The National Instruments part number 779421-01 refers to the PCI-6133 Multifunction I/O Device. This versatile device is equipped with eight differential analog input channels, featuring a 14-bit analog-to-digital converter that facilitates high-precision signal conversion. With a resolution of 14 bits, the PCI-6133 can convert analog signals into digital format over 16,384 distinct voltage levels, ensuring accurate data capture for subsequent processing. The device boasts a maximum sampling rate of 2.5 mega samples per second per channel, enabling rapid data acquisition, while its input impedance of 100 MΩ minimizes signal noise and impact on the signal source, supported by a 10 pF capacitor on each channel to reduce loading effects.

Designed for robust performance, the PCI-6133 provides overvoltage protection of ±36 Volts and operates within an input voltage range of ±11 Volts for all analog channels. The device typically exhibits an input bias current of ±2 pA, with a maximum of ±25 pA, significantly reducing offset errors. The integrated 16 MS First In First Out buffer allows for continuous data acquisition without loss, coupled with support for various data transfer modes including DMA, interrupts, and programmed I/O. Additional specifications include an integral nonlinearity of ±0.6 LSB typical and ±1 LSB maximum, and a differential nonlinearity of ±0.25 LSB typical and ±0.75 LSB maximum, alongside a phase mismatch of ±2° at 1 MHz and system noise of 0.78 LSB rms at a ±10 Volt range. The total harmonic distortion is rated at -101.1 dB at 10 kHz within the same voltage range, ensuring high-fidelity signal integrity.

The PCI-6133 is also equipped with eight programmable digital I/O lines compliant with TTL/CMOS logic levels, facilitating flexibility in user configurations through compatible drivers and software. Furthermore, the device includes two 24-bit counters/timers and a 4-bit frequency scaler, capable of supporting up-and-down counting and precise timing operations. The PCI-6133 supports both analog and digital triggering, making it a comprehensive solution for a wide range of measurement and control applications.