The GX5295 is a high performance, cost-effective 3U PXI dynamic digital I/O board with 32 I/O channels and features dynamic direction control with high performance pin electronics. The GX5295 offers 256M of on-board memory and supports test rates up to 100 MHz. The single board design supports both master and slave functionality without the use of add-on modules Each card can function as a stand-alone digital subsystem or if required, multiple cards can be interconnected, providing a single domain and supporting up to 512 bi-directional pins. Each digital pin can be individually programmed for a drive high / drive low voltage, input threshold high / low voltage, and a source / sink current load value (with commutation voltage level) – offering the user complete flexibility when creating test programs and fixtures for multiple UUTs. The drive and sense voltage levels can be programmed between -2 V and +7 volts with maximum span of 8 volts p-p. The GX5295 utilizes the PXI Local Bus to distribute signals across a domain. Triggering to/from other modules utilize the PXI backplane Trigger Bus to distribute signals across a domain (user defined).
Separate memories are provided for output data, response data (input) and direction control. Each has 256 MB with 64 Mb per channel. The separate response data memory supports the recording of activity on the UUT pins independent of the bi-direction control.. Additionally, the GX5295 can be configured to support real-time digital compare, eliminating the need to capture and analyze acquired data.
The GX5295 provides programmable output clocks and strobes, and external clock and strobe inputs as well a external event inputs. Four auxiliary pin electronic channels are available for use with clock inputs / outputs or external events. A programmable PLL (phase locked loop) provides configurable clock frequencies for module clocking as well as a range of programmable clock delays for the drive and strobe clock signal. The GX5295’s sequencer can halt or pause on a defined address or loop through the entire memory as well as loop on a defined address range or through a defined block of memory.
The GX5295 works as a complex programmable state machine with three main states: HALT, PAUSE and RUN. The central module of the board is the Vector Program Control. The Vector Program Control interprets predefined commands, controls the state machine and monitors the complex Trigger/Pause mechanism.
Each channel has its own Parametric Measurement Unit (PMU). The PMU offers the ability to perform analog measurements on each digital pin. Measurement configurations include force voltage, measure current and force current, measure voltage.
The figure below presents a block diagram of the GX5295’s digital architecture.
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Caution - The GX5295 is high performance instrument and must have sufficient cooling to ensure long term, reliable operation. Operating the unit in a PXI chassis with inadequate airflow or in an open chassis can cause overheating and damage to the module. |
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Caution - Do not connect a device under test (DUT) to the GX5295’s I/O connections prior to powering up the card. Transient voltages can be present on the card’s I/O connectors at power up which can damage the DUT. Always disconnect the DUT prior to powering up the card. |
Architecture Diagram
