PXIe-7861 Specifications
- Updated2025-01-30
- 11 minute(s) read
PXIe-7861 Specifications
Conditions
The following specifications are typical at 25 °C unless otherwise noted.
Pinout
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.
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 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 | ||||||
|
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.
- TempChangeFromLastExternalCal = 10 °C
- TempChangeFromLastInternalCal = 1 °C
- number_of_readings = 10,000
- CoverageFactor = 3 σ
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 |
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
|
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 | ||||||
| |||||||
Power-on state | User-configurable | ||||||
Power-on glitch | 1 V for 4 µs | ||||||
Power-down glitch | 1 V for 200 µs |
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.
- TempChangeFromLastExternalCal = 10 °C
- TempChangeFromLastInternalCal = 1 °C
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 |
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
Refer to the following equation for an example of calculating absolute accuracy for a 10 V reading.
- TempChangeFromLastExternalCal = 10 °C
- TempChangeFromLastInternalCal = 1 °C
DC Transfer Characteristics
INL | Refer to the AO Accuracy Table |
DNL | ±0.5 LSB typical, ±1 LSB maximum |
Monotonicity | 16 bits, guaranteed |
Dynamic Characteristics
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
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 |
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 |
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 |
| |||||||
Output impedance | 50 Ω | ||||||
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.
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 |
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.
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
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
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.) | ||||||
|
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
电子信息产品污染控制管理办法(中国RoHS)
Calibration
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
In This Section
- Conditions
- Pinout
- Analog Input
- Analog Output
- Digital I/O
- Reconfigurable FPGA
- Onboard DRAM
- Synchronization Resources
- Bus Interface
- Power Requirements
- Physical Characteristics
- Safety Voltages
- Safety Compliance Standards
- Electromagnetic Compatibility
- CE Compliance
- Product Certifications and Declarations
- Shock and Vibration
- Environmental
- Environmental Management
- Calibration
- NI Services