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National Instruments 779069-01 Multifunction I/O Device 

National Instruments part number 779069-01 is an identifying part number for the PCI-6250 Multifunction DAQ Device. This device features eight differential analog input channels, which can also be configured as 16 single-ended channels. It has a timing resolution of 50 ns and supports a maximum sampling rate of 1.25 MS/sec in single-channel mode. In multichannel mode, the rate drops to 1 MS/sec per channel. The input voltage range is +0.1 V to +10 V, with a maximum working voltage of +11 V. 

The device includes a 4095-sample input FIFO memory. Additionally, it has 24 digital input/output channels that can be individually configured as inputs or outputs. Designed for high-speed, accurate data reading, the part number 779069-01 uses NI-MCal calibration technology for enhanced measurement accuracy and an onboard NI-PGIA 2 amplifier to ensure high precision at maximum sampling rates. It supports the NI-DAQmx driver software and is compatible with NI LabVIEW for data logging. 

The 779069-01 Multifunction DAQ includes two general-purpose counters/timers with a resolution of 32 bits. It offers two types of clock sources: internal and external. The internal base clocks operate at fixed frequencies of 0.1 MHz, 20 MHz, and 80 MHz, while the external base clock has a frequency range from 0 to 20 MHz. M Series devices use a calibration method where some codes (about 5%) fall outside the specified range. This approach enhances absolute accuracy but increases the nominal resolution of input ranges by roughly 5%.