The NI PXI-6722 is an 8-channel analog output module for the PXI platform, purpose-built for high-speed multichannel signal generation in automated test and measurement systems. It delivers 13-bit resolution across a -10 V to 10 V range with 0.1 Ω output impedance and double-buffered architecture. The module supports static and software-timed voltage outputs with simultaneous multichannel updates, making it suitable for stimulus-response measurements, power supply control, deterministic closed-loop regulation, and sensor simulation. It functions as a replacement for stand-alone PID controllers, arbitrary waveform generators, and function generators.
Technical Specifications
Analog Output
• 8 voltage output channels
• 13-bit resolution (1 in 8,192)
• Output range: -10 V to 10 V, DC coupled
• Output impedance: 0.1 Ω
• Double-buffered voltage DAC
• Maximum update rate (local FIFO): 476 kS/s
• Maximum update rate (host memory): 182 kS/s (8 channels), 800 kS/s (1 channel), 714 kS/s (2 channels)
• FIFO buffer: 2,047 samples
• Slew rate: 10 kHz full-scale sine wave maximum
• Waveform generation: Square, sine, sawtooth, and complex waveforms up to 500 kHz
Digital I/O and Timing
• 8 digital I/O lines (5 V TTL/CMOS)
• 2 counter/timers (24-bit, 20 MHz)
Triggering and Synchronization
• Digital triggering and external clocking supported
• PXI trigger bus: Lines , star trigger and clock support
• RTSI bus compatibility: Trigger lines , RTSI clock
• Synchronization with DAQ, motion control, and vision products via RTSI, PXI trigger, and PFI pins
Data Transfer
• 3 DMA channels
• DMA, interrupt, and programmed I/O transfer methods
• Scatter-gather DMA supported
Power and Physical
• +3.3 VDC at 300 mA; +5 VDC at 1.5 A typical, 3 A maximum
• I/O connector power: +4.65 to +5.25 VDC at 1 A
• Dimensions: 16 cm × 10 cm
• Single 68-pin VHDCI I/O connector
• Operating temperature: 0 °C to 50 °C
• Storage temperature: -20 °C to 70 °C
• Humidity: 5% to 90% RH, noncondensing
• Maximum altitude: 2,000 meters
• Indoor use only, pollution degree 2
