National Instruments 778705-01

The National Instruments part number 778705-01 refers to the PCI-6722 Analog Output Device, which features eight 13-bit analog output channels capable of delivering sample rates up to 800 kS/s. This device is versatile, functioning as both a master and a slave in timing and triggering configurations, thus accommodating multiple devices in a synchronized manner. It employs advanced integration technologies, including the RTSI bus and PFI pins, enabling seamless synchronization and triggering across various input and output types, such as image acquisition systems, analog inputs, high-speed digitizers, motion control systems, and multifunction data acquisition systems. This functionality allows for the construction of tailored, robust test and control systems.

Designed for real-time control applications, the NI 778705-01 is fully compatible with the LabVIEW Real-Time Module and supports common control algorithms, including PID, thereby enabling the implementation of sophisticated control strategies. The device includes essential features such as external clocking, digital triggering, an integrated synchronization bus, and dual 24-bit counters/timers. It serves as a cost-effective, high-efficiency arbitrary waveform generator, capable of producing various waveforms—including sine, square, and complex waveforms—up to 500 kHz. Equipped with a double-buffered, voltage-type digital-to-analog converter (DAC), the device features a FIFO buffer size of 2,047 samples, and it supports three DMA channels for data transfer management.

Data transfers can be conducted using various methods, including DMA, interrupts, or programmed I/O, with DMA operating in scatter-gather mode. The device offers a voltage output range of ±10 V with DC output coupling, an output impedance of 0.1 Ω, and a current drive capability of up to ±5 mA. Additionally, it features a channel-to-channel update glitch with a magnitude of 100 mV, lasting 1.2 µs, which occurs across all channels when a single channel is updated, affecting the output voltages of other channels.

The PCI-6722 is connected via a 68-pin VHDCI connector and requires a power supply of +3.3 VDC and +5 VDC, drawing 300 mA and 1.5 A respectively. The device is supported by the NI-DAQmx software driver and the Measurement & Automation Explorer configuration utility, providing a comprehensive solution for a wide range of automation and control applications.