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
32 single ended
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.