Multifunction_RIO_Specs.pdf - 第4页
Multifunction Reconfigurable I/O Specifi cations 4 ni.com Analog Output (NI 783 x /784 x /785 x Only) Output Char acteristics Output type ............... ....................... Single-ended, voltage output Number of cha…
© National Instruments Corporation 3 Multifunction Reconfigurable I/O Specifications
DC Transfer Characteristics
INL
NI 783x ....................................... ±3 LSB typ, ±6 LSB max
NI 784x/785x .............................. ±1 LSB typ, ±3 LSB max
DNL
NI 783x ....................................... –1.0 to +2.0 LSB max
NI 784x/785x .............................. ±0.4 LSB typ,
±0.9 LSB max
No missing codes
NI 783x ....................................... 16 bits typ, 15 bits min
NI 784x/785x .............................. 16 bits guaranteed
CMRR, DC to 60 Hz....................... –86 dB
Dynamic Characteristics
Bandwidth
NI 783x
Small signal (–3 dB) .............. 650 kHz
Large signal (1% THD) ......... 55 kHz
NI 784x/785x
Small signal (–3 dB) .............. 1 MHz
Large signal (1% THD) ......... 500 kHz
Settling Time
Crosstalk ......................................... –80 dB, DC to 100 kHz
Device
Step
Size
Accuracy
±16 LSB ±4 LSB ±2 LSB
NI 783x ±20.0 V 7.5 μs 10.3 μs 40 μs
±2.0 V 2.7 μs 4.1 μs 5.1 μs
±0.2 V 1.7 μs 2.9 μs 3.6 μs
NI 784x/
785x
±20.0 V 2.1 μs 4.2 μs 8 μs
±2.0 V 1.3 μs 1.6 μs 1.8 μs
±0.2 V 0.8 μs 1.1 μs 1.2 μs
Multifunction Reconfigurable I/O Specifications 4 ni.com
Analog Output (NI 783x /784x /785x Only)
Output Characteristics
Output type ......................................Single-ended,
voltage output
Number of channels
NI 7830 .......................................4
NI 7831/7833/7841/7842/
7851/7852/7853/7854 .................8
Resolution ....................................... 16 bits, 1 in 65,536
Update time..................................... 1.0 μs
Maximum update rate ..................... 1 MS/s
Type of DAC .................................. Enhanced R-2R
Accuracy Information
DC Transfer Characteristics
INL ..................................................±0.5 LSB typ,
±4.0 LSB max
DNL.................................................±0.5 LSB typ,
±1 LSB max
Monotonicity ...................................16 bits, guaranteed
Voltage Output
Range...............................................±10 V
Output coupling ...............................DC
Output impedance
NI 783x .......................................1.25 Ω
NI 784x/785x...............................0.5 Ω
Current drive....................................±2.5 mA
Protection.........................................Short-circuit to ground
Power-on state .................................User configurable
Dynamic Characteristics
Settling time
Slew rate ......................................... 10 V/μs
Noise ............................................... 150 μV
rms
, DC to 1 MHz
Glitch energy
at midscale transition ...................... ±200 mV for 3 μs
Nominal Range (V)
Absolute Accuracy
Absolute
Accuracy at
Full Scale
(mV)
% of Reading
Offset (μV)
Tem p Drift
(%/°C)
Positive Full
Scale
Negative Full
Scale
24 Hours 1 Year
10.0 –10.0 0.0335 0.0351 2366 0.0005 5.88
Note: Accuracies are valid for analog output following an internal calibration. Analog output accuracies are listed for
operation temperatures within ±1 °C of internal calibration temperature and ±10 °C of external or factory calibration
temperature. Temp Drift applies only if ambient is greater than ±10 °C of previous external calibration.
Step Size
Accuracy
±16 LSB ±4 LSB ±2 LSB
±20.0 V 6.0 μs 6.2 μs 7.2 μs
±2.0 V 2.2 μs 2.9 μs 3.8 μs
±0.2 V 1.5 μs 2.6 μs 3.6 μs
© National Instruments Corporation 5 Multifunction Reconfigurable I/O Specifications
Digital I/O
Number of channels
NI 781x ....................................... 160
NI 7830....................................... 56
NI 7831/7833/7841/7842/
7851/7852/7853/7854................. 96
Compatibility .................................. TTL
Digital logic levels
Output current
Source......................................... 4.0 mA
Sink............................................. 4.0 mA
Input leakage current ...................... ±10 μA
Power-on state................................. Programmable, by line
Protection
Input
NI 781x/783x.......................... –0.5 to 7.0 V, single line
NI 784x/785x
..........................–20.0
to
20.0
V,
single
line
Output......................................... Short-circuit
(up to eight lines may be
shorted at a time)
Minimum pulse width
Input............................................ 25 ns
Output......................................... 12.5 ns
Minimum sampling period.............. 5 ns
Reconfigurable FPGA
NI 7811/7830/7831
FPGA type ..................................Virtex-II V1000
Number of flip-flops ...................10,240
Number of 4-input LUTs ............10,240
Number of 18 × 18 multipliers ...40
Embedded block RAM ...............720 kbits
NI 7813/7833
FPGA type ..................................Virtex-II V3000
Number of flip-flops ...................28,672
Number of 4-input LUTs ............28,672
Number of 18 × 18 multipliers ...96
Embedded block RAM ...............1,728 kbits
NI 7841/7851
FPGA type ..................................Virtex-5 LX30
Number of flip-flops ...................19,200
Number of 6-input LUTs ............19,200
Number of DSP48
slices (25 × 18 multipliers) .........32
Embedded block RAM ...............1,152 kbits
NI 7842/7852
FPGA type ..................................Virtex-5 LX50
Number of flip-flops ...................28,800
Number of 6-input LUTs ............28,800
Number of DSP48
slices (25 × 18 multipliers) .........48
Embedded block RAM ...............1,728 kbits
NI 7853
FPGA type ..................................Virtex-5 LX85
Number of flip-flops ...................51,840
Number of 6-input LUTs ............51,840
Number of DSP48
slices (25 × 18 multipliers) .........48
Embedded block RAM ...............3,456 kbits
NI 7854
FPGA type ..................................Virtex-5 LX110
Number of flip-flops ...................69,120
Number of 6-input LUTs ............69,120
Number of DSP48
slices (25 × 18 multipliers) .........64
Embedded block RAM ...............4,608 kbits
Timebase .........................................40, 80, 120, 160,
or 200 MHz
Level Min Max
Input low voltage (V
IL
)
Input high voltage (V
IH
)
0.0 V
2.0 V
0.8 V
5.5 V
Output low voltage (V
OL
),
where I
OUT
= –4 mA
Output high voltage (V
OH
),
where I
OUT
= 4 mA
0 V
2.4 V
0.4 V
3.3 V