NI-9381 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 the range -40 °C to 70 °C unless otherwise noted.

NI-9381 Pinout



Table 1. Signal Descriptions
Signal Description
AI Analog input signal connection
AO Analog output signal connection
DIO Digital input/output signal connection
GND Ground connection

Analog Input

Number of channels

8 single-ended channels

ADC resolution

12 bits

Type of ADC

Successive approximation register (SAR)

Input range

0 V to 5 V ±1%

DNL

±1.25 LSB

Conversion time

50 µs (20 kS/s)

Input coupling

DC

Input impedance

1 MΩ in parallel with 50 pF

Bandwidth

1 kHz

Stability

Gain drift

80 ppm/°C

Offset drift

85 µV/°C

Table 3. Accuracy[1]1 Accuracy is impacted for AC signals by an amount equal to 4.0f μV, where f is the signal frequency in hertz
Measurement Conditions Percent of Reading (Gain Error) Percent of Range (Offset Error)
Calibrated Maximum (-40 °C to 70 °C) ±0.70% ±13 mV
Typical (23 °C, ±5 °C) ±0.15% ±6.5 mV
Uncalibrated[2]2 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data. Maximum (-40 °C to 70 °C) ±1.00% ±16 mV
Typical (23 °C, ±5 °C) ±0.50% ±7.5 mV

Analog Output

Number of channels

8 channels

DAC resolution

12 bits

Type of DAC

String

Startup voltage

0 V

Output range

0 V to 5 V ±1%

Current drive

±1 mA

Output impedance

5 Ω

Update time

50 µs (20 kS/s)

Short-circuit protection

Indefinitely

Slew rate

30 V/ms

Settling time

900 µs

DNL

±1 LSB

Capacitive drive

1,500 pF

Stability

Gain drift

85 ppm/°C

Offset drift

180 µV/°C

Table 3. Accuracy[3]3 Accuracy is impacted for AC signals by an amount equal to 4.0f μV, where f is the signal frequency in hertz
Measurement Conditions Percent of Reading (Gain Error) Percent of Range (Offset Error)
Calibrated Maximum (-40 °C to 70 °C) ±1.02% ±23.5 mV
Typical (23 °C, ±5 °C) ±0.19% ±5 mV
Uncalibrated[4]4 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data. Maximum (-40 °C to 70 °C) ±1.9% ±50 mV
Typical (23 °C, ±5 °C) ±0.6% ±10 mV

Digital Input/Output

Number of channels

4 channels

Default power-on line direction

Input

Input/output type

LVTTL, single-ended

Digital logic levels

Maximum input voltage

5.2 V

Input high, VIH

2 V

Input low, VIL

0.8 V

Output high, VOH

Sourcing 100 µA

2.7 V

Output low, VOL

Sinking 100 µA

0.2 V

Maximum I/O switching frequency

1 MHz

Capacitive drive

100 pF

Safety Voltages

Isolation

Channel-to-channel

None

Channel-to-earth ground

None

Environmental Characteristics

Temperature

Operating

-40 °C to 70 °C

Storage

-40 °C to 85 °C

Humidity

Operating

10% RH to 90% RH, noncondensing

Storage

5% RH to 95% RH, noncondensing

Ingress protection

IP40

Pollution Degree

2

Maximum altitude

2,000 m

Shock and Vibration
Operating vibration

Random

5 g RMS, 10 Hz to 500 Hz

Sinusoidal

5 g, 10 Hz to 500 Hz

Operating shock

30 g, 11 ms half sine; 50 g, 3 ms half sine; 18 shocks at 6 orientations

To meet these shock and vibration specifications, you must panel mount the system.

Power Requirements

Power consumption from chassis

Active mode

600 mW maximum

Sleep mode

1 mW maximum

Thermal dissipation (at 70 °C)

Active mode

600 mW maximum

Sleep mode

1 mW maximum

Physical Characteristics

Dimensions

Visit ni.com/dimensions and search by module number.

Weight

145 g (5.1 oz)

1 Accuracy is impacted for AC signals by an amount equal to 4.0f μV, where f is the signal frequency in hertz

2 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data.

3 Accuracy is impacted for AC signals by an amount equal to 4.0f μV, where f is the signal frequency in hertz

4 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data.