R Series Intelligent DAQ –
Data Acquisition and Control with Onboard Processing
Protection
Input
NI 781xR/783xR ......................... -0.5 to 7.0 V, single line
NI 784xR/785xR ......................... -20.0 to 20.0 V, single line
Output ............................................. Short-circuit (up to eight lines
may be shorted at a time)
Voltage Output
Range .................................................. 10 V
Output coupling................................... DC
Output impedance
NI 783xR ......................................... 1.25 Ω
NI 784xR/785xR.............................. 0.5 Ω
Current drive ....................................... 2.5 mA
Protection............................................ Short-circuit to ground
Power-on state.................................... User configurable
Minimum pulse width
Input................................................ 25 ns
Output ............................................. 12.5 ns
Minimum sampling period.................. 5 ns
Accuracy Information
Reconfigurable FPGA
Absolute Accuracy
Nominal Range (V)
Positive Negative
Full Scale Full Scale 24 Hours
% of Reading
Absolute
Temp Drift Accuracy at Full
NI 7811R/7830R/7831R
FPGA type............................................ Virtex-II 1000
Number of flip-flops............................ 10,240
Number of 4-input LUTs...................... 10,240
Number of 18x18 multipliers.............. 40
Offset (µv)
(%/°C)
Scale (mV)
1 Year
10.0
-10.0
0.0335
0.0351
2,366
0.0005
5.88
Accuracies are valid for analog output following an internal calibration. Analog output accuracies are
Note:
listed for operation temperatures within 1 ꢀC of internal calibration temperature and 10 ꢀC of external or
factory calibration temperature. Temperature drift applies only if ambient is greater than 10 ꢀC of previous
external calibration.
Embedded block RAM......................... 720 kb
NI 7813R/7833R
DC Transfer Characteristics
FPGA type............................................ Virtex-II 3000
Number of flip-flops............................ 28,672
Number of 4-input LUTs...................... 28,672
Number of 18x18 multipliers.............. 96
INL .................................................... 0.5 LSB typ, 4.0 LSB max
DNL .................................................... 0.5 LSB typ, 1 LSB max
Monotonicity....................................... 16 bits, guaranteed
Settling Time
Embedded block RAM......................... 1,728 kb
Accuracy
NI 7841R/7851R
Step Size
16 LSB
6.0 µs
2.2 µs
1.5 µs
4 LSB
6.2 µs
2.9 µs
2.6 µs
2 LSB
7.2 µs
3.8 µs
3.6 µs
20.0 V
2.0 V
0.2 V
FPGA type............................................ Virtex-5 LX30
Number of flip-flops............................ 19,200
Number of 6-input LUTs...................... 19,200
Number of DSP48
slices (25x18 multipliers)................ 32
Embedded block RAM......................... 1,152 kb
Dynamic Characteristics
Slew rate............................................. 10 V/µs
Noise................................................... 150 µVrms, DC to 1 MHz
Glitch energy at midscale transition..... 200 mV for 3 µs
NI 7842R/7852R
FPGA type............................................ Virtex-5 LX50
Number of flip-flops............................ 28,800
Number of 6-input LUTs...................... 28,800
Number of DSP48
slices (25x18 multipliers)................ 48
Embedded block RAM......................... 1,728 kb
Digital I/O
Number of channels
NI 7811R/7813R ............................. 160
NI 7830R......................................... 56
NI 7831R/7833R/784xR/785xR ..... 96
Digital logic levels .............................. 3.3 V TTL, 5 V TTL Compatible
NI 7853R
Level
Input low voltage (VIL)
Input high voltage (VIH
Output low voltage (VOL),
where IOUT = -4 mA
Min (V)
0.0 V
2.0 V
–
Max (V)
0.8 V
5.5 V
FPGA type............................................ Virtex-5 LX85
Number of flip-flops............................ 51,840
Number of 6-input LUTs...................... 51,840
Number of DSP48
slices (25x18 multipliers)................ 48
Embedded block RAM......................... 3,456 kb
)
0.4 V
Output high voltage (VOH),
where IOUT = 4 mA
2.4 V
3.3 V
Output current
NI 7854R
Source............................................. 4.0 mA
Sink ................................................. 4.0 mA
Input leakage current.......................... 10 µA
Power-on state.................................... Programmable, by line
Data transfers ..................................... DMA, interrupts,
programmed I/O
FPGA type............................................ Virtex-5 LX110
Number of flip-flops............................ 69,120
Number of 6-input LUTs...................... 69,120
Number of DSP48
slices (25x18 multipliers)................ 64
Embedded block RAM......................... 4,608 kb
BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)
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