EEPROM)
DMA modes ....................................Scatter-gather
Temperature coefficient ............. ±0.6 ppm/°C max
Triggers
Long-term stability ..................... ±15 ppm/ 1,000 h
Digital Trigger
Digital I/O
Purpose
Number of channels ........................ 8 input/output
Analog output .............................Start trigger, gate, clock
Compatibility .................................. TTL/CMOS
Counter/timers ............................Source, gate
Digital logic levels
Level
Source..............................................PFI <0..9>
Min
Max
Compatibility...................................TTL
Input low voltage
0V
0.8 V
Response..........................................Rising or falling edge
Input high voltage
2.0 V
5.0 V
Pulse width ......................................10 ns min
Input low current (Vin = 0 V)
—
–320 μA
Input high current (Vin = 5 V)
—
10 μA
Trigger lines <0..6>.........................7
Output low voltage (IOL = 24 mA)
—
0.4 V
RTSI clock.......................................1
4.35 V
—
Output high voltage (IOH = –13 mA)
RTSI Bus (PCI Only)
PXI Trigger Bus (PXI Only)
Trigger lines <0..5>.........................6
Power-on state................................. Input (high-impedance)
Star trigger.......................................1
Data transfers .................................. DMA, interrupts,
programmed I/O
Clock ...............................................1
Input buffer ..................................... 2,000 bytes
© National Instruments Corporation
3
NI 6731/6733 Specifications
Bus Interface
Note Clean the device with a soft, non-metallic
brush. Make sure that the device is completely dry
and free from contaminants before returning it to
service.
NI PCI-6731/6733 ...........................5 V PCI master, slave
NI PXI-6733 ....................................PXI/CompactPCI master,
slave
Safety
Power Requirement
+5 VDC (±5%)............................0.80 A typ, 1.25 A max
This product is designed to meet the requirements of the
following standards of safety for electrical equipment for
measurement, control, and laboratory use:
+3.3 VDC (±5%).........................125 mA typ, 250 mA max
•
IEC 61010-1, EN 61010-1
Power available at
I/O connector ..............................+4.65 to +5.25 VDC at
1A
•
UL 61010-1, CSA 61010-1
NI 6731
Note For UL and other safety certifications,
refer to the product label, or visit ni.com/
certification, search by model number or
product line, and click the appropriate link in the
Certification column.
NI 6733
+5 VDC (±5%)............................1.25 A typ, 1.8 A max
+3.3 VDC (±5%).........................125 mA typ, 250 mA max
Power available at
I/O connector ..............................+4.65 to +5.25 VDC at
1A
Electromagnetic Compatibility
Physical
This product is designed to meet the requirements of the
following standards of EMC for electrical equipment for
measurement, control, and laboratory use:
Dimensions (not including connectors)
•
EN 61326 EMC requirements; Minimum Immunity
•
EN 55011 Emissions; Group 1, Class A
•
CE, C-Tick, ICES, and FCC Part 15 Emissions; Class A
NI PCI-6731/6733.......................17.5 × 10.7 cm
(6.87 × 4.2 in.)
NI PXI-6733 ...............................16 × 10 cm
(6.3 × 3.9 in.)
Note For EMC compliance, operate this device
with shielded cabling.
I/O connector...................................68-pin male SCSI-II type
Maximum Working Voltage
CE Compliance
Maximum working voltage refers to the signal voltage plus the
common-mode voltage.
This product meets the essential requirements of applicable
European Directives, as amended for CE marking, as follows:
Channel-to-earth ..............................±11 V, Installation
Category I
Channel-to-channel .........................±22 V, Installation
Category I
73/23/EEC; Low-Voltage Directive (safety)
•
89/336/EEC; Electromagnetic Compatibility Directive
(EMC)
Note Refer to the Declaration of Conformity
(DoC) for this product for any additional regulatory
compliance information. To obtain the DoC for this
product, visit ni.com/certification, search by
model number or product line, and click the
appropriate link in the Certification column.
Environmental
The NI 6731/6733 is intended for indoor use only.
Operating temperature.....................0 to 50 °C
Storage temperature.........................–20 to 70 °C
Waste Electrical and Electronic
Equipment (WEEE)
Humidity..........................................5 to 90% RH,
noncondensing
EU Customers At the end of their life cycle, all
products must be sent to a WEEE recycling center.
For more information about WEEE recycling
centers and National Instruments WEEE initiatives,
visit ni.com/environment/weee.htm.
Maximum altitude ...........................2,000 meters
Pollution Degree..............................2
NI 6731/6733 Specifications
•
4
ni.com
Device Pinouts
AO GND
NC
AO GND
AO GND
NC
AO GND
NC
AO GND
AO GND
AO 3
AO GND
AO GND
AO 0
AO 1
AO EXT REF
P0.4
D GND
P0.1
P0.6
D GND
+5 V
D GND
D GND
PFI 0
PFI 1
D GND
+5 V
D GND
PFI 5/AO SAMP CLK
PFI 6/AO START TRIG
D GND
PFI 9/CTR 0 GATE
CTR 0 OUT
FREQ OUT
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
NC
AO GND
AO GND
NC
AO GND
AO GND
NC
AO GND
NC
AO GND
AO GND
AO 2
AO GND
AO GND
AO GND
D GND
P0.0
P0.5
D GND
P0.2
P0.7
P0.3
NC
EXT STROBE
D GND
PFI 2
PFI 3/CTR 1 SOURCE
PFI 4/CTR 1 GATE
CTR 1 OUT
D GND
PFI 7
PFI 8/CTR 0 SOURCE
D GND
D GND
NC = No Connect
Figure 3. NI 6731 68-Pin AO I/O Connector Pin Assignments
© National Instruments Corporation
5
NI 6731/6733 Specifications
AO GND
NC
AO GND
AO GND
AO 6
AO GND
AO 5
AO GND
AO GND
AO 3
AO GND
AO GND
AO 0
AO 1
AO EXT REF
P0.4
D GND
P0.1
P0.6
D GND
+5 V
D GND
D GND
PFI 0
PFI 1
D GND
+5 V
D GND
PFI 5/AO SAMP CLK
PFI 6/AO START TRIG
D GND
PFI 9/CTR 0 GATE
CTR 0 OUT
FREQ OUT
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
NC
AO GND
AO GND
AO 7
AO GND
AO GND
NC
AO GND
AO 4
AO GND
AO GND
AO 2
AO GND
AO GND
AO GND
D GND
P0.0
P0.5
D GND
P0.2
P0.7
P0.3
NC
EXT STROBE
D GND
PFI 2
PFI 3/CTR 1 SOURCE
PFI 4/CTR 1 GATE
CTR 1 OUT
D GND
PFI 7
PFI 8/CTR 0 SOURCE
D GND
D GND
NC = No Connect
Figure 4. NI 6733 68-Pin AO I/O Connector Pin Assignments
National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation.
Refer to the Terms of Use section on ni.com/legal for more information about National
Instruments trademarks. Other product and company names mentioned herein are trademarks or trade
names of their respective companies. For patents covering National Instruments products, refer to the
appropriate location: Help»Patents in your software, the patents.txt file on your CD, or
ni.com/patents.
© 2004–2007 National Instruments Corporation. All rights reserved.
371232B-01
Jun07