The NI USB-6211 is a 16-bit multifunction DAQ device providing analog input/output, digital I/O, and counter functionality over USB connectivity. It delivers 16 single-ended or 8 differential analog input channels at 250 kS/s maximum sampling rate, 2 analog output channels, 4 digital input and 4 digital output lines, and two 32-bit counters. Fast settling times and high-speed signal streaming enable reliable multichannel measurements and control across portable logging, field monitoring, embedded systems, and laboratory environments.
Technical Specifications
Analog Input
• 16 single-ended or 8 differential channels
• 16-bit resolution with 250 kS/s maximum sampling rate (single channel)
• Input ranges: ±10 V, ±5 V, ±1.0 V, ±0.2 V
• Absolute accuracy (10 V range): 2,690 µV
• Gain error (10 V range): 132 ppm
• Offset error (10 V range): 130 ppm
• Noise uncertainty: 68.7 µV
• Small signal bandwidth (–3 dB): 450 kHz
• Settling time for multichannel: ±90 ppm (±6 LSB) at 4 μs, ±30 ppm (±2 LSB) at 5 μs, ±15 ppm (±1 LSB) at 7 μs
• Overvoltage protection: ±30 V (device on), ±20 V (device off) on up to two AI pins; ±20 mA maximum input current during overvoltage
• Input FIFO: 4,095 samples; Scan list memory: 4,095 entries
• No missing codes guaranteed (DNL); monotonicity per AI absolute accuracy
Analog Output
• 2 channels, 16-bit resolution
• 250 kS/s update rate (1 channel)
• Output range: ±10 V
• DAC monotonicity: 16-bit guaranteed
• DNL: ±1 LSB
Digital I/O
• 4 digital input channels (PFI /P0.)
• 4 digital output channels (PFI /P1.)
• Input voltage protection: ±20 V on up to 8 pins
• Pull-down resistor: 47 kΩ ±1%
• Ground reference: D GND
Counters
• Two 32-bit counter channels
– Key Features
• USB connectivity for portable deployment
• NI-DAQmx driver and configuration utility included
• Programmable function interface (PFI) for flexible signal routing
• Signal streaming technology for high-speed bidirectional USB data transfer
– Typical Applications
• Portable data logging and field monitoring
• Embedded OEM systems and in-vehicle data acquisition
• Educational laboratory measurements
• Test and control tasks requiring multichannel analog/digital sampling
