National Semiconductor NI 6351, 6353 Technical data

NI 6351/6353 Specifications

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Specifications listed below are typical at 25 °C unless otherwise noted. Refer to the X Series User Manual for more information about NI PCIe-6351/6353 and NI USB-6351/6353 devices.

Analog Input

Number of channels
NI 6351.......................................8 differential or
16 single ended
NI 6353.......................................16 differential or
ADC resolution...............................16 bits
DNL ................................................ No missing codes
guaranteed
INL.................................................. Refer to the AI Absolute
Accuracy Table
Sampling rate
Maximum ...................................1.25 MS/s single channel,
1.00 MS/s multi-channel (aggregate)
Minimum....................................No minimum
Timing accuracy.........................50 ppm of sample rate
Timing resolution....................... 10 ns
Input coupling................................. DC
Input range ...................................... ±10 V, ±5 V, ±2 V, ±1 V,
±0.5 V, ±0.2 V, ±0.1 V
Maximum working voltage for analog inputs
(signal + common mode)................ ±11 V of AI GND
CMRR (DC to 60 Hz)..................... 100 dB
Input impedance
Device on
AI+ to AI GND...................... >10 G in parallel
with 100 pF
AI– to AI GND ...................... >10 G in parallel
with 100 pF
Device off
AI+ to AI GND ......................820
AI– to AI GND.......................820
Input bias current.............................±100 pA
Crosstalk (at 100 kHz)
Adjacent channels.......................–75 dB
Non-adjacent channels................–95 dB
Small signal bandwidth (–3 dB) ...... 1.7 MHz
Input FIFO size................................4,095 samples
Scan list memory.............................4,095 entries
Data transfers
NI PCIe-6351/6353.....................DMA (scatter-gather),
programmed I/O
NI USB-6351/6353.....................USB Signal Stream,
programmed I/O
Overvoltage protection (AI <0..31>, AI SENSE, AI SENSE 2)
Device on ....................................±25 V for up to
two AI pins
Device off ...................................±15 V for up to
two AI pins
Input current during
overvoltage condition......................±20 mA max/AI pin

Settling Time for Multichannel Measurements Typical Performance Graphs

Settling Error Versus Time for Different Source Impedances
1 10 100
Time (μs)
Error (ppm of Step Size)
10
100
1 K
10 K
100 Ω
5 kΩ 10 kΩ
2 kΩ
1 kΩ
AI <0..31> Small Signal Bandwidth
–8
–7
–6
–5
–4
–3
–2
–1
0
1
1 k 10 k 100 k 1000 k 10000 k
Frequency (Hz)
Normalized Signal Amplitude (dB)
AI <0..31> CMRR
40
50
60
70
80
90
100
110
120
130
10 100 1 k 10 k 100 k
Frequency (Hz)
CMRR (dB)
10 V Range
5 V Range
0.1 V Range
Range
±10 V, ±5 V,
±60 ppm of Ste p
(±4 LSB for
Full Scale Step)
1 s 1.5 s
±15 ppm of Step
(±1 LSB for
Full Scale Step)
±2 V, ±1 V
±0.5 V 1.5 s 2 s
±0.2 V, ±0.1 V 2 s 8 s
NI 6351/6353 Specifications 2 ni.com

Analog Triggers

Number of triggers.......................... 1
Source
NI 6351.......................................AI <0..15>, APFI 0
NI 6353.......................................AI <0..31>, APFI <0..1>
Functions......................................... Start Trigger,
Reference Trigger, Pause Trigger, Sample Clock, Convert Clock, Sample Clock Timebase
Source level
AI <0..31> .................................. ±full scale
APFI <0..1>................................ ±10 V
Resolution .......................................16 bits
Modes.............................................. Analog edge triggering,
analog edge triggering with hysteresis, and analog window triggering
Bandwidth (–3 dB)
AI <0..31> .................................. 3.4 MHz
APFI <0..1>................................ 3.9 MHz
Accuracy .........................................±1% of range
APFI <0..1> characteristics
Input impedance ......................... 10 k
Coupling .....................................DC
Protection
Power on ................................ ±30 V
Power off................................±15 V

Analog Output

Number of channels
NI 6351.......................................2
NI 6353.......................................4
DAC resolution...............................16 bits
DNL ................................................ ±1 LSB
Monotonicity...................................16 bit guaranteed
Accuracy ......................................... Refer to the AO Absolute
Accuracy Table
Maximum update rate
1 channel.....................................2.86 MS/s
2 channels ...................................2.00 MS/s
3 channels ...................................1.54 MS/s
4 channels ...................................1.25 MS/s
Timing accuracy..............................50 ppm of sample rate
Timing resolution............................10 ns
Output range....................................±10 V, ±5 V, ±external
reference on APFI <0..1>
Output coupling...............................DC
Output impedance ...........................0.2
Output current drive ........................±5 mA
Overdrive protection .......................±25 V
Overdrive current ............................26 mA
Power-on state.................................±5 mV
Power-on/off glitch
NI PCIe-6351/6353.....................1.5 V peak for 200 ms
NI USB-6351/6353.....................1.5 V for 1.2 s
Output FIFO size.............................8,191 samples shared
among channels used
Data transfers
NI PCIe-6351/6353.....................DMA (scatter-gather),
programmed I/O
NI USB-6351/6353.....................USB Signal Stream,
programmed I/O
AO waveform modes:
• Non-periodic waveform
• Periodic waveform regeneration mode from onboard FIFO
• Periodic waveform regeneration from host buffer including dynamic update
Settling time, full scale step
15 ppm (1 LSB)...............................2 s
Slew rate..........................................20 V/s
Glitch energy at midscale transition,
±10 V range.....................................10 nV  s
1
1
Typical behavior. Time period may be longer due to host system USB performance. Time period will be longer during firmware updates.
© National Instruments Corporation 3 NI 6351/6353 Specifications

External Reference

AO <0..3> Analog Output External Reference Bandwidth
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
10
100
1k 10 k 100 k 1 M
Frequency (Hz)
Normalized AO Amplitude
Attenuation (dB)
DAC Output CODE (HEX)
8003
800F
803F
80FF
83FF
8FFF
BFFF
FFFF
APFI <0..1> characteristics
Input impedance..........................10 k
Coupling......................................DC
Protection
Power on.................................±30 V
Power off ................................±15 V
Range...............................................±11 V
Slew rate..........................................20 V/s

Calibration (AI and AO)

Recommended warm-up time .........15 minutes
Calibration interval..........................2 years
NI 6351/6353 Specifications 4 ni.com
NoiseUncertainty
RandomNoise 3
10,000
-----------------------------------------=
NoiseUncertainty
281 V3
10,000
--------------------------=
1
Accuracy at
Random
INL Error
Tem pc o
Offset Error
Reference
Full Scale
Noise,
(ppm of
(ppm of
(ppm of
Tem pc o
(V)
(Vrms)
Range)
Range/°C)
Range)
(ppm/°C)
Absolute
Offset
Residual
and averaging 10,000 points.
V
Gain
Tem pc o
(ppm/°C)
(ppm of
Reading)
Gain Error
Negative
Full Scale
Nominal Range Residual
Positive
Full Scale

AI Absolute Accuracy Table

10 –10 48 13 1 13 21 46 281 1520
5 –5 55 13 1 13 21 46 137 800
2 –2 55 13 1 13 24 46 56 320
1 –1 65 13 1 17 27 46 35 180
0.5 –0.5 68 13 1 17 34 46 26 95
0.2 –0.2 95 13 1 27 55 46 21 50
0.1 –0.1 108 13 1 45 90 46 16 32
AbsoluteAccuracy = Reading · (GainError) + Range · (OffsetError) + NoiseUncertainty
© National Instruments Corporation 5 NI 6351/6353 Specifications
For a coverage factor of 3
NoiseUncertainty = 8.4
TempChangeFromLastExternalCal = 10 °C
TempChangeFromLastInternalCal = 1 °C
number_of_readings = 10,000
CoverageFactor = 3
GainError = 48 ppm + 13 ppm · 1 + 1 ppm · 10 GainError = 71 ppm
GainError = ResidualGainError + GainTempco · (TempChangeFromLastInternalCal) + ReferenceTempco · (TempChangeFromLastExternalCal)
OffsetError = ResidualOffsetError + OffsetTempco · (TempChangeFromLastInternalCal) + INL_Error
Absolute accuracy at full scale on the analog input channels is determined using the following assumptions:
1
OffsetError = 13 ppm + 21 ppm · 1 + 46 ppm OffsetError = 80 ppm
For example, on the 10 V range, the absolute accuracy at full scale is as follows:
AbsoluteAccuracy = 10 V · (GainError) + 10 V · (OffsetError) + NoiseUncertainty AbsoluteAccuracy = 1,520 V
Accuracies listed are valid for up to two years from the device external calibration.
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