Product Introduction
The NI PXI-6284 is a high-accuracy M Series multifunction data acquisition (DAQ) module designed for precision measurement, automated test, laboratory research, design validation, and industrial data acquisition applications.
The PXI-6284 combines 32 single-ended or 16 differential analog inputs, 18-bit analog input resolution, sampling rates up to 500 kS/s, 4 analog outputs, 48 digital I/O lines, and two 32-bit counter/timers within a single PXI module.
Its primary advantage over standard 16-bit multifunction DAQ modules is higher analog measurement resolution and accuracy. This makes the PXI-6284 particularly suitable for applications where precision is more important than maximum acquisition speed.
Product Overview
The National Instruments PXI-6284 belongs to the NI high-accuracy M Series multifunction DAQ family.
The analog input subsystem provides up to 32 single-ended or 16 differential channels with 18-bit resolution. The module uses a multiplexed acquisition architecture and provides sampling rates up to 500 kS/s.
In addition to precision analog acquisition, the PXI-6284 integrates four analog outputs, 48 digital I/O lines, correlated digital I/O, two 32-bit counter/timers, and flexible triggering resources.
This multifunction architecture allows one PXI module to perform precision voltage acquisition, analog stimulus generation, digital control, frequency measurement, pulse generation, and synchronized automated testing.
Key Features
32 Analog Input Channels
The PXI-6284 provides a high analog input channel count for precision multi-signal measurement applications.
- 32 single-ended analog input channels
- 16 differential analog input channels
- 18-bit analog input resolution
- Multiplexed acquisition architecture
- Hardware-timed acquisition
- Programmable input ranges
Advantage: Engineers can acquire a large number of precision analog signals with one PXI module, reducing the amount of instrumentation required in automated test systems.
18-Bit Analog Input Resolution
One of the most important features of the PXI-6284 is its 18-bit analog input resolution.
- 18-bit ADC resolution
- 262,144 quantization levels
- High-accuracy voltage measurement
- Improved measurement resolution
- Suitable for low-level signal measurements
Advantage: Compared with conventional 16-bit multifunction DAQ hardware, 18-bit conversion provides finer voltage resolution and is better suited for precision measurement applications.
Up to 500 kS/s Analog Input Sampling
The PXI-6284 provides analog input sampling rates up to 500 kS/s.
- 500 kS/s maximum analog input sampling rate
- Hardware-timed acquisition
- Continuous waveform acquisition
- Multi-channel scanning
- Automated data collection
Advantage: The PXI-6284 balances high measurement resolution with sufficient sampling performance for many precision automated test and laboratory applications.
High-Accuracy Analog Measurements
The PXI-6284 is optimized for applications where measurement accuracy and resolution are more important than extremely high sampling speed.
- Precision voltage acquisition
- High-resolution measurements
- Accurate DC characterization
- Sensor signal acquisition
- Electronic device validation
Advantage: The high-accuracy architecture makes the PXI-6284 particularly useful for characterization and validation systems that require finer measurement resolution than standard 16-bit DAQ modules.
4 Analog Output Channels
The PXI-6284 provides four analog output channels for programmable signal generation and device control.
- 4 analog output channels
- Programmable voltage generation
- Waveform generation
- DUT stimulus
- Control signal generation
- Closed-loop measurement applications
Advantage: Integrated analog outputs allow the same PXI module to stimulate a device under test and acquire its response.
48 Digital I/O Lines
The PXI-6284 provides extensive digital I/O capability for automated test and control systems.
- 48 digital I/O lines
- Digital input and output
- Correlated digital I/O
- Hardware-timed digital operations
- Test fixture control
- Logic-state monitoring
Advantage: The large number of digital lines allows the PXI-6284 to control external hardware while performing analog measurements.
Correlated Digital I/O
The PXI-6284 supports correlated digital I/O for hardware-timed digital acquisition and generation.
- Hardware-timed digital input
- Hardware-timed digital output
- Digital waveform operations
- Analog and digital synchronization
- Mixed-signal automated testing
Advantage: Correlated digital I/O enables digital events to be synchronized with analog measurements and other hardware operations.
Two 32-Bit Counter/Timers
The PXI-6284 includes two general-purpose 32-bit counter/timers.
- 2 × 32-bit counter/timers
- Frequency measurement
- Period measurement
- Pulse-width measurement
- Event counting
- Pulse generation
- Encoder measurements
Advantage: Integrated counters provide additional timing functionality without requiring a separate counter/timer module.
Analog and Digital Triggering
The PXI-6284 provides hardware triggering resources for synchronized and event-driven measurements.
- Analog triggering
- Digital triggering
- Start triggers
- Reference triggers
- Hardware synchronization
- Event-based acquisition
PXI System Integration
The PXI-6284 is designed for modular PXI automated test and measurement systems.
- PXI platform integration
- PXI trigger resources
- Multi-instrument synchronization
- Modular system expansion
- Automated test integration
Advantage: The PXI-6284 can operate alongside PXI oscilloscopes, switches, digital instruments, communication interfaces, controllers, and other DAQ modules within a single test platform.
NI-DAQmx Software Support
The PXI-6284 is supported by NI-DAQmx for configuration, acquisition, signal generation, digital I/O, counters, timing, and triggering.
- NI-DAQmx driver
- LabVIEW integration
- NI MAX configuration
- TestStand integration
- C/C++ APIs
- .NET application development
Technical Specifications
| Parameter | Description |
|---|---|
| Product Type | High-Accuracy PXI Multifunction I/O Module |
| Model | NI PXI-6284 |
| Product Family | NI High-Accuracy M Series Multifunction DAQ |
| Bus Interface | PXI |
| Analog Inputs | 32 Single-Ended / 16 Differential |
| Analog Input Resolution | 18 Bit |
| Maximum Analog Input Sample Rate | 500 kS/s |
| Sampling Architecture | Multiplexed |
| Analog Outputs | 4 |
| Digital I/O | 48 Lines |
| Correlated Digital I/O | Supported |
| Counter/Timers | 2 |
| Counter Resolution | 32 Bit |
| Analog Triggering | Supported |
| Digital Triggering | Supported |
| Driver | NI-DAQmx |
| Primary Applications | Precision Data Acquisition, Automated Test, Research, Design Validation and Laboratory Measurement |
High-Accuracy Measurement Architecture
The primary reason to select the PXI-6284 is its combination of multifunction DAQ capability and high-resolution analog acquisition.
Many general-purpose multifunction DAQ modules use 16-bit analog-to-digital converters. The PXI-6284 increases analog input resolution to 18 bits, providing more quantization levels across the selected measurement range.
This additional resolution can be valuable when measuring small changes in voltage, characterizing electronic circuits, monitoring precision sensors, or performing automated tests where measurement repeatability and resolution are important.
18-Bit vs 16-Bit DAQ Resolution
| Resolution | Quantization Levels | Typical Positioning |
|---|---|---|
| 16 Bit | 65,536 | General-Purpose Data Acquisition |
| 18 Bit | 262,144 | High-Accuracy Data Acquisition |
An 18-bit ADC provides four times as many theoretical quantization levels as a 16-bit ADC. Actual measurement accuracy also depends on factors such as noise, gain error, offset error, temperature, calibration, signal conditioning, and the selected input range.
Analog Input Applications
The 32-channel analog input subsystem makes the PXI-6284 suitable for precision multi-channel measurements.
- Precision voltage measurements
- Sensor acquisition
- Electronic circuit characterization
- Automated data logging
- Product validation
- Laboratory research
Analog Output Applications
Four analog outputs allow engineers to generate programmable signals while simultaneously acquiring measurements.
- DUT stimulus generation
- Programmable control voltage
- Automated test sequences
- Closed-loop experiments
- Electronic validation
Digital I/O and Counter Applications
The PXI-6284 integrates digital control and timing functions alongside precision analog acquisition.
- Test fixture control
- Logic-state monitoring
- Relay control
- Frequency measurement
- Period measurement
- Pulse-width measurement
- Event counting
- Encoder measurements
Software Ecosystem
The NI PXI-6284 integrates with the NI-DAQmx software ecosystem for measurement, control, timing, triggering, and automated test development.
- NI-DAQmx: Provides hardware drivers and APIs for analog input, analog output, digital I/O, counters, timing, and triggering.
- LabVIEW: Enables graphical development of precision measurement, monitoring, control, and automated test applications.
- NI MAX: Provides hardware discovery, configuration, self-test, and device diagnostics.
- TestStand: Allows PXI-6284 measurement and control operations to be integrated into automated validation and manufacturing test sequences.
- C/C++ and .NET: Support customized DAQ applications through compatible NI-DAQmx APIs.
Industries
- Electronic Manufacturing
- Automated Test Equipment
- Research Laboratories
- Industrial Measurement
- Automotive Testing
- Product Development
- Design Verification
- Laboratory Automation
Applications
Precision Data Acquisition
The 18-bit analog input subsystem makes the PXI-6284 suitable for measurements where additional voltage resolution is required.
- Precision voltage acquisition
- Multi-channel measurement
- Sensor monitoring
- Automated data logging
- Long-term measurement systems
Electronic Device Characterization
The PXI-6284 can acquire high-resolution voltage measurements during electronic product development and characterization.
- Prototype characterization
- Electronic circuit testing
- Design verification
- Performance validation
- DUT response measurement
Automated Functional Testing
The combination of analog input, analog output, digital I/O, counters, and triggering supports multifunction automated test systems.
- PCB functional testing
- Electronic device testing
- Automated pass/fail testing
- Mixed-signal validation
- Production test systems
Laboratory Measurement
The PXI-6284 provides a flexible platform for research and laboratory experiments requiring precision analog acquisition and programmable control.
- Experiment automation
- Precision voltage measurement
- Sensor acquisition
- Signal generation
- Data logging
Design Verification and Validation
Engineers can use the PXI-6284 to acquire and generate signals during product development and validation.
- Prototype testing
- Hardware debugging
- Design verification
- Performance characterization
- Automated validation
PXI-6284 vs Standard 16-Bit Multifunction DAQ
| Feature | PXI-6284 | Typical 16-Bit Multifunction DAQ |
|---|---|---|
| Analog Input Resolution | 18 Bit | 16 Bit |
| Quantization Levels | 262,144 | 65,536 |
| Primary Focus | High Accuracy | General-Purpose DAQ |
| Analog Input Channels | 32 Single-Ended / 16 Differential | Varies |
| Maximum AI Sample Rate | 500 kS/s | Varies |
| Best Application | Precision Measurement | General Data Acquisition |
Comparison with Similar NI Multifunction I/O Modules
| Model | Main Difference | Best Application |
|---|---|---|
| NI PXI-6284 | 32 AI, 18-bit resolution and 500 kS/s acquisition with multifunction analog and digital I/O. | High-accuracy multifunction PXI data acquisition |
| NI PXI-6280 | Related high-accuracy M Series PXI DAQ for precision analog input applications. | High-accuracy analog data acquisition |
| NI PXI-6259 | 16-bit M Series multifunction DAQ with higher maximum analog input sampling performance. | General-purpose high-channel-count data acquisition |
| NI PXIe-6289 | PXI Express high-accuracy multifunction DAQ option for systems requiring newer PXIe architecture. | High-accuracy PXI Express measurement systems |
Recommended Related Products
| NI PXI-6280 | Related high-accuracy M Series module for precision analog data acquisition applications. |
| NI PXI-6259 | General-purpose 16-bit multifunction PXI DAQ for applications requiring higher acquisition speed and extensive mixed-signal I/O. |
| NI PXIe-6289 | PXI Express high-accuracy multifunction DAQ for precision measurement applications using a PXIe platform. |
Why Choose NI PXI-6284?
- High-accuracy M Series architecture
- 32 single-ended or 16 differential analog inputs
- 18-bit analog input resolution
- 262,144 theoretical ADC quantization levels
- Up to 500 kS/s analog input sampling
- 4 analog output channels
- 48 digital I/O lines
- Correlated digital I/O capability
- 2 × 32-bit counter/timers
- Analog and digital triggering
- NI-DAQmx software support
- PXI modular system integration
- Suitable for precision voltage measurements
- Ideal for automated characterization and validation
Frequently Asked Questions
What is the NI PXI-6284?
The NI PXI-6284 is a high-accuracy PXI multifunction data acquisition module designed for precision analog measurements, automated testing, laboratory research, design verification, and industrial data acquisition.
How many analog inputs does the PXI-6284 have?
The PXI-6284 provides up to 32 single-ended analog input channels or 16 differential analog input channels.
What is the analog input resolution of the PXI-6284?
The PXI-6284 provides 18-bit analog input resolution, making it suitable for higher-accuracy measurements than many standard 16-bit multifunction DAQ modules.
What is the maximum sampling rate of the PXI-6284?
The PXI-6284 provides a maximum analog input sampling rate of 500 kS/s.
Does the PXI-6284 use simultaneous sampling?
No. The PXI-6284 uses a multiplexed analog input architecture. If true simultaneous acquisition between analog channels is required, an NI simultaneous-sampling DAQ module should be considered instead.
How many analog outputs does the PXI-6284 provide?
The PXI-6284 provides four analog output channels for programmable voltage generation, DUT stimulus, control signals, and automated test applications.
How many digital I/O lines does the PXI-6284 have?
The PXI-6284 provides 48 digital I/O lines and supports correlated digital I/O for hardware-timed digital operations.
Does the PXI-6284 have counter/timers?
Yes. The PXI-6284 provides two 32-bit general-purpose counter/timers for frequency, period, pulse-width, event-counting, pulse-generation, and encoder applications.
What software supports the PXI-6284?
The PXI-6284 uses NI-DAQmx and can be integrated with compatible LabVIEW, NI MAX, TestStand, C/C++, and .NET measurement applications.
What is the difference between PXI-6284 and PXI-6259?
The PXI-6284 is designed primarily for high-accuracy measurements and provides 18-bit analog input resolution with up to 500 kS/s sampling. The PXI-6259 provides 16-bit resolution but offers higher analog input sampling performance. The PXI-6284 is therefore better suited for applications prioritizing measurement resolution and accuracy, while the PXI-6259 is more appropriate when higher acquisition speed is the priority.
What is the difference between PXI-6284 and PXI-6143?
The PXI-6284 is a high-accuracy multiplexed multifunction DAQ module with 32 single-ended or 16 differential analog inputs and 18-bit resolution. The PXI-6143 provides eight differential analog inputs with simultaneous sampling. Choose the PXI-6284 when high resolution and channel count are priorities, and the PXI-6143 when precise channel-to-channel timing is more important.
Is 18-bit DAQ always more accurate than 16-bit DAQ?
Not necessarily. ADC resolution determines the number of theoretical quantization levels, but total measurement accuracy also depends on gain error, offset error, noise, temperature drift, calibration, input range, signal source characteristics, and system configuration. The complete accuracy specification should therefore be considered when comparing DAQ devices.
What applications are suitable for the PXI-6284?
Typical applications include precision voltage acquisition, electronic device characterization, design verification, automated functional testing, sensor measurements, laboratory automation, data logging, and industrial measurement.
What should I check before purchasing a PXI-6284?
Before purchasing a PXI-6284, verify the exact model and part number, PXI chassis compatibility, analog input range requirements, connector and cabling requirements, required sampling rate, digital I/O requirements, and NI-DAQmx software compatibility.
Conclusion
The NI PXI-6284 High-Accuracy Multifunction I/O Module combines 32 single-ended or 16 differential analog inputs, 18-bit resolution, up to 500 kS/s analog acquisition, four analog outputs, 48 digital I/O lines, two 32-bit counter/timers, correlated digital I/O, and hardware triggering within a modular PXI platform. Its combination of high resolution and multifunction I/O makes the PXI-6284 particularly suitable for precision data acquisition, electronic characterization, automated test, laboratory measurement, and design validation applications.
