The NI PCIe-6351 X Series Multifunction Data Acquisition Card delivers high-performance analog input, analog output, digital I/O, and counter/timer functionality for demanding measurement and control applications. Built on PCI Express architecture, this card provides high throughput and low latency through onboard NI-STC3 technology featuring independent analog and digital timing engines. The device supports retriggerable measurement tasks and flexible timing resolution of 10 ns with 50 ppm accuracy.
Technical Specifications
Analog Input
• 8 differential or 16 single-ended channels
• 16-bit resolution with no missing codes guaranteed
• Maximum sample rate: 1.25 MS/s single channel; 1.00 MS/s multichannel aggregate
• Input ranges: ±0.1 V, ±0.2 V, ±0.5 V, ±1 V, ±2 V, ±5 V, ±10 V
• Maximum working voltage: ±11 V from AI GND
• CMRR (DC to 60 Hz): 100 dB
• Input impedance (device on): >10 GΩ in parallel with 100 pF
• Input bias current: ±100 pA
• Small signal bandwidth (-3 dB): 1.7 MHz
• Input FIFO: 4,095 samples; scan list memory: 4,095 entries
• Crosstalk at 100 kHz: adjacent channels -75 dB, non-adjacent -95 dB
Analog Output
• 2 channels, 16-bit resolution
• Output range: ±10 V
• Maximum update rate: 2.86 MS/s
Digital I/O
• 24 lines at maximum rate of 10 MHz
Counters/Timers
• 4 counters, 32-bit resolution
• Base clocks: 20 MHz, 10 MHz, 100 kHz
• Timebase rate: 100 MHz
• Functions: PWM, encoder, frequency measurement, event counting
• 1 frequency generator channel
– Key Features
• Four 32-bit counter/timers for flexible timing and synchronization
• PCI Express connectivity for low-latency data transfer
• DC-coupled analog input with multiple voltage ranges
• High input impedance and excellent common-mode rejection
• Referenced single-ended, non-referenced single-ended, and differential input configurations
– Typical Applications
• Pulse width modulation (PWM) control
• Encoder counting and frequency measurement
• Event counting and timing
• Data logging and test automation
• Complex measurement and control systems
– Compatibility & Integration
The PCIe-6351 integrates with the NI-DAQmx driver and supports development environments including LabVIEW for streamlined configuration and measurement workflows.
