USB-6349 Specifications

Definitions

Warranted specifications describe the performance of a model under stated operating conditions and are covered by the model warranty.

Characteristics describe values that are relevant to the use of the model under stated operating conditions but are not covered by the model warranty.

  • Typical specifications describe the performance met by a majority of models.
  • Nominal specifications describe an attribute that is based on design, conformance testing, or supplemental testing.

Specifications are Typical unless otherwise noted.

Conditions

Specifications are valid for 25 °C unless otherwise noted.

Analog Input

Note Floating inputs can cause unnecessary power consumption and higher operating temperatures. NI recommends connecting unused analog input channels to AI GND.

Number of channels

32 differential

ADC resolution

16 bits

DNL

No missing codes, warranted

INL

Refer to the AI Absolute Accuracy section.

Sample rate (simultaneous sampling on all channels sampled)

Maximum

500 kS/s

Minimum

No minimum

Timing resolution

10 ns

Timing accuracy

50 ppm of sample rate

Input coupling

DC

Input range

±1 V, ±2 V, ±5 V, ±10 V

Maximum working voltage for all analog inputs (AI±)

Ranges ±10 V, ±5 V

±11 V, Measurement Category I

Ranges ±2 V, ±1 V

±9 V, Measurement Category I

Caution Do not connect the USB-6349 to signals or use for measurements within Measurement Categories II, III, or IV.
Attention Ne connectez pas le USB-6349 à des signaux et ne l'utilisez pas pour effectuer des mesures dans les catégories de mesure II, III ou IV.

CMRR (at 60 Hz)

80 dB

Bandwidth (small signal)

2.0 MHz at ±1 V

2.9 MHz at other ranges

Input impedance
Device on

AI+ to AI GND

>1 GΩ in parallel with 18 pF

AI- to AI GND

>1 GΩ in parallel with 18 pF

Device off

AI+ to AI GND

2.37 kΩ

AI- to AI GND

2.37 kΩ

Input bias current

±6 nA

±90 nA, maximum over full temperature range

Crosstalk (at 100 kHz)

-80 dB

Input FIFO size

32 MS shared among channels used

Data transfers

USB Signal Stream, programmed I/O

Overvoltage protection for AI <0..31>

Device on

±30 V

Device off

±15 V

Input current during overvoltage conditions

±6.3 mA maximum/AI pin

Maximum AI channels in overvoltage

4 channels on AI <0..15> and 4 channels on AI <16..31>

Notice Exceeding overvoltage specifications may result in data corruption on non-overvoltaged channels.

Analog Triggers

Number of triggers

1

Source

AI <0..31>, APFI 0

Functions

Start Trigger, Reference Trigger, Pause Trigger, Sample Clock, Sample Clock Timebase

Source level

AI <0..31>

±Full scale

APFI 0

±10 V

Resolution

16 bits

Modes

Analog edge triggering, analog edge triggering with hysteresis, and analog window triggering

Bandwidth (large signal, to -3 dB)

AI <0..31>

600 kHz

APFI 0

3.9 MHz

Accuracy

±1% of range

APFI 0 characteristics

Input impedance

10 kΩ

Coupling

DC

Protection, power on

±30 V

Protection, power off

±15 V

AI Absolute Accuracy

Table 1. AI Absolute Accuracy
Nominal Range Positive Full Scale Nominal Range Negative Full Scale Residual Gain Error (ppm of Reading) Offset Tempco (ppm of Range/°C) Random Noise, σ (μVrms) Absolute Accuracy at Full Scale (μV)
10 -10 115 2 265 3,225
5 -5 115 2 148 1,613
2 -2 117 2 74 650
1 -1 124 3 50 333
Note For more information about absolute accuracy at full scale, refer to the AI Absolute Accuracy Example section.

Gain tempco

16.7 ppm/°C

Reference tempco

5 ppm/°C

Residual offset error

12 ppm of range

INL error

126 ppm of range

Note Accuracies listed are warranted for up to one year from the device external calibration when the device is within 10 °C of the external calibration temperature and 1 °C of the last self calibration, when averaging 10,000 DC samples. Other accuracies may be calculated for different temperatures and sample sizes using the given equations.
Notice This product may become more sensitive to electromagnetic disturbances in the operational environment when test leads are attached or when connected to a test object.

AI Absolute Accuracy Equation

AbsoluteAccuracy = Reading · (GainError) + Range · (OffsetError) + NoiseUncertainty

  • GainError = ResidualGainError + GainTempco · (TempChangeFromLastInternalCal) + ReferenceTempco · (TempChangeFromLastExternalCal)
  • OffsetError = ResidualOffsetError + OffsetTempco · (TempChangeFromLastInternalCal) + INLError
  • NoiseUncertainty =
    RandomNoise310,000
    for a coverage factor of 3 σ and averaging 10,000 points.

AI Absolute Accuracy Example

Absolute accuracy at full scale on the analog input channels is determined using the following assumptions:

  • TempChangeFromLastExternalCal = 10 °C
  • TempChangeFromLastInternalCal = 1 °C
  • number_of_readings = 10,000
  • CoverageFactor = 3 σ

For example, on the 10 V range, the absolute accuracy at full scale is as follows:

  • GainError = 115 ppm + 16.7 ppm · 1 + 5 ppm · 10 = 181.7 ppm
  • OffsetError = 12 ppm + 2 ppm ·1 + 126 ppm = 140 ppm
  • Noise Uncertainty =
    265μV310,000
    = 8 µV
  • AbsoluteAccuracy = 10 V · (GainError) + 10 V · (OffsetError) + NoiseUncertainty = 3225 µV

Analog Output

Number of channels

2

DAC resolution

16 bits

DNL

±1 LSB, maximum

Monotonicity

16 bit guaranteed

Accuracy

Refer to the AO Absolute Accuracy section.

Maximum update rate (simultaneous)

1 channel

900 kS/s

2 channels

840 kS/s

Minimum update rate

No minimum

Timing accuracy

50 ppm of sample rate

Timing resolution

10 ns

Output range

±10 V

Output coupling

DC

Output impedance

0.2 Ω

Output current drive

±5 mA

Overdrive protection

±15 V

Overdrive current

15 mA

Power-on state

±20 mV

Power-on/off glitch[1]

2 V peak for 1.5 s

Output FIFO size

8,191 samples shared among channels used

Data transfers

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)

6 µs

Slew rate

15 V/µs

Glitch energy at midscale transition

100 mV · 2.6 µs

AO Absolute Accuracy

Accuracies listed are warranted for up to one year from the device external calibration when the device is within 10 °C of the external calibration temperature and 1 °C of the last self calibration.

Table 2. AO Absolute Accuracy
Nominal Range Positive Full Scale Nominal Range Negative Full Scale Residual Gain Error (ppm of Reading) Gain Tempco (ppm/°C) Reference Tempco (ppm/°C) Residual Offset Error (ppm of Range) Offset Tempco (ppm of Range/°C) INL Error (ppm of Range) Absolute Accuracy at Full Scale (μV)
10 -10 130 11.3 5 52 4.8 128 3,761

AO Absolute Accuracy Equation

AbsoluteAccuracy = OutputValue ⋅ (GainError) + Range ⋅ (OffsetError)

  • GainError = ResidualGainError + GainTempco ⋅ (TempChangeFromLastInternalCal) + ReferenceTempco ⋅ (TempChangeFromLastExternalCal)
  • OffsetError = ResidualOffsetError + OffsetTempco ⋅ (TempChangeFromLastInternalCal) + INLError

Digital I/O/PFI

Static Characteristics

Number of channels

24 total

8 (P0.<0..7>)

16 (PFI <0..7>/P1, PFI <8..15>/P2)

Ground reference

D GND

Direction control

Each terminal individually programmable as input or output

Pull-down resistor

50 kΩ, typical

20 kΩ, minimum

Input voltage protection

±20 V on up to two pins

Notice Stresses beyond those listed under the Input voltage protection specification may cause permanent damage to the device.

Waveform Characteristics (Port 0 Only)

Terminals used

Port 0 (P0.<0..7>)

Port/sample size

Up to 8 bits

Waveform generation (DO) FIFO

2,047 samples

Waveform acquisition (DI) FIFO

255 samples

DI Sample Clock frequency

0 to 1 MHz, system and bus activity dependent

DO Sample Clock frequency

Regenerate from FIFO

0 to 1 MHz

Streaming from memory

0 to 1 MHz, system and bus activity dependent

Data transfers

USB Signal Stream, programmed I/O

Digital line filter settings

160 ns, 10.24 μs, 5.12 ms, disable

PFI/Port 1/Port 2 Functionality

Functionality

Static digital input, static digital output, timing input, timing output

Timing output sources

Many AI, AO, counter, DI, DO timing signals

Debounce filter settings

90 ns, 5.12 µs, 2.56 ms, custom interval, disable; programmable high and low transitions; selectable per input

Recommended Operating Conditions

Input high voltage (VIH)

Minimum

2.2 V

Maximum

5.25 V

Input low voltage (VIL)

Minimum

0 V

Maximum

0.8 V

Output high current (IOH)

P0.<0..7>

-24 mA, maximum

PFI <0..15>/P1/P2

-16 mA, maximum

Output low current (IOL)

P0.<0..7>

24 mA, maximum

PFI <0..15>/P1/P2

16 mA, maximum

Digital I/O Characteristics

Positive-going threshold (VT+)

2.2 V, maximum

Negative-going threshold (VT-)

0.8 V, minimum

Delta VT hysteresis (VT+ - VT-)

0.2 V , minimum

IIL input low current (VIN = 0 V)

-10 μA, maximum

IIH input high current (VIN = 5 V)

250 μA, maximum

Figure 1. P0.<0..7>: IOH versus VOH

1378

Figure 2. P0.<0..7>: IOL versus VOL

1378

Figure 3. PFI <0..15>/P1/P2: IOH versus VOH

1378

Figure 4. PFI <0..15>/P1/P2: IOL versus VOL

1378

General-Purpose Counters

Number of counter/timers

4

Resolution

32 bits

Counter measurements

Edge counting, pulse, pulse width, semi-period, period, two-edge separation

Position measurements

X1, X2, X4 quadrature encoding with Channel Z reloading; two-pulse encoding

Output applications

Pulse, pulse train with dynamic updates, frequency division, equivalent time sampling

Internal base clocks

100 MHz, 20 MHz, 100 kHz

External base clock frequency

0 MHz to 25 MHz

Base clock accuracy

50 ppm

Inputs

Gate, Source, HW_Arm, Aux, A, B, Z, Up_Down, Sample Clock

Routing options for inputs

Any PFI, many internal signals

FIFO

127 samples per counter

Data transfers

USB Signal Stream, programmed I/O

Frequency Generator

Number of channels

1

Base clocks

20 MHz, 10 MHz, 100 kHz

Divisors

1 to 16

Base clock accuracy

50 ppm

Output can be available on any PFI terminal.

Phase-Locked Loop (PLL)

Number of PLLs

1

Table 3. Reference Clock Locking Frequencies
Reference Signal USB Locking Input Frequency
PFI <0..15> 10 MHz

Output of PLL

100 MHz Timebase; other signals derived from 100 MHz Timebase including 20 MHz and 100 kHz Timebases

External Digital Triggers

Source

Any PFI

Polarity

Software-selectable for most signals

Analog input function

Start Trigger, Reference Trigger, Pause Trigger, Sample Clock, Convert Clock, Sample Clock Timebase

Analog output function

Start Trigger, Pause Trigger, Sample Clock, Sample Clock Timebase

Counter/timer functions

Gate, Source, HW_Arm, Aux, A, B, Z, Up_Down, Sample Clock

Digital waveform generation (DO) function

Start Trigger, Pause Trigger, Sample Clock, Sample Clock Timebase

Digital waveform acquisition (DI) function

Start Trigger, Reference Trigger, Pause Trigger, Sample Clock, Sample Clock Timebase

Bus Interface

USB compatibility[2]

USB 2.0 Hi-Speed or full-speed

DMA channels

8 (can be used for analog input, analog output, digital input, digital output, counter/timer 0, counter/timer 1, counter/timer 2, counter/timer 3)

Power Requirements

Caution The protection provided by the USB-6349 can be impaired if it is used in a manner not described in the user documentation.
Attention La protection apportée par le USB-6349 risque d'être endommagée s'il est utilisé d'une autre façon que celle décrite dans la documentation utilisateur.

Power supply requirements

11 V DC to 30 V DC, 30 W, 2 positions 3.5 mm pitch pluggable screw terminal with screw locks similar to Phoenix Contact MC 1,5/2-STF-3,5 BK

Power input mating connector

Phoenix Contact MC 1,5/2-GF-3,5 BK or equivalent

Caution The USB-6349 must be powered with an AC adapter offered by NI or a National Electric Code (NEC) Class 2 DC source that meets the power requirements for the device and has appropriate safety certification marks for country of use.
Attention Le USB-6349 doit être alimenté par un adaptateur secteur proposé par NI ou une source de courant continu de classe 2, selon la norme NEC (National Electric Code), qui répond aux exigences d'alimentation de l'appareil et possède les marques de certification de sécurité appropriées pour le pays d'utilisation.

Current Limits

Notice Exceeding the current limits may cause unpredictable device behavior.

+5 V terminal (connector 0)

1 A, maximum

Note Connector 0 has a self-resetting fuse that opens when current exceeds this specification.

P0/PFI/P1/P2 and +5 V terminals combined

1.2 A, maximum

Physical Characteristics

Enclosure dimensions (includes connectors)

26.4 cm × 17.3 cm × 3.6 cm (10.39 in. × 6.81 in. × 1.42 in.)

Weight

1.45 kg (3 lb 3 oz)

I/O connectors

128 screw terminals

Screw terminal wire gauge

0.2 mm2 to 1.3 mm2 (24 AWG to 16 AWG)

Calibration

Recommended warm-up time

15 minutes

Calibration interval

1 year

Maximum Working Voltage

Maximum working voltage refers to the signal voltage plus the common-mode voltage.

Channel to earth

11 V, Measurement Category I

Caution Do not connect the USB-6349 to signals or use for measurements within Measurement Categories II, III, or IV.
Attention Ne connectez pas le USB-6349 à des signaux et ne l'utilisez pas pour effectuer des mesures dans les catégories de mesure II, III ou IV.

Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply system that powers equipment. This category is for measurements of voltages from specially protected secondary circuits. Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits powered by regulated low-voltage sources, and electronics.

Note Measurement Categories CAT I and CAT O are equivalent. These test and measurement circuits are for other circuits not intended for direct connection to the MAINS building installations of Measurement Categories CAT II, CAT III, or CAT IV.

Environmental Guidelines

Notice This model is intended for use in indoor applications only.

Environmental Characteristics

Temperature

Operating

0 °C to 45 °C

Storage

-40 °C to 70 °C

Humidity

Operating

10% to 90% RH, noncondensing

Storage

5% to 95% RH, noncondensing

Pollution Degree

2

Maximum altitude

2,000 m (800 mbar) (at 25 °C ambient temperature)

1 Typical behavior. Time period may be longer due to host system USB performance. Time period will be longer during firmware updates.

2 Operating on a full-speed bus results in lower performance, and you might not be able to achieve maximum sampling/update rates.