The DS2004 High-Speed A/D Board is used in dSPACE modular systems for digitizing analog input signals at high sample rates. The 16-bit A/D converters of the DS2004 are equipped with differential inputs. The board provides many different hardware- and software-based trigger mechanisms as well as data buffers for burst data transfer.
Each of the DS2004‘s 16 channels has an independent A/D converter with a resolution of 16 bits and differential inputs. The conversion time is 800 ns per channel. The measurement modes plus 4 external trigger inputs and extensive trigger functions enable the conversion of both single measurement values and whole sample bursts. The board buffers up to 16,384 values per channel and then transfers them to the processor board as a burst. This reduces the communication overhead and improves the overall system performance.
The DS2004‘s triggered sample mode can be used to record data within a defined window based on trigger events. For example, angle-synchronous measurements of a combustion engine can be started by an external software trigger. Possible applications include cylinder-pressure-based control and the measurement of knock signals in an angle window.
The DS2004‘s burst mode offers two ways of converting measurement values:
The Real-Time Interface (RTI) libraries for the A/D board provide RTI blocks that let you implement the functionality and I/O capabilities of the board in Simulink® models. You can add the RTI blocks to a Simulink model via drag & drop.
Parameter | Specification | |
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General |
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A/D channels1), 2) | Conversion time |
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Initial offset error |
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Initial gain error |
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Input offset drift |
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Gain drift |
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Linearity error |
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Differential linearity error |
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Missing codes | No missing codes at 15-bit | |
SNR (signal-to-noise ratio) |
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THD (total harmonic distortion) |
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Channel crosstalk |
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CMRR (common mode rejection ratio) |
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Input impedance |
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Input overvoltage protection |
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Interrupt controller |
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External trigger input | Input voltage |
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Input overvoltage protection |
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Host interface |
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Physical characteristics | Physical size |
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Ambient temperature |
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Power supply |
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1) Speed and timing specifications describe the capabilities of the hardware components and circuits of dSPACE products. Depending on the software complexity, the attainable overall performance can deviate significantly from the hardware specification.
2) Typical values at 25 °C, 16-bit resolution and ±10 V input voltage range (FSR = full-scale range).
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