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