ADALM2000的特性和性能

This chapter shows the features and performances as described in the Analog Discovery 2 Datasheet. Footnotes add detailed information and annotate the HW description in this Manual.

1. 示波器模拟输入

  • Channels: 2
  • Channel type: differential1)
  • Resolution: 14-bit
  • Absolute Resolution(scale ≤0.5V/div2)): 0.32mV
  • Absolute Resolution(scale≥1V/div3)): 3.58mV
  • Accuracy (scale≤0.5V/div, VinCM = 0V): ±10mV±0.5%
  • Accuracy (scale≥1V/div, VinCM = 0V): ±100mV±0.5%
  • CMMR (typical): ±0.5%
  • Sample rate (real time): 100MS/s
  • Input impedance: 1MΩ||24pF
  • Scope scales: 500uV to 5V/div4)
  • Analog bandwidth with Discovery BNC adapter5): 30 MHz+ @ 3dB, 10 MHz @ 0.5dB, 5 MHz @ 0.1dB
  • Analog bandwidth with Wire Kit6): 9 MHz @ 3dB, 2.9 MHz @ 0.5dB, 0.8 MHz @ 0.1dB
  • Input range: ±25V (±50V diff7))
  • Input protected to: ±50V;
  • Buffer size/channel: Up to 16k samples8)
  • Triggering: edge, pulse, transition, hysteresis, etc.9)
  • Cross-triggering with Logic Analyzer, Waveform Generator, Pattern Generator or external trigg10).
  • Sampling modes: average, decimate, min/max11)
  • Mixed signal visualization (analog and digital signals share same view pane)12)
  • Real-time views: FFTs, XY plots, Histograms and other13)
  • Multiple math channels with complex functions.
  • Cursors with advanced data measurements14)
  • Captured data files can be exported in standard formats15)
  • Scope configurations can be saved, exported and imported16)

2. 任意波形发生器模拟输出

  • Channels: 2
  • Channel type: single ended
  • Resolution: 14-bit
  • Absolute Resolution(amplitude ≤1V): 166μV
  • Absolute Resolution(amplitude >1V): 665μV
  • Accuracy - typical (|Vout| ≤ 1V): ±10mV ± 0.5%
  • Accuracy - typical (|Vout| > 1V): ±25mV ± 0.5%
  • Sample rate (real time): 100MS/s17)
    • AC amplitude (max): ±5 V18)
    • DC Offset (max): ±5 V19)
    • Analog bandwidth with Discovery BNC adapter20): 12 MHz @ 3dB, 4 MHz @ 0.5dB, 1 MHz @ 0.1dB
    • Analog bandwidth with Wire Kit21): 9 MHz @ 3dB, 2.9 MHz @ 0.5dB, 0.8 MHz @ 0.1dB
    • Slew rate (10V step): 400V/μs
    • Buffer size/channel: up to 16k samples22)
    • Standard waveforms: sine, triangle, sawtooth, etc.
    • Advanced waveforms: Sweeps, AM, FM23).
    • User-defined arbitrary waveforms: defined within WaveForms software user interface or using standard tools (e.g. Excel)24).


    ### 3. 逻辑分析仪

  • Channels: 16 (shared)25)
  • Sample rate (real time): 100MS/s
  • Buffer size/channel: up to 16K samples26)
  • Input logic: LVCMOS (1.8V/3.3V, 5V tolerant)
  • Multiple trigger options including pin change, bus pattern, etc27).
  • Cross-triggering between Analog input channels, Logic Analyzer, Pattern Generator or external trigger28).
  • Interpreter for SPI, I2C, UART, Parallel bus29).
  • Data file import/export using standard formats30).

4. 数字模式发生器

  • Channels: 16 (shared)31)
  • Sample rate (real time): 100MS/s
  • Algorithmic pattern generator (no buffers used)32)
  • Custom pattern buffer/ch.: up to 16Ksamples33)
  • Output logic standard: LVCMOS (3.3V, 12mA)
  • Data file import/export using standard formats34)
  • Customized visualization for signals and busses35).

5. 数字I/O

  • Channels: 16 (shared)36).
  • Input logic: LVCMOS (1.8V/3.3V, 5V tolerant)
  • Output logic standard: LVCMOS (3.3V, 12mA)
  • Virtual I/O devices (buttons, switches & displays)37).
  • Customized visualization options available38).

6. 供电

  • Voltage range: 0.5V…5V and -0.5V…-5V39).
  • Pmax (USB powered): 500mW total40)
  • Imax (USB powered): 700mA41) for each supply
    • Pmax (AUX powered): 2.1W42) for each supply
    • Imax (AUX powered): 700mA43) for each supply
    • Accuracy (no load): ±10mV
    • Output impedance: 50mΩ (typical)

7. 网络分析仪

  • Shared instruments: Scope, AWG
  • Frequency sweep range: 1Hz to 10MHz
  • Frequency steps: 5 … 100044).
  • Settable input amplitude and offset
  • Analog input records response at each frequency45).
  • Available diagrams: Bode, Nichols, or Nyquist46).

8. 电压表

  • Channels (shared with scope): 2
  • Channel type: differential
  • Measurements: DC, AC, True RMS47).
  • Resolution: 14-bit
  • Accuracy (scale ≤0.5V/div): ±5mV
  • Accuracy (scale ≥1V/div): ±50mV
  • Input impedance: 1MΩ || 24pF
  • Input range: ±25V (±50V diff)
  • Input protected to: ±50V

9. 频谱分析仪

  • Channels (shared with scope): 2
  • Power spectrum algorithms: FFT, CZT48).
  • Frequency range modes: center/span, start/stop49).
  • Frequency scales: linear, logarithmic50).
  • Vertical axis options: voltage-peak, voltage-RMS, dBV and dBu51).
  • Windowing: options: rectangular, triangular, hamming, Cosine, and many others52).
  • Cursors and automatic measurements: noise floor, SFDR, SNR, THD and many others53).
  • Data file import/export using standard formats54).

10. 其它特性

  • USB power option; all needed cables included.
  • External supply option: 5V, 2.5A (not included) 5.5/2.1mm connector, positive inner pin
  • High-speed USB2 interface for fast data transfer
  • Waveform Generator output played on stereo audio jack
  • Trigger in/trigger out allows multiple instruments to be linked55).
  • Cross triggering between instruments56).
  • Help screens, including contextual help57).
  • Instruments and workspaces can be individually configured; configurations can be exported58).
1) See note in section 2. Scope
2) High Gain: ±2.6V differential input voltage range.
3) Low Gain: ±29V differential input voltage range.
4) High Gain or Low Gain is used in the analog signal input path for rough scaling. “Digital Zooming” is used for multiple scope scales.
5) , 6) The Scope bandwidth depends on probes. The Analog Discovery wire kit is an affordable, easy-to-use solution, but it limits the frequency, noise, and crosstalk performances (see Figure 21, down). With coax probes and Analog Discovery BNC adapter, the 0.5dB Scope bandwidth is 10 MHz (see Fig. 15).
7) As shown in Fig. 12, a ±50V differential input signal does not fit in a single scope screen (ADC range). However, Vertical Position setting allows visualization of either +50V or -50V levels.
8) Default Scope buffer size is 8kSamples/channel. The WaveForms Device Manager provides alternate FPGA configuration files, with different resource allocation. With no memory allocated to the Digital I/O and reduced memory assigned to the AWG, the scope buffer size can be chosen to be 16kSamples/channel.
9) , 10) , 27) , 28) , 55) , 56) Trigger Detectors and Trigger Distribution Networks are implemented in the FPGA. This allows real time triggering and cross-triggering of different instruments within the Analog Discovery device. Using external Trigger inputs/outputs, cross-triggering between multiple Analog Discovery devices is possible.
11) Real time sampling modes are implemented in the FPGA. The ADC always works at 100MS/s. When a lower sampling rate is required, (108/N samples/sec), N ADC samples are used to build a single recorded sample, either by averaging or decimating. In the Min/Max mode, every 2N samples are used to calculate and store a pair of Min/Max values. The stored sample rate is reduced by half in Min/Max mode.
12) In mixed signal mode, the scope and Digital I/O acquisition blocks use the same reference clock, for synchronization.
13) , 14) , 29) This functionality is implemented by WaveForms software in the PC, using the buffered data from the FPGA. After a acquiring a complete data buffer at the FPGA level and uploading it to the PC, the data is processed and displayed, while a new acquisition is started.
15) , 16) , 24) , 30) , 34) , 35) , 37) , 38) , 44) , 45) , 46) , 47) , 48) , 49) , 50) , 51) , 52) , 53) , 54) , 57) , 58) This functionality is implemented by WaveForms software, in the PC.
17) The AWG DAC always works at 100MS/s. When a lower sampling rate is required, (108/N samples/sec), each sample is sent N times to the DAC.
18) , 19) The AWG output voltage is limited to ±5V. This refers to the sum of AC signal and DC offset.
20) , 21) The AWG bandwidth depends on probes. The Analog Discovery wire kit is an affordable, easy-to-use solution, but it limits the frequency, noise, and crosstalk performances. With coax probes and Analog Discovery BNC adapter, the 0.5dB AWG bandwidth is 4MHz (see Figure 21).
22) Default AWG buffer size is 4kSamples/channel. The WaveForms Device Manager provides alternate FPGA configuration files, with different resources allocation. With no memory allocated to the Digital I/O and reduced memory assigned to the Scope, the AWG buffer size can be 16kSamples/channel.
23) , 32) Real time implemented in the FPGA configuration.
25) , 31) , 36) All digital I/O pins are always available as inputs, to be acquired and displayed in the Logic Analyzer and Static I/O. The user selects which pins are also used as outputs, by the Pattern Generator or Static I/O. When a signal is driven by both Pattern Generator and Static I/O, the Static I/O has priority, except if Static I/O attempts to drive a HiZ value.
26) Default Logic Analyzer buffer size is 4kSamples/channel. The WaveForms Device Manager provides alternate FPGA configuration files, with different resource allocation. With no memory allocated to the Scope and AWG, the Logic Analyzer buffer size can be chosen to be 16kSamples/channel.
33) Default Pattern Generator buffer size is 1kSamples/channel. The WaveForms Device Manager provides alternate FPGA configuration files, with different resources allocation. With no memory allocated to the Scope and AWG, the Pattern Generator buffer size can be 16kSamples/channel.
39) WaveForms allows setting the user voltages in the range 0V…5V respectively -0V…-5V. However, voltages below 0.5V, respectively above -0.5V might have excessive ripple and should be used with caution.
40) This limit results from the overall device power balance: the power available from the USB port, minus the power internally used by the device, moderated by the user power supplies efficiency. The balance of 500mW is available for both user supplies to share.
41) , 42) , 43) This limit results from the structure of each user power supply (positive and negative). It is not conditioned by the load degree of the complementary user supply.