NI USB-443x Specifications

NI USB-443x Specifications
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This document lists specifications for the NI USB-443x devices. The specifications apply to both the
NI USB-4431 and NI USB-4432 unless otherwise noted. These specifications are typical at 25 °C
unless otherwise stated. All specifications are subject to change without notice. Visit ni.com/
manuals for the most current specifications and product documentation.
Caution
The inputs of this sensitive test and measurement product are not protected for
electromagnetic interference for functional reasons. As a result, this product may experience reduced
measurement accuracy or other temporary performance degradation when cables are attached in an
environment with electromagnetic interference present. Refer to the Declaration of Conformity
(DoC) of this product for details of the standards applied to assess electromagnetic compatibility
performance. To obtain the DoC, visit ni.com/certification, search by model number or
product line, and click the appropriate link in the Certification column.
Caution
To ensure the specified EMC performance, operate this product only with shielded cables
and accessories.
Analog Input
Input channels
NI USB-4431 .................................................4
NI USB-4432 .................................................5
Input connector ......................................................1 BNC per channel
PC communication.................................................USB 2.0
Power consumption................................................2.5 W max
ADC resolution ......................................................24 bits
ADC type ...............................................................Delta-sigma
Sampling mode ......................................................Simultaneous
Sample rates (fs )
Range .............................................................1 kS/s to 102.4 kS/s
Resolution1 2.10 mS/s
Internal frequency timebase accuracy....................±100 ppm max
1
Depends on the sample rate. Refer to the Sample Rate and Update Rate, Accuracy and Coercion section of the NI Dynamic
Signal Acquisition User Manual for more information.
Input range
NI USB-4431 .................................................±10 Vpk
NI USB-4432 .................................................±40 Vpk
FIFO buffer size .....................................................1,023 samples (shared between all channels)
Input coupling ........................................................AC or DC, each channel independently software
selectable
Input Impedance
Terminal
NI USB-4431 Input Impedance
NI USB-4432 Input Impedance
Between positive input and negative
input
200 k || 130 pF
800 k || 120 pF
Between negative input and chassis
ground
1 k
1 k
Absolute Maximum Input Voltage
Input
Voltage (Vpk)*
Positive terminal (+)
±60
Negative terminal (–)
±10
Notes: Voltages above those listed in this table may cause permanent damage to the device.
This is a stress rating only; specifications for the device are only valid when it is operated within its listed input
range.
*
Voltages with respect to chassis ground.
AI Gain Accuracy (NI USB-4431)
Temperature Range
Amplitude Accuracy
(AC at 1 kHz)* †
Amplitude Accuracy
(DC)*
±0.025 dB typ
±0.15% typ
±0.032 dB max
±0.3% max
±0.052 dB max
±0.5% max
10 °C to 40 °C
–30 °C to 70 °C
*
For sample rates lower than 40 kS/s, add 0.01 dB of AC error and 0.1% of DC error to both typical and
maximum specifications.
†
Applies to both AC and DC coupling.
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AI Gain Accuracy (NI USB-4432)
Temperature Range
Amplitude Accuracy
(AC at 1 kHz)*
Amplitude Accuracy
(DC)*
±0.025 dB typ
±0.25% typ
±0.035 dB max
±0.35% max
±0.055 dB max
±0.65% max
10 °C to 40 °C
–30 °C to 70 °C
*
For sample rates lower than 40 kS/s, add 0.06 dB of AC error and 0.25% of DC error to both typical and
maximum specifications.
AI interchannel gain mismatch (–30 °C to 70 °C)
NI USB-4431 .................................................0.01 dB at 1 kHz
NI USB-4432 .................................................0.015 dB at 1 kHz
AI Offset
Temperature Range
NI USB-4431 Offset*
NI USB-4432 Offset*
±750 V typ
±2.6 mV typ
±2.25 mV max
±7 mV max
±6.25 mV max
±17 mV max
10 °C to 40 °C
–30 °C to 70 °C
*
Source impedance 1 . Offsets apply for both AC and DC coupling settings.
AI Frequency Response
AI Amplitude Flatness
Flatness*
Input Signal Frequency (fin)
±0.01 dB typ
20 Hz to 20 kHz
±0.02 dB max
±0.02 dB typ
20 Hz to 46.4 kHz
±0.05 dB max
* Relative
to 1 kHz
AI phase linearity
fin = 20 Hz to 20 kHz .....................................±0.01°
fin = 20 Hz to 46.4 kHz ..................................±0.05°
AI interchannel phase mismatch
(fin 100 Hz)...................................................0.02°/kHz · fin typ, 0.04°/kHz · fin max
–3 dB bandwidth ....................................................0.49 · fs
AC coupling
NI USB-4431
–3 dB cutoff frequency ..........................0.8 Hz
–0.1 dB cutoff frequency .......................6 Hz
© National Instruments Corporation
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NI USB-443x Specifications
NI USB-4432
–3 dB cutoff frequency ..........................0.1 Hz
–0.1 dB cutoff frequency .......................0.7 Hz
ADC filter delay (nominal)....................................39 samples
AI Distortion Plus Noise (NI USB-4431)
Input Signal Frequency (fin)
THD*
THD+N*
–99 dB typ
–90 dB typ
–93 dB max
–84 dB max
–93 dB typ
–86 dB typ
–87 dB max
–80 dB max
THD*
THD+N*
–97 dB typ
–92 dB typ
–91 dB max
–86 dB max
–95 dB typ
–91 dB typ
–89 dB max
–85 dB max
20 Hz to 20 kHz
20 Hz to 46.4 kHz
*
Vin = 8.9 Vpk
AI Distortion Plus Noise (NI USB-4432)
Input Signal Frequency (fin)
20 Hz to 20 kHz
20 Hz to 46.4 kHz
*
Vin = 8.9 Vpk
AI dynamic range (–60 dBFS, 1 kHz tone; fs = 102.4 kS/s)
NI USB-4431 .................................................100 dB typ, 98 dB min
NI USB-4432 .................................................101 dB typ, 99 dB min
AI spurious free dynamic range (SFDR)
(–1 dBFS, 1 kHz tone; fs = 102.4 kS/s)..........104 dB
AI non-harmonic SFDR
(–1 dBFS, 1 kHz tone; fs = 102.4 kS/s)..........110 dB
AI intermodulation distortion (IMD)
(CCIF 11 kHz + 12 kHz, 1:1, –6 dBFS) ........–100 dB
AI Noise
Measurement Bandwidth
20 kHz
46.4 kHz
NI USB-443x Specifications
NI USB-4431 Noise
NI USB-4432 Noise
55 Vrms typ
200 Vrms typ
75 Vrms max
240 Vrms max
75 Vrms typ
250 Vrms typ
100 Vrms max
300 Vrms max
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AI Common-Mode Rejection Ratio (CMRR)
AI CMRR (fin = 20 Hz to 1 kHz)
NI USB-4431 .................................................55 dB
NI USB-4432 .................................................45 dB
AI Crosstalk
*
fin
NI USB-4431*
NI USB-4432*
1 kHz
–110 dB
–105 dB
46.4 kHz
–90 dB
–80 dB
Source impedance 50 
IEPE Excitation
Channels.................................................................AI0, AI1, AI2, AI3
Current ...................................................................0 or 2.1 mA, each channel independently software
selectable
Compliance voltage ...............................................20 V min
Output impedance ..................................................200 kat 1 kHz
Current noise density .............................................25 pA/ Hz at 10 kHz
Fault detection
Thresholds......................................................<1.5 V (short),
>19.5 V (open)
Indication .......................................................Software, per channel
Transducer Electronic Data Sheet (TEDS) Support
Analog inputs AI<0..3> support Transducer Electronic Data Sheet (TEDS) according to the IEEE 1451
Standard.
For more information about TEDS, go to ni.com/info and enter the Info Code rdteds.
Maximum cable length ..........................................100 ft
Tachometer Inputs
You can use any analog input channel as a tachometer input.
Analog Output (NI USB-4431)
Output channels .....................................................1
AO signal connection.............................................BNC
AO frequency range ...............................................DC to 43.5 kHz
Internal frequency timebase accuracy....................±100 ppm max
DAC resolution ......................................................24 bits
DAC type ...............................................................Delta-sigma
Output signal range ................................................±3.5 Vpk
© National Instruments Corporation
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NI USB-443x Specifications
Output coupling .....................................................DC
Short circuit protection ..........................................Indefinite
Minimum working load .........................................1 k
Output impedance ..................................................50 
DAC filter delay1....................................................63.3 samples max
FIFO buffer size .....................................................4,095 samples
AO Update Rates
Available rates are expressed by the following equation:
fM /n
where
fM = {51.2 kS/s, 80 kS/s, 96 kS/s}, and
n = {1, 2, 4, 8, 16, 32, 64}
n
51.2 kS/s
80 kS/s
96 kS/s
1
51.2 kS/s
80 kS/s
96 kS/s
2
25.6 kS/s
40 kS/s
48 kS/s
4
12.8 kS/s
20 kS/s
24 kS/s
8
6.4 kS/s
10 kS/s
12 kS/s
16
3.2 kS/s
5 kS/s
6 kS/s
32
1.6 kS/s
2.5 kS/s
3 kS/s
64
800 S/s
1.25 kS/s
1.5 kS/s
AO Gain Accuracy
Temperature Range
Amplitude Accuracy
(AC at 1 kHz)
Amplitude Accuracy
(DC)
±0.025 dB typ
±0.2% typ
±0.045 dB max
±0.4% max
±0.1 dB max
±1.1% max
10 °C to 40 °C
–30 °C to 70 °C
AO Offset
Temperature Range
Offset (DC)
±700 V typ
10 °C to 40 °C
±2 mV max
–30 °C to 70 °C
1
±6.5 mV max
Refer to the Filter Delay section of the NI Dynamic Signal Acquisition User Manual for more information.
NI USB-443x Specifications
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AO Frequency Response
AO phase linearity
fout = DC to 20 kHz ........................................±0.25°
fout = DC to 43.5 kHz .....................................±2.5°
AO Amplitude Flatness
Output Signal Frequency (fout)
Flatness*
±0.05 dB typ
DC to 20 kHz
±0.09 dB max
±0.3 dB typ
DC to 43.5 kHz
±0.4 dB max
* Relative
to 1 kHz
AO Distortion and Noise
Note
Specifications for the listed update rates also apply to their respective derivative rates as listed
in the AO Update Rates section.
AO Distortion
Update Rate*
THD†
(1 kHz)
THD†
(20 Hz to 20 kHz)
51.2 kS/s
–100 dB typ
–89 dB max
80 kS/s
–97 dB typ
–86 dB max
96 kS/s
–95 dB typ
–85 dB max
Note: The measurement bandwidth is 0 Hz to 0.453 × the Update Rate.
* Refer to the note under the AO Distortion and Noise section for applicability to other update rates.
†V
out
= 3.1 Vpk
AO Distortion Plus Noise
THD+N†
(1 kHz)
THD+N†
(20 Hz to 20 kHz)
51.2 kS/s
–92 dB typ
–86 dB max
80 kS/s
–91 dB typ
–84 dB max
96 kS/s
–90 dB typ
–82 dB max
Update
Rate*
Note: The measurement bandwidth is 0 Hz to 0.453 × the Update Rate.
*
Refer to the note under the AO Distortion and Noise section for applicability to other update rates.
†V
out
= 3.1 Vpk
© National Instruments Corporation
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NI USB-443x Specifications
AO Noise
Update Rate*
Noise
90 Vrms typ
51.2 kS/s
120 Vrms max
100 Vrms typ
80 kS/s
150 Vrms max
120 Vrms typ
96 kS/s
200 Vrms max
Note: The measurement bandwidth is 0 Hz to 0.453 × the Update Rate.
*
Refer to the note under the AO Distortion and Noise section for applicability to other update rates.
AO Spurious Free Dynamic Range (Includes Harmonics)
Update Rate*
SFDR (–1 dBFS, 1 kHz)
51.2 kS/s
102 dB
80 kS/s
98 dB
96 kS/s
96 dB
Note: The measurement bandwidth is 0 Hz to 0.453 × the Update Rate.
*
Refer to the note under the AO Distortion and Noise section for applicability to other update rates.
AO Dynamic Range
Update Rate*
Dynamic Range†
89 dB typ
51.2 kS/s
86 dB min
88 dB typ
80 kS/s
84 dB min
86 dB typ
96 kS/s
82 dB min
Note: The measurement bandwidth is 0 Hz to 0.453 × the Update Rate.
*
Refer to the note under the AO Distortion and Noise section for applicability to other update rates.
†
Vout = –60 dBFS, 1 kHz
AO intermodulation distortion
(CCIF 11 kHz + 12 kHz, 1:1, –6 dBFS) ................–96 dB
NI USB-443x Specifications
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AO Transients
The following actions will result in a transient on the analog output:
•
Powering up the NI USB-4431
•
Changing between AO rates in different columns of the table in the AO Update Rates section
•
Changing the AI sample rate
Digital I/O Lines
Power-up mode ......................................................Inputs pulled low
Input protection......................................................+5.6 V/–0.5 V
Purpose...................................................................Start or reference trigger (importing only)
Source ....................................................................PFI<0..7>
Compatibility .........................................................Transistor-transistor logic (5V TTL)
Polarity...................................................................Rising or falling edge
Environment Specifications
Pollution degree .....................................................2
Maximum altitude..................................................2,000 m
Indoor use only.
Operating Environment
Operating temperature ...........................................–30 °C to 70 °C
(Tested in accordance with IEC-60068-2-1 and
IEC-60068-2-2.)
Relative humidity range .........................................0% to 95% RH, non-condensing
(Tested in accordance with IEC-60068-2-56.)
Storage Environment
Ambient temperature range ...................................–30 °C to 70 °C
(Tested in accordance with IEC-60068-2-1 and
IEC-60068-2-2.)
Calibration
External calibration interval...................................1 year
Warm-up time ........................................................15 minutes to rated specifications
General Specifications
Physical
Dimensions ............................................................142 mm × 180 mm × 38 mm
(5.6 in. × 7.1 in. × 1.5 in.)
Weight ....................................................................675 g (1.5 lbs)
© National Instruments Corporation
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NI USB-443x Specifications
Safety
This product meets the requirements of the following standards of safety for electrical equipment for
measurement, control, and laboratory use:
•
IEC 61010-1, EN 61010-1
•
UL 61010-1, CSA 61010-1
Note
For UL and other safety certifications, refer to the product label or the Online Product
Certification section.
Electromagnetic Compatibility
This product meets the requirements of the following EMC standards for electrical equipment for
measurement, control, and laboratory use:
•
EN 61326-2-1 (IEC 61326-2-1): Class A emissions; Basic immunity
•
EN 55011 (CISPR 11): Group 1, Class A emissions
•
AS/NZS CISPR 11: Group 1, Class A emissions
•
FCC 47 CFR Part 15B: Class A emissions
•
ICES-001: Class A emissions
Note
In the United States (per FCC 47 CFR), Class A equipment is intended for use in commercial,
light-industrial, and heavy-industrial locations. In Europe, Canada, Australia and New Zealand (per
CISPR 11) Class A equipment is intended for use only in heavy-industrial locations.
Note
Group 1 equipment (per CISPR 11) is any industrial, scientific, or medical equipment that
does not intentionally generates radio frequency energy for the treatment of material or
inspection/analysis purposes.
Note
For EMC declarations and certifications, and additional information, refer to the Online
Product Certification section.
CE Compliance
This product meets the essential requirements of applicable European Directives as follows:
•
2006/95/EC; Low-Voltage Directive (safety)
•
2004/108/EC; Electromagnetic Compatibility Directive (EMC)
Online Product Certification
Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance
information. To obtain product certifications and the DoC for this product, visit
ni.com/certification, search by model number or product line, and click the appropriate link in
the Certification column.
Environmental Management
NI is committed to designing and manufacturing products in an environmentally responsible manner.
NI recognizes that eliminating certain hazardous substances from our products is beneficial to the
environment and to NI customers.
For additional environmental information, refer to the NI and the Environment Web page at ni.com/
environment. This page contains the environmental regulations and directives with which NI
complies, as well as other environmental information not included in this document.
NI USB-443x Specifications
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Waste Electrical and Electronic Equipment (WEEE)
EU Customers
At the end of the product life cycle, all products must be sent to a WEEE recycling
center. For more information about WEEE recycling centers, National Instruments WEEE initiatives,
and compliance with WEEE Directive 2002/96/EC on Waste and Electronic Equipment,
visit ni.com/environment/weee.
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