The NI PCI-4472 is a 24-bit, 8-channel dynamic signal acquisition module designed for high-accuracy measurement in audio testing, vibration analysis, and machine condition monitoring. It delivers simultaneous sampling across all channels at up to 102.4 kS/s per channel with an alias-free bandwidth of 45 kHz and dynamic range exceeding 110 dB. Built-in IEPE signal conditioning supports direct connection of accelerometers and microphones, while automatically adjusting antialiasing filters preserve signal integrity across the measurement spectrum.
Technical Specifications
• Analog Inputs: 8 differential channels, 24-bit ADCs, simultaneous sampling
• Sample Rate: 102.4 kS/s per channel, software-programmable
• Alias-Free Bandwidth: 45 kHz
• Input Range: ±10 V
• Dynamic Range: >110 dB
• THD: Typically −100 dB or less at 1 kHz, −1 dBFS (50 kHz measurement bandwidth)
• Input Impedance: 1 MΩ, 25 pF typical
• AC/DC Coupling: High-pass filter cutoff at 3.4 Hz
• Timebase Accuracy: 50 ppm maximum, 25 ppm typical
• FIFO Buffer: 1,023 samples (analog input)
• Power Consumption: +5 V @ 4.0 A, +12 V @ 0.1 A, −12 V @ 0.1 A
– Key Features
• Integrated IEPE signal conditioning for accelerometers and microphones
• Antialiasing filters automatically adjust to sampling rate
• Pretrigger and posttrigger modes with multiple trigger sources
• External digital trigger input (5 V TTL/CMOS compatible, edge-selectable)
• Trigger sources: any analog input channel, external digital input, PXI trigger bus, RTSI bus, or software
• Multi-device synchronization via RTSI bus or PXI star trigger bus
• DMA support for efficient data transfer
– Typical Applications
• Audio and acoustics testing
• Vibration and modal analysis
• Machine condition monitoring and predictive maintenance
• Structural health monitoring
• Transient and impulse measurement
– Compatibility & Integration
• Interface: PCI bus (3.3 V or 5 V signal environment)
• Connectors: 9× SMB front-panel connectors
• Driver & Software: NI-DAQmx driver and configuration utility
• Programming Support: NI LabVIEW, Python, ANSI C, C#.NET, MATLAB
• Dimensions: 17.5 × 10.7 cm (6.9 × 4.2 in.)
• Weight: Approximately 200 g (7 oz)
