PCI-5421 100 MS/s 16-Bit Arbitrary Waveform Generator
The NI PCI-5421 is a single-channel PCI arbitrary waveform generator that produces user-defined waveforms and standard sine, square, triangle and ramp functions.
It combines a 100 MS/s maximum update rate, 16-bit vertical resolution and 43 MHz maximum bandwidth. Direct digital synthesis provides precise standard-function generation, while arbitrary waveform mode and scripting support complex stimulus sequences.
Three part-number configurations provide 8 MB, 32 MB or 256 MB of onboard waveform memory. Selected versions also include an LVDS digital interface.
Key Features of the PCI-5421
- One arbitrary waveform output channel
- 100 MS/s maximum update rate
- 16-bit resolution
- 43 MHz maximum bandwidth
- Arbitrary waveform generation
- Sine, square, triangle and ramp functions
- Waveform sequencing and scripting
- 8 MB, 32 MB or 256 MB memory
- LVDS on selected configurations
- Conventional PCI interface
- NI-FGEN software support
PCI-5421 Technical Specifications
| Product Model | PCI-5421 |
|---|---|
| Product Type | Arbitrary waveform generator |
| Output Channels | 1 |
| Resolution | 16 bits |
| Maximum Update Rate | 100 MS/s |
| Maximum Bandwidth | 43 MHz |
| Output Voltage Range | Up to -12 V to +12 V, load and configuration dependent |
| Standard Functions | Sine, square, triangle and ramp |
| Arbitrary Waveforms | Supported |
| Waveform Scripting | Supported |
| Memory | 8 MB, 32 MB or 256 MB |
| Host Interface | Conventional PCI |
| Driver | NI-FGEN |
| Lifecycle Status | Limited Support |
PCI-5421 Part Number and Accessories
| Part Number | Memory | Description |
|---|---|---|
| 778692-01 | 8 MB | Standard PCI-5421 arbitrary waveform generator |
| 778692-02 | 32 MB | PCI-5421 with LVDS and extended waveform playback |
| 778692-03 | 256 MB | PCI-5421 with LVDS and maximum onboard memory |
| NI-Listed Replacement | — | 785116-01; verify specifications before migration |
Always provide the full part number when requesting a quote because the available memory and LVDS configuration differ between versions.
100 MS/s Arbitrary Waveform Generation
User-defined sample arrays can reproduce sensor signals, transient conditions, modulated envelopes and DUT-specific test patterns. The available waveform duration depends on sample rate and memory capacity.
16-Bit Vertical Resolution
Sixteen-bit resolution provides fine amplitude granularity. Practical accuracy and signal quality also depend on output range, offset, load impedance, frequency and calibration.
Direct Digital Synthesis
DDS supports precise sine, square, triangle and ramp generation without requiring a complete arbitrary waveform file for every standard signal.
Waveform Scripting
Scripting allows stored waveforms to be sequenced, looped and repeated in predetermined patterns. This reduces host-software timing dependence and supports deterministic stimulus generation.
Onboard Memory Options
The 8 MB version is suitable for shorter waveforms. The 32 MB and 256 MB versions support longer playback, with selected configurations providing LVDS connectivity.
PCI-5421 Applications
- Electronic functional testing
- Sensor simulation
- Automotive component validation
- Semiconductor stimulus generation
- Frequency-response testing
- Communications research
- Production test
- Laboratory education
Sensor Simulation
The arbitrary waveform engine can reproduce captured or calculated sensor outputs for repeatable controller testing.
Automated Stimulus Generation
NI-FGEN software can change amplitude, frequency, offset, trigger behavior and waveform selection during an automated test sequence.
Electronic Device Validation
The PCI-5421 can apply controlled periodic, transient or arbitrary signals while an oscilloscope, digitizer or DMM measures the DUT response.
PCI-5421 Installation Workflow
Step 1: Confirm the Part Number
Verify memory depth and whether LVDS functionality is required.
Step 2: Check the Computer Slot
The PCI-5421 requires a conventional PCI slot rather than PCI Express.
Step 3: Install NI-FGEN
Select a driver compatible with the operating system and programming environment.
Step 4: Install the Card
Power down the computer, observe ESD precautions and secure the device.
Step 5: Connect the Output
Use suitable cabling, impedance and grounding. Protect the output from externally applied energy.
Step 6: Run Self-Test
Verify detection and generate a low-amplitude sine wave before connecting the DUT.
Step 7: Verify Calibration
Use a calibrated oscilloscope or DMM to confirm amplitude, offset and frequency.
PCI-5421 Troubleshooting
The PCI-5421 is not detected
Check the conventional PCI slot, device seating and NI-FGEN compatibility.
No output waveform is detected
Verify output enable, trigger state, amplitude, offset, connector and cable.
The amplitude is incorrect
Check whether the software and connected load use high-impedance or 50 Ω amplitude assumptions.
Playback stops too early
Review waveform memory allocation, script instructions, regeneration and trigger settings.
The waveform is distorted
Check bandwidth, sample rate, output load, cable quality and frequency content.
Synchronization does not work
Verify the reference clock, trigger direction, LVDS configuration and script timing.
PCI-5421 Comparison
| Model | Platform | Rate | Resolution | Best Use |
|---|---|---|---|---|
| PCI-5421 | PCI | 100 MS/s | 16-bit | Maintaining PCI systems |
| PXI-5421 | PXI | 100 MS/s class | 16-bit | PXI test systems |
| PXI-5422 | PXI | Higher-performance family | 16-bit class | Advanced waveform generation |
| PXIe-5442 | PXI Express | Model dependent | Model dependent | Modern modular systems |
Selecting a PCI-5421 Replacement
Match the update rate, bandwidth, output voltage, memory capacity, LVDS requirement, trigger resources and host-bus interface. A recommended replacement should not automatically be assumed to be mechanically or software identical.
PCI-5421 Frequently Asked Questions
What is the PCI-5421?
It is a one-channel, 100 MS/s, 16-bit PCI arbitrary waveform generator.
What is its maximum bandwidth?
The maximum listed bandwidth is 43 MHz.
Which memory configurations are available?
8 MB, 32 MB and 256 MB versions are available.
Can it generate standard functions?
Yes. It supports sine, square, triangle and ramp waveforms.
Does it support waveform scripting?
Yes. Stored waveforms can be organized into scripted sequences.
Which driver controls the PCI-5421?
The device uses NI-FGEN.
Can it be installed in PCI Express?
No. It requires a conventional PCI slot.
Is it still fully supported?
NI lists the PCI-5421 as Limited Support. Verify driver, calibration and repair availability before purchase.
Recommended Related Products
- PXI-5421 Arbitrary Waveform Generator
- PXI-5422 Arbitrary Waveform Generator
- PXI-5402 Function Generator
- PXIe-5442 Arbitrary Waveform Generator
Request a Quote for the PCI-5421
Contact us with the required part number and memory capacity for current availability and pricing for the NI PCI-5421 100 MS/s Arbitrary Waveform Generator.
