The NI USB-6259 is a 16-bit multifunction data acquisition device that combines analog input, analog output, digital I/O, and counter/timer capabilities in a single USB 2.0 interface. It supports up to 32 single-ended or 16 differential analog input channels with sample rates to 1.25 MS/s per channel (1 MS/s aggregate), four analog output channels with update rates to 2.86 MS/s, and 48 TTL/CMOS digital I/O lines with hardware-timed operation up to 1 MHz. The device integrates two 32-bit counter/timers running at 80 MHz, analog and digital triggering, and NI-MCal technology for enhanced accuracy. Mass termination connectivity via connector part number 779695-01 enables efficient integration into measurement systems.
– Technical Specifications
Analog Input
• 32 single-ended or 16 differential channels
• 16-bit resolution
• Maximum sample rate: 1.25 MS/s (single channel), 1.00 MS/s (multi-channel aggregate)
• DC input coupling with ranges ±10 V, ±5 V, ±2 V, ±1 V, ±0.5 V, ±0.2 V, ±0.1 V
• Maximum working voltage: ±11 V relative to AI GND
• Input impedance: >10 GΩ parallel with 100 pF (device on); 820 Ω (device off)
• Input bias current: ±100 pA
• CMRR (DC to 60 Hz): 100 dB
• Small signal bandwidth (-3 dB): 1.7 MHz
• Adjacent channel crosstalk (100 kHz): -75 dB; non-adjacent: -90 dB to -95 dB
• Overvoltage protection: ±25 V (device on), ±15 V (device off) for up to four pins
• Input current during overvoltage: ±20 mA max per pin
• Input FIFO: 4,095 samples; Scan list memory: 4,095 entries
• Timing accuracy: 50 ppm of sample rate; timing resolution: 50 ns
Analog Output
• 4 channels, 16-bit resolution
• Maximum update rates: 2.86 MS/s (1 channel), 2.00 MS/s (2 channels), 1.54 MS/s (3 channels), 1.25 MS/s (4 channels)
• DC output coupling, 0.2 Ω output impedance
• Output current drive: ±5 mA
Digital I/O & Timing
• 48 TTL/CMOS digital I/O lines; up to 32 hardware-timed at 1 MHz
• Two 32-bit counter/timers at 80 MHz
• Analog and digital triggering support
– Key Features
• USB 2.0 connectivity (hi-speed and full-speed modes)
• NI-MCal technology for measurement accuracy
• Mass termination connector for rapid integration
• Wide input voltage ranges optimized for low-signal acquisition
• High input impedance minimizes loading effects
– Typical Applications
• Multi-channel sensor monitoring and industrial control
• Signal generation and waveform synthesis
• Precision timing and counting operations
• Mixed-signal test and measurement systems
– Compatibility & Integration
Windows 2000, XP, and Vista compatible. Mass termination connector (779695-01) standard.
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