National Instruments 779065-01 Multifunction I/O Device

The part number 779065-01 from National Instruments is the identifying part number for the PCI-6220 Multifunction I/O Device. The 779065-01 Multifunction I/O Device offers 8 differential or 16 single-ended analog input channels, each with a 16-bit analog-to-digital converter (ADC). This resolution ensures precise measurements, with no missing codes guaranteed. The device supports a maximum single-channel sample rate of 250 kS/s and an aggregate sample rate of 250 kS/s for multichannel operations. The input range is programmable, providing options of ±0.2 V, ±1 V, ±5 V, and ±10 V, accommodating a wide variety of signal levels.

The input impedance for each channel, when the device is powered on, is greater than 10 GΩ in parallel with 100 pF, ensuring minimal loading on the signal source. The common-mode rejection ratio (CMRR) is 92 dB for DC to 60 Hz signals, enhancing measurement accuracy by rejecting common-mode noise. The  779065-01 Multifunction I/O Device features 24 digital I/O lines, including 8 lines on port 0 (P0.<0..7>), and 16 programmable function interface (PFI) lines, which are divided into two ports (P1 and P2). Each line is individually programmable for input or output, supporting static digital input and output, as well as timing input and output functions. The digital I/O lines are protected against voltages up to ±20 V on up to two pins.

The device includes two 24-bit general-purpose counters/timers with a resolution of 32 bits. These counters support various measurements such as edge counting, pulse width, semi-period, period, and two-edge separation. They also support position measurements using X1, X2, and X4 quadrature encoding with channel Z reloading. The internal base clocks are available at frequencies of 80 MHz, 20 MHz, and 0.1 MHz, with an accuracy of 50 ppm.

The 779065-01 Multifunction I/O Device operates efficiently within a standard PCI bus, drawing minimal power. It typically consumes 0.02 A from the +5 V rail, 0.25 A from the +3.3 V rail, and 0.15 A from the +12 V rail. The device is built to fit standard PCI slots, with dimensions of 10.6 cm × 15.5 cm (4.2 in. × 6.1 in.) and weighs approximately 91 grams (3.2 ounces).