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PXI多功能I/O模块提供多种不同的I/O，具有不同的通道数、采样率和输出速率，不同型号之间还具有的定时、触发和同步。该模块适用于实验室研究、设计验证测试和制造测试等工业应用。PXI多功能I/O模块还具有NI-DAQmx驱动程序和配置实用程序，可简化配置和测量。NI-DAQmx支持NI编程环境以及Python、ANSI C、C#.NET和MathWorks MATLAB®软件。

DEVICE SPECIFICATIONS

NI 6233

M Series Data Acquisition: 16-Bit, 250 kS/s, 16 AI, 2 AO, 24 DIO

Sinking, Voltage Input/Output Bank Isolation

The following specifications are typical at 25 °C, unless otherwise noted. For more

information about the NI 6233, refer to the NI 6232/6233 User Manual available from ni.com/

manuals.

Analog Input

Number of channels

8 differential or 16 single ended

Channel type

Voltage input

Ground reference

AI GND

ADC resolution

16 bits

DNL

No missing codes guaranteed

INL

Refer to the AI Absolute Accuracy section

Sample rate

Maximum

250 kS/s

Minimum

No minimum

Timing accuracy

50 ppm of sample rate

Timing resolution

50 ns

Input coupling

DC

Input range

±0.2 V, ±1 V, ±5 V, ±10 V

Maximum working voltage for analog

inputs

Refer to the Maximum Working Voltage section

CMRR (DC to 60 Hz)

95 dB (with respect to AI GND)

Input impedance

Device on

AI+ to AI GND

>10 GΩ in parallel with 100 pF

AI- to AI GND

>10 GΩ in parallel with 100 pF

Device off

AI+ to AI GND

820 Ω

AI- to AI GND

820 Ω

Input bias current

±100 pA

Crosstalk (at 100 kHz)

Adjacent channels

-75 dB

Non-adjacent channels

-90 dB

Small signal bandwidth (-3 dB)

700 kHz

Input FIFO size

4,095 samples

Scan list memory

4,095 entries

Data transfers

DMA (scatter-gather), interrupts,

programmed I/O

Overvoltage protection (AI <0..7> with respect to AI GND)

Device on

±25 V for up to two AI pins

Device off

±15 V for up to two AI pins

Input current during overvoltage condition

±20 mA maximum/AI pin

Settling Time for Multichannel Measurements

Accuracy, full-scale step, all ranges

±90 ppm of step (±6 LSB)

4 μs convert interval

±30 ppm of step (±2 LSB)

5 μs convert interval

±15 ppm of step (±1 LSB)

7 μs convert interval