DS2004 High-Speed A/D Board1)

对模拟信号实现快速精确的数字化

DS2004 High-Speed A/D Board用于dSPACE模块化系统,以高采样率数字化模拟输入信号。DS2004的16位A/D转换器配备有差分输入。该板卡提供许多不同的硬件和软件触发机制以及用于突发数据传输的数据缓冲区。

The end of life for this product has been set. Please see the footnote for more detailed information.

主要优点

DS2004 的 16 个通道分别含有一个独立的 A/D 转换器,该转换器具有 16 位分辨率和多个差分输入端。每个通道的转换时间为 800 ns。两种测量模式以及 4 个外部触发输入端和广泛的触发功能确保了既能转换单个测量值,又能转换整个突发采样。该板每个通道能够缓存多达 16,384 个数值,随后以突发形式传输到处理器板。这减少了通信开销,提高了系统的整体性能。

应用领域

DS2004的触发样本模式可用于在定义的窗口(根据触发事件)内记录数据。例如,可以通过外部软件触发器启动内燃机的角度同步测量。可能的应用包括基于气缸压力的控制和在角度窗口内测量爆震信号。

两种触发模式

DS2004 触发模式具有两种转换测量值的方式。

  • 连续采样模式:当一次突发转换结束时,下一次突发会自动开始。一次突发内单个测量值的转换由软件、内部计时器或外部触发器进行触发。
  • 触发采样模式:一次突发转换可以由软件或触发事件启动。

使用Real-Time Interface

A/D板卡的Real-Time Interface(RTI)库提供RTI模块,允许您在Simulink®模型中实现板卡的功能和I/O功能。您可以通过拖放将RTI模块添加到Simulink模型中。

Parameter Specification
General
  • 16 A/D input channels (differential)
  • 16 independent A/D converters
  • 16-bit resolution
  • 0.8 µs ... 1 s trigger interval (adjustable)
  • ±5 V or ±10 V input voltage range (programmable for each channel)
  • ±12 V input voltage working range
  • 4 external trigger input lines
A/D channels1), 2) Conversion time
  • 800 ns
Initial offset error
  • ±1 mV
Initial gain error
  • ±0.1% of FSR
Input offset drift
  • ±2 ppm of FSR/K
Gain drift
  • ±20 ppm of FSR/K
Linearity error
  • ±0.003% of FSR
Differential linearity error
  • ±0.003% of FSR
Missing codes No missing codes at 15-bit
SNR (signal-to-noise ratio)
  • ≥+85 dB (at 10 kHz, 10 V range)
  • ≥+83 dB (at 10 kHz, 5 V range)
THD (total harmonic distortion)
  • ≤-85 dB (at 10 kHz, 10 V range)
  • ≤-83 dB (at 10 kHz, 5 V range)
Channel crosstalk
  • ≤-95 dB
CMRR (common mode rejection ratio)
  • ≥+85 dB (at 10 kHz signal frequency)
Input impedance
  • 1 MΩ
Input overvoltage protection
  • ±50 V continuous, ±60 V for up to 10 s
Interrupt controller
  • Burst start
  • Data ready
  • Data lost
  • Conversion trigger overflow
External trigger input Input voltage
  • CMOS level
Input overvoltage protection
  • ±50 V continuous, ±60 V for 10 s
Host interface
  • One 8- or 16-bit ISA slot (power supply only)
Physical characteristics Physical size
  • 340 x 125 x 15 mm (13.4 x 4.9 x 0.6 in)
Ambient temperature
  • 0 … 55 ºC (32 … 131 ºF)
Power supply
  • +5 V ±5%, max. 1.5 A
  • +12 V ±10%, 1.5 A

1) 速度和时间规格描述的是 dSPACE 产品的硬件组件和电路的性能。由于软件的复杂性不同,可获得的整体性能可能会大大偏离硬件规格,产生很大差别。
2) 25°C、16位分辨率和±10 V输入电压范围(FSR=满量程)的典型值。

1)The end of life of the dSPACE PHS (peripheral high-speed) hardware for modular systems is planned for December 31, 2024. You can still buy the related products up to and including December 31, 2021. New Releases of dSPACE software will still support the dSPACE PHS hardware for modular systems until at least the end of 2023. After the end of life, no services of any kind will be available for these products. We advise against using the PHS hardware products in new projects. For new projects we recommend that you use SCALEXIO, the latest dSPACE technology for modular real-time systems.

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