PXIe-7861 Specifications

Conditions

The following specifications are typical at 25 °C unless otherwise noted.

Pinout



Table 1. PXIe-7861 Signal Descriptions
Signal Description
AI+ Positive analog input signal connection
AI- Negative analog input signal connection
AISENSE Reference connection for NRSE measurements
AIGND Ground reference for the analog input signal
AO Analog output signal connection
AOGND Ground reference for the analog output signal
DIO Digital input/output signal connection
DGND Ground reference for the digital signal
GND Ground connection
Supply (+5 Vout) 5 V power output connection for external devices
NC No connection

The PXIe-7861 is protected from overvoltage and overcurrent conditions.

Note The pinout label on the lid of the SCB-68A accessory is incompatible with the NI PXIe-7861. Refer to the NI 78xxR Pinout Labels for the SCB-68A, available at ni.com/manuals for the compatible pinout labels.

Analog Input

Number of channels

16

Input modes (software-selectable; selection applies to all channels)

DIFF, NRSE, RSE

Type of ADC

Successive approximation register (SAR)

Resolution

16 bits

Conversion time

1 µs

Maximum sampling rate (per channel)

1 MS/s

Input impedance

Powered on

1.25 GΩ ║ 2 pF

Powered off/overload

4 kΩ minimum

Input signal range (software-selectable)

±1 V, ±2 V, ±5 V, ±10 V

Input bias current

±5 nA

Input offset current

±5 nA

Input coupling

DC

Overvoltage protection

Powered on

±42 V maximum

Powered off

±35 V maximum

Table 2. AI Operating Voltage Ranges for Over Temperature
Range (V) Measurement Voltage, AI+ to AI- Maximum Working Voltage (Signal + Common Mode)
Minimum (V)[1]1 The minimum measurement voltage range is the largest voltage the NI PXIe-7861 is guaranteed to accurately measure. Typical (V) Maximum (V)
±10 ±10.37 ±10.5 ±10.63 ±12 V of ground
±5 ±5.18 ± 5.25 ±5.32 ±10 V of ground
±2 ±2.07 ±2.1 ±2.13 ±8.5 V of ground
±1 ±1.03 ±1.05 ±1.06 ±8 V of ground

AI Absolute Accuracy

Absolute accuracy at full scale numbers is valid immediately following internal calibration and assumes the device is operating within 10 °C of the last external calibration. Accuracies listed are valid for up to one year from the device external calibration.

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
Table 3. AI Absolute Accuracy (Calibrated)
Specifications Range
±10 V ±5 V ±2 V ±1 V
Residual Gain Error (ppm of Reading) 104.4 105.9 110.6 118.4
Gain Tempco (ppm/°C) 20 20 20 20
Reference Tempco (ppm/°C) 4 4 4 4
Residual Offset Error (ppm of Range) 16.4 16.4 16.4 16.4
Offset Tempco (ppm of Range/°C) 4.18 4.17 4.41 4.63
INL Error (ppm of range) 42.52 46.52 46.52 50.52
Random Noise, σ (µVrms) 263 156 90 74
Absolute Accuracy at Full Scale (µV) 2,283 1,170 479 252
Table 4. AI Absolute Accuracy (Uncalibrated)
Specifications Range
±10 V ±5 V ±2 V ±1 V
Residual Gain Error (ppm of Reading) 2,921 3,021 3,021 3,021
Gain Tempco (ppm/°C) 20 20 20 20
Reference Tempco (ppm/°C) 4 4 4 4
Residual Offset Error (ppm of Range) 661 671 700 631
Offset Tempco (ppm of Range/°C) 4.18 4.17 4.41 4.63
INL Error (ppm of range) 42.52 46.52 46.52 50.52
Random Noise, σ (µVrms) 263 156 90 74
Absolute Accuracy at Full Scale (µV) 36,895 19,018 7,667 3,769

DC Transfer Characteristics

INL

Refer to the AI Accuracy Table

DNL

±0.4 LSB typical, ±0.9 LSB maximum

No missing codes

16 bits guaranteed

CMRR, DC to 60 Hz

-100 dB

Dynamic Characteristics

Bandwidth

Small signal

1 MHz

Large signal

500 kHz

Table 5. Settling Time
Range (V) Step Size (V) Accuracy
±16 LSB ±4 LSB ±2 LSB
±10 ±20.0 1.50 µs 4.00 µs 7.00 µs
±2.0 0.50 µs 0.50 µs 1.00 µs
±0.2 0.50 µs 0.50 µs 0.50 µs
±5 ±10 1.50 µs 3.50 µs 7.50 µs
±1 0.50 µs 0.50 µs 1.00 µs
±0.1 0.50 µs 0.50 µs 0.50 µs
±2 ±4 1.00 µs 3.50 µs 8.00 µs
±0.4 0.50 µs 0.50 µs 1.00 µs
±0.04 0.50 µs 0.50 µs 0.50 µs
±1 ±2 1.00 µs 3.50 µs 12.00 µs
±0.2 0.50 µs 0.50 µs 2.00 µs
±0.02 0.50 µs 0.50 µs 0.50 µs

Crosstalk

-80 dB, DC to 100 kHz, at 50 Ω

Analog Output

Output type

Single-ended, voltage output

Number of channels

8

Resolution

16 bits

Update time

1 μs

Maximum update rate

1 MS/s

Type of DAC

Enhanced R-2R

Range

±10 V

Output coupling

DC

Output impedance

0.5 Ω

Current drive

±2.5 mA

Protection

Short circuit to ground

Overvoltage protection

Powered on

±15 V maximum

Powered off

±10 V maximum

Power-on state

User-configurable

Power-on glitch

1 V for 4 µs

Power-down glitch

1 V for 200 µs

Table 6. AO Operating Voltage Ranges for Over Temperature
Range (V) Measurement Voltage, AO+ to AO GND
Minimum (V)[2]2 The minimum measurement voltage range is the largest voltage the NI PXIe-7861 is guaranteed to accurately measure. Typical (V) Maximum (V)
±10 ±10.1 ±10.16 ±10.22

AO Absolute Accuracy

Absolute accuracy at full scale numbers is valid immediately following internal calibration and assumes the device is operating within 10 °C of the last external calibration. Accuracies listed are valid for up to one year from the device external calibration.

Absolute accuracy at full scale on the analog output channels is determined using the following assumptions:
  • TempChangeFromLastExternalCal = 10 °C
  • TempChangeFromLastInternalCal = 1 °C
Table 7. AO Absolute Accuracy (Calibrated)
Specifications ±10 V Range
Residual Gain Error (ppm of Reading) 87.3
Gain Tempco (ppm/°C) 12.6
Reference Tempco (ppm/°C) 4
Residual Offset Error (ppm of Range) 41.1
Offset Tempco (ppm of Range/°C) 7.8
INL Error (ppm of range) 61
Absolute Accuracy at Full Scale (µV) 2,498
Table 8. AO Absolute Accuracy (Uncalibrated)
Specifications ±10 V Range
Residual Gain Error (ppm of Reading) 2,968.6
Gain Tempco (ppm/°C) 12.6
Reference Tempco (ppm/°C) 4
Residual Offset Error (ppm of Range) 1,004.1
Offset Tempco (ppm of Range/°C) 7.8
INL Error (ppm of range) 61
Absolute Accuracy at Full Scale (µV) 40,941

Calculating Absolute Accuracy

AbsoluteAccuracy=OutputValue×(GainError)+Range×(OffsetError)
GainError=ResidualGainError+GainTempco×(TempChangeFromLastInternalCal)+ReferenceTempco×(TempChangeFromLastExternalCal)
OffsetError=ResidualGainError+AOOffsetTempco×(TempChangeFromLastInternalCal)+INL_Error

Refer to the following equation for an example of calculating absolute accuracy for a 10 V reading.

Absolute accuracy at full scale on the analog output channels is determined using the following assumptions:
  • TempChangeFromLastExternalCal = 10 °C
  • TempChangeFromLastInternalCal = 1 °C
GainError=87.3ppm+12.6ppm×1+4ppm×10
GainError=139.9ppm
OffsetError=41.1ppm+7.8ppm×1+61ppm
OffsetError=109.9ppm
AbsoluteAccuracy=10V×(GainError)+10V×(OffsetError)
AbsoluteAccuracy=2,498µV

DC Transfer Characteristics

INL

Refer to the AO Accuracy Table

DNL

±0.5 LSB typical, ±1 LSB maximum

Monotonicity

16 bits, guaranteed

Dynamic Characteristics

Table 9. Settling Time
Step Size (V) Accuracy
±16 LSB ±4 LSB ±2 LSB
±20.0 5.3 µs 6.5 µs 7.8 µs
±2.0 3.2 µs 3.9 µs 4.4 µs
±0.2 1.8 µs 2.8 µs 3.8 µs

Slew rate

10 V/µs

Noise

250 µV RMS, DC to 1 MHz

Glitch energy at midscale transition

±10 mV for 3 µs

5V Output

Output voltage

4.75 V to 5.1 V

Output current

0.5 A maximum

Overvoltage protection

±30 V

Overcurrent protection

650 mA

Digital I/O

Table 10. Channel Frequency
Connector Number of Channels Maximum Frequency
Connector 0 16 10 MHz
Connector 1 16 10 MHz

Compatibility

LVTTL, LVCMOS

Logic family

Fixed

Voltage level

3.3 V

Table 11. Digital Input Logic Levels
Logic Family Input Low Voltage (VIL) Maximum Input High Voltage (VIH) Minimum
3.3 V 0.80 V 2.00 V

Minimum input

-0.3 V

Maximum input

3.6 V

Input leakage current

±15 µA maximum

Input impedance

50 kΩ typical, pull-down

Table 12. Digital Output Logic Levels
Logic Family Current Output Low Voltage (VOL) Maximum Output High Voltage (VOH) Minimum
3.3 V 100 µA 0.20 V 3.00 V
4 mA 0.40 V 2.40 V
Maximum DC output current per channel

Source

4.0 mA

Sink

4.0 mA

Output impedance

50 Ω

Power-on state[3]3 Tristate by default.

Programmable, by line

Protection[4]4 NI recommends minimizing long-term over/under-voltage exposure to the Digital I/O. Prolonged DC voltage stresses that violate the maximum and minimum digital input voltage ratings may reduce device longevity. Over/under-voltage stresses are considered prolonged if the cumulative time in the abnormal condition exceeds 1 year.

±15 V, single line

Direction control of digital I/O channels

Per channel

Minimum I/O pulse width

50 ns

Minimum sampling period

5 ns

Reconfigurable FPGA

FPGA type

Kintex-7 160T

Number of flip-flops

202,800

Number of LUTs

101,400

Embedded Block RAM

11,700 kbits

Number of DSP48 slices

600

Timebase

40 MHz, 80 MHz, 120 MHz, 160 MHz, or 200 MHz

Default timebase

40 MHz

Timebase reference source

Onboard clock, phase-locked to PXI Express100 MHz (PXIe_CLK100)

Onboard clock timebase accuracy

±100 ppm, 250 ps peak-to-peak jitter

Data transfers

DMA, interrupts, programmed I/O

Onboard DRAM

Memory size

1 Bank; 512 MB

Maximum theoretical data rate

800 MB/s streaming

Synchronization Resources

Input/output source

PXI_Trig<0..7>

Input source

PXI_Star, PXIe_DStarA, PXIe_DStarB, PXI_Clk10, PXIe_Clk100

Output source

PXIe_DStarC

Bus Interface

Form factor

x4 PXI Express, specification v1.0 compliant

Slot compatibility

x4, x8, and x16 PXI Express or PXI Express hybrid slots

Data transfers

DMA, interrupts, programmed I/O

Number of DMA channels

16

Power Requirements

Power requirements are dependent on the digital output loads and configuration of the LabVIEW FPGA VI used in your application.

+3.3 V

3 A

+12 V

2 A

Physical Characteristics

If you need to clean the device, wipe it with a dry, clean towel.

Tip For two-dimensional drawings and three-dimensional models of the device and connectors, visit ni.com/dimensions and search by model number.

Dimensions

21.4 cm × 13.0 cm × 2.0 cm(8.43 in. × 5.1 in. × 0.8 in.)

Weight

171.1 g (6.04 oz)

I/O connectors

2 × 68-pin VHDCI

Safety Voltages

Connect only voltages that are below these limits.

Channel-to-earth

±12 V, Measurement Category I

Channel-to-channel

±24 V, Measurement Category I

Caution Do not connect the NI PXIe-7861 to signals or use for measurements within Measurement Categories II, III, or IV.
Attention Ne connectez pas le NI PXIe-7861 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.

Safety Compliance Standards

This product is designed to meet the requirements of the following electrical equipment safety standards for measurement, control, and laboratory use:

  • IEC 61010-1, EN 61010-1
  • UL 61010-1, CSA C22.2 No. 61010-1
Note For safety certifications, refer to the product label or the Product Certifications and Declarations section.

Electromagnetic Compatibility

This product meets the requirements of the following EMC standards for electrical equipment for measurement, control, and laboratory use:

  • EN 61326-1 (IEC 61326-1): 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 generate 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:

  • 2014/35/EU; Low-Voltage Directive (safety)
  • 2014/30/EU; Electromagnetic Compatibility Directive (EMC)

Product Certifications and Declarations

Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for NI products, visit ni.com/product-certifications, search by model number, and click the appropriate link.

Shock and Vibration

Operational shock

30 g PK, half-sine, 11 ms pulse (Tested in accordance with IEC 60068-2-27. Meets MIL-PRF-28800F Class 2 limits.)

Random vibration

Operating

5 Hz to 500 Hz, 0.3 g RMS (Tested in accordance with IEC 60068-2-64.)

Non-operating

5 Hz to 500 Hz, 2.4 g RMS (Tested in accordance with IEC 60068-2-64. Meets MIL-PRF-28800F Class 3.)

Environmental

Refer to the manual for the chassis you are using for more information about meeting these specifications.

Operating temperature (IEC 60068-2-1, IEC 60068-2-2)

0 °C to 55 °C

Storage temperature (IEC 60068-2-1, IEC 60068-2-2)

-40 °C to 71 °C

Operating humidity (IEC 60068-2-78)

10% RH to 90% RH, noncondensing

Storage humidity (IEC 60068-2-78)

5% RH to 95% RH, noncondensing

Pollution Degree

2

Maximum altitude

2,000 m

Indoor use only.

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 Engineering a Healthy Planet 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.

EU and UK Customers

  • Waste Electrical and Electronic Equipment (WEEE)—At the end of the product life cycle, all NI products must be disposed of according to local laws and regulations. For more information about how to recycle NI products in your region, visit ni.com/environment/weee.
  • 电子信息产品污染控制管理办法(中国RoHS)

  • 中国RoHSNI符合中国电子信息产品中限制使用某些有害物质指令(RoHS)。关于NI中国RoHS合规性信息,请登录 ni.com/environment/rohs_china。(For information about China RoHS compliance, go to ni.com/environment/rohs_china.)
  • Calibration

    Recommended warm-up time

    15 minutes

    Calibration interval

    1 year

    Onboard calibration reference

    DC level[5]5 Actual value stored in Flash memory

    5.000 V (±2 mV)

    Temperature coefficient

    ±4 ppm/°C maximum

    Long-term stability

    ±25 ppm/1,000 h

    Note Refer to Calibration Certifications at ni.com/calibration to generate a calibration certificate for the NI PXIe-7861

    NI Services

    Visit ni.com/support to find support resources including documentation, downloads, and troubleshooting and application development self-help such as tutorials and examples.

    Visit ni.com/services to learn about NI service offerings such as calibration options, repair, and replacement.

    Visit ni.com/register to register your NI product. Product registration facilitates technical support and ensures that you receive important information updates from NI.

    NI corporate headquarters is located at 11500 N Mopac Expwy, Austin, TX, 78759-3504, USA.

    1 The minimum measurement voltage range is the largest voltage the NI PXIe-7861 is guaranteed to accurately measure.

    2 The minimum measurement voltage range is the largest voltage the NI PXIe-7861 is guaranteed to accurately measure.

    3 Tristate by default.

    4 NI recommends minimizing long-term over/under-voltage exposure to the Digital I/O. Prolonged DC voltage stresses that violate the maximum and minimum digital input voltage ratings may reduce device longevity. Over/under-voltage stresses are considered prolonged if the cumulative time in the abnormal condition exceeds 1 year.

    5 Actual value stored in Flash memory