The Keysight DAQM909A is a 4-channel simultaneous sampling digitizer module engineered for high-speed, synchronized data acquisition within the DAQ970A and DAQ973A mainframes. This module delivers 24-bit resolution across differential and single-ended inputs, supporting sampling rates up to 800 kSa/s in time domain and 100 kSa/s in frequency domain. With residual noise down to 7 μVrms and total harmonic distortion as low as -103 dB at 1 kHz, the DAQM909A is optimized for precision measurements in harmonic analysis, power characterization, and acoustic testing of electromechanical systems. Each channel can be independently configured with selectable input ranges from 300 mV to 36 Vpk differential, and includes an integrated IEPE current source (2 mA to 4 mA) for direct transducer excitation. Acquisition memory extends to 48 MSa per channel. Up to three modules installed in a single mainframe achieve 12 channels of fully synchronized simultaneous digitization.
Technical Specifications
• Channels: 4 per module
• Resolution: 24-bit
• Sampling Rate: 800 kSa/s (time domain); 100 kSa/s (frequency domain)
• Input Configuration: Differential (±18 Vpk for HI and LO pins) and single-ended configurable
• Input Range: 300 mV to 36 Vpk (selectable differential range up to 36 Vpk)
• Acquisition Memory: 16 MSa to 48 MSa per channel
• Residual Noise: 7 μVrms
• Total Harmonic Distortion: -103 dB at 1 kHz
• IEPE Current Source: 2 mA to 4 mA selectable
• Anti-alias Filters: Enabled in time and frequency domain sampling modes
• Triggering: Level/slope, external, alarm
• Weight: 0.64 kg
– Key Features
• Independent channel configuration for four input modes per channel
• Integrated anti-alias filtering for both time and frequency domain analysis
• Synchronized multi-module capability for expanded channel count
• IEPE excitation for direct piezoelectric transducer integration
– Typical Applications
• Harmonic and noise distortion analysis
• Power analysis and characterization
• Acoustic measurement of electromechanical devices
• Dynamic waveform capture with sub-microsecond timing correlation
– Compatibility & Integration
• Mainframe Support: DAQ970A, DAQ973A
• Modular Configuration: Up to 3 modules per mainframe (12 channels synchronized)
• Software: Benchvue DAQ for time/frequency domain analysis
