The NI USB-6225 is a 16-bit multifunction DAQ module engineered for USB connectivity in measurement and control applications spanning laboratory automation, research, design verification, and manufacturing test. It combines 40 differential (80 single-ended) analog input channels with 2 analog output channels, up to 24 digital I/O lines, and dual 32-bit counters/timers—all accessible through NI-DAQmx driver software. Signal conditioning expansion via SCC or SCXI modules enables sensor and high-voltage measurement capabilities.
Technical Specifications
-# Analog Inputs
• 40 differential or 80 single-ended channels, 16-bit resolution
• Input ranges: ±0.2 V, ±1 V, ±5 V, ±10 V
• Maximum sample rate: 250 kS/s (single or aggregate multichannel)
• Timing accuracy: 50 ppm of sample rate
• Input FIFO: 4,095 samples
• Overvoltage protection: All channels; ±20 mA maximum during overvoltage
• No missing codes guaranteed; maximum working voltage ±11 V
-# Analog Outputs
• 2 channels, 16-bit resolution with guaranteed monotonicity
• Output range: ±10 V; output impedance 0.2 Ω
• Maximum update rates: 833 kS/s (single), 740 kS/s (dual)
• Settling time: 4 µs convert interval (±90 ppm of step/±6 LSB on full-scale steps)
• Overdrive protection to ±25 V at 10 mA
-# Digital I/O
• Up to 24 static or 48 total channels
• Hardware-timed digital I/O: 32 lines at 1 MHz
• Correlated DIO: 8 clocked lines at 1 MHz
• Debounce filters: 125 ns, 6.425 µs, 2.56 ms, or disabled (selectable per input)
• Digital triggering supported
• ±20 V overvoltage protection on up to two pins
-# Counters/Timers
• Two 32-bit counters with 10 MHz and 100 kHz base clocks
• Base clock accuracy: 50 ppm
• Frequency generator output available on PFI or RTSI terminals
-# Power & Physical
• USB external supply: 11–30 VDC, 20 W
• +5 V terminal: 1 A max; combined +5 V/PFI/P0/P1/P2: 2 A max
• 2 A, 250 V supply fuse
• Recommended warm-up time: 15 minutes
– Key Features
• Guaranteed no missing codes (16-bit DNL)
• Timing accuracy maintained across all operating modes
• Integrated overvoltage and overdrive protection
• Selectable per-channel debounce configurations
• Direct signal conditioning module support
– Typical Applications
• Sensor characterization and calibration
• Real-time control systems in test environments
• Multi-channel data logging in production test
• Frequency and timing measurement tasks
– Compatibility & Integration
NI-DAQmx driver software enables simplified configuration. Expansion capabilities through SCC and SCXI signal conditioning modules extend measurement range and sensor compatibility. PFI terminals support correlated triggering and frequency generation.
