The NI PCI-4454 is a 4-channel dynamic signal acquisition board engineered for high-fidelity audio, acoustic, and vibration measurements. It delivers simultaneous sampling across all channels with 16-bit resolution, 51.2 kS/s per-channel throughput, and delta-sigma conversion architecture for superior linearity and low distortion. The board integrates programmable gain amplification, software-selectable AC/DC coupling, and IEPE signal conditioning to accommodate piezoelectric transducers directly. A PCI bus interface enables high-speed data transfer and integration within larger National Instruments measurement systems.
Technical Specifications
Analog Input Channels: 4 single-ended inputs
Resolution: 16-bit ADCs
Sampling Rate: 51.2 kS/s per channel, simultaneous
Bandwidth: DC to 23 kHz
Input Range: ±10 V
Dynamic Range: 90 dB
Programmable Gain: −20 to +60 dB in 10 dB steps
Total Harmonic Distortion: −90 dB at 1 kHz; −80 dB worst-case at higher frequencies
Amplitude Flatness: ±0.1 dB (DC to 95 kHz)
Coupling: AC/DC switchable
Signal Conditioning: IEPE support
Analog Outputs (Optional): 24-bit simultaneous update at 51.2 kS/s
Digital I/O (Optional): 8 TTL-compatible lines
Counter/Timers: 2 × 24-bit channels for timing I/O
– Key Features
• Delta-sigma oversampled converters with integrated anti-aliasing and imaging filters
• External digital trigger (5 V TTL/CMOS, edge-selectable)
• Pretrigger, posttrigger, and delay trigger modes
• Trigger sources from analog inputs, external digital input, RTSI bus, or software
• RTSI bus synchronization for multi-instrument clock alignment
• Simultaneous sampling across all input channels
– Typical Applications
• Vibration and modal analysis
• Acoustic measurement and characterization
• High-fidelity audio signal acquisition
• Transient capture and waveform recording
– Compatibility & Integration
PCI bus interface with NI-DAQ driver support. Compatible with Windows, Linux, and macOS operating systems. Integrates with other National Instruments devices via RTSI synchronization bus.
