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NI 5772 CLIP

Last Modified: May 17, 2017

The NI 5772 ships with socketed CLIP items that are used to add module I/O to the LabVIEW project.

  • NI 5772 CLIPThis CLIP provides access to two analog input channels, eight bidirectional DIO channels, four bidirectional PFI channels, and an input clock selector that can be configured to use one of the following settings.
    • Internal Sample Clock
    • Internal Sample Clock locked to an external Reference Clock through the REF IN connector
    • External Sample Clock through the CLK IN connector
    • Internal Sample Clock locked to an external Reference Clock through IoModSyncClock

The CLIP also contains an engine to program the ADC and Sample Clock circuit, either through predetermined settings for an easier instrument setup, or through a raw SPI address and data signals for a more advanced setup. Access 12-bit analog input data using an I16 data type (left-justified). The DIO signals are grouped into two ports of four signals each and are accessed using a U8 data type and a Boolean write enable signal. The four PFI signals are accessed individually using Boolean indicators.

Although real-time sampling is the default sampling mode on the NI 5772, the NI 5772 CLIP also supports Time-Interleaved Sampling (TIS) on one analog input channel at a time. TIS enables the device to use both channels on the ADC to sample the same input channel at different relative phases, which doubles the real-time sampling rate. The NI 5772 then interleaves the samples to create a waveform as if only one ADC channel was sampling the waveform at twice the Sample Clock rate. The data is returned on the AI 0 Data <N..N-3> and AI 1 Data <N..N-3> signals even though the device is only sampling the single analog input channel that you selected.

The following figure demonstrates TIS on an NI 5772 device.

Figure 1. TIS Mode
spd-note-note
Note  

The ADC data sheet refers to TIS as Dual-Edge Sampling (DES).

  • NI 5772 Synchronized Reference Clock CLIPThis CLIP is the National Instruments NI 5772 Terminal Block, and it provides synchronization using an external 10 MHz reference. This CLIP also provides access to two analog input channels, eight bidirectional DIO channels, four bidirectional PFI channels, and an input clock selector that can be configured to use one of the following settings.
    • Internal Sample Clock
    • Internal Sample Clock locked to an external Reference Clock through the REF IN connector
    • Internal Sample Clock locked to an external Reference Clock though IoModSyncClock

    This CLIP also enables you to synchronize two or more modules using an external reference.

  • NI 5772 Synchronous External Clock CLIP—This CLIP provides access to the same features as the NI 5772 CLIP, described above, except it only allows sampling from an external Sample Clock, and it enables synchronization of two or more modules using an external Sample Clock.

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