187611K-03L

Description

The National Instruments PCI-4474 is a sophisticated data acquisition device designed for high-fidelity audio and vibration measurements. It supports 4 differential analog input channels with 24-bit Analog-to-Digital Converters (ADCs), ensuring precise data capture. This device is capable of reaching a maximum sampling rate of 102.4 kS/s, which allows for the accurate representation of a wide range of frequencies.

One of the standout features of the PCI-4474 is its dynamic range of over 110 dB when utilizing a 16 k FFT at a 51.2 kS/s sampling rate. This high dynamic range ensures that the device can handle a broad spectrum of signal amplitudes, making it versatile for various applications. The delta-sigma ADC type used in this product further enhances its performance in noise-sensitive applications.

The device offers software-selectable AC/DC coupling, providing flexibility in signal acquisition. Additionally, it includes a high pass filter with a cutoff frequency of 3.4 Hz, useful for eliminating low-frequency noise and DC offsets. Connection to the device is made simple through SMB front connectors, making setup and configuration straightforward.

To ensure accurate performance, the PCI-4474 features self-calibration on software command, with external calibration recommended annually or biennially depending on the use case. This ensures long-term reliability and accuracy of measurements. The device is driven by NI-DAQmx software, which provides a robust and intuitive interface for managing data acquisition tasks.

Despite its powerful features, the PCI-4474 maintains a compact form factor, with dimensions of 6.9 x 4.2 inches and weighing just 6.5 oz. It is designed to operate within a temperature range of 0 to 50 °C and can be stored in temperatures ranging from –20 to 70 °C. Its durability is further highlighted by its resistance to random vibrations, operating smoothly between 5 to 500 Hz at 0.3 grms and able to withstand non-operating random vibrations between Feature Specification Product Line National Instruments PCI-4474 Part Numbers 778729-01, 778778-01 Input Channels 4 differential analog Resolution 24-bit ADCs Maximum Sampling Rate 102.4 kS/s Dynamic Range > 110 dB (with 16 k FFT at 51.2 kS/s) ADC Type Delta-sigma AC/DC Coupling Software-selectable High Pass Filter Cutoff Frequency 3.4 Hz Connectors SMB front connectors Recommended Warm-up Time 15 minutes Calibration Self-calibration on software command; External calibration recommended annually or biennially Driver Software NI-DAQmx Weight 6.5 oz. Dimensions 6.9 x 4.2 in. Operating Temperature Range 0 to 50 °C Storage Temperature Range –20 to 70 °C Operating Random Vibration 5 to 500 Hz (0.3 grms) Non-operating Random Vibration 5 to 500 Hz (2.4 grms)

Question 1: What is the ADC bit size of the PCI-4474?
Answer 1: 24 bits