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university:courses:electronics:electronics-lab-adc [30 Oct 2018 17:14] – Antoniu Miclausuniversity:courses:electronics:electronics-lab-adc [15 Jul 2019 15:41] – Circuit schematics have been replaced Pop Andreea
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 Consider the circuit presented in Figure 6. Consider the circuit presented in Figure 6.
  
-<WRAP centeralign> {{:university:courses:electronics:flash_adc-sch.png|}} </WRAP>+<WRAP centeralign> {{ :university:courses:electronics:flash_adc.png?400 |}} </WRAP>
  
 <WRAP centeralign> Figure 6. Flash ADC - analog side circuit </WRAP> <WRAP centeralign> Figure 6. Flash ADC - analog side circuit </WRAP>
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 For this particular application AD654 Voltage-to-Frequency converter is used as an analog-to-digital converter.  For this particular application AD654 Voltage-to-Frequency converter is used as an analog-to-digital converter. 
  
-<WRAP centeralign> {{:university:courses:electronics:vf_adc-sch.png|}} </WRAP>+<WRAP centeralign> {{ :university:courses:electronics:voltagetofrequencyconverteradc.png?400 |}} </WRAP>
  
 <WRAP centeralign> Figure 9. Voltage-to-Frequency Converter as ADC </WRAP> <WRAP centeralign> Figure 9. Voltage-to-Frequency Converter as ADC </WRAP>
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 In order to emphasize the operation principle of the SAR ADC with ADALM2000, we will use for the DAC part the circuit sudied in the [[university:courses:electronics:electronics-lab-14|Resistor Ladder Digital to Analog Converter]] lab, but for this setup we will use a 4-bit DAC (instead of 8-bit). The output of the DAC will be connected to a comparator, while the SAR will be simulated via a script that performs the binary search based on the comparator's output and generates the proper binary value. In order to emphasize the operation principle of the SAR ADC with ADALM2000, we will use for the DAC part the circuit sudied in the [[university:courses:electronics:electronics-lab-14|Resistor Ladder Digital to Analog Converter]] lab, but for this setup we will use a 4-bit DAC (instead of 8-bit). The output of the DAC will be connected to a comparator, while the SAR will be simulated via a script that performs the binary search based on the comparator's output and generates the proper binary value.
  
-<WRAP centeralign> {{:university:courses:electronics:sar_adc-sch.png|}} </WRAP>+<WRAP centeralign> {{ :university:courses:electronics:sar_adc.png?400 |}} </WRAP>
  
 <WRAP centeralign> Figure 14. SAR ADC schematic </WRAP> <WRAP centeralign> Figure 14. SAR ADC schematic </WRAP>
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 ==== Procedure ==== ==== Procedure ====
  
-Open Scopy. A Scopy initialization file is included to aid in setup, Dual_slope_scopy_setup.ini+Open Scopy. A Scopy initialization file is included to aid in setup,[[https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/blob/master/m2k/other_resources/dual_slope_adc/Dual_slope_scopy_setup.ini|Dual_slope_scopy_setup.ini]] 
  
 Power Supply: Tracking enabled, set to +/-5V Power Supply: Tracking enabled, set to +/-5V
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 Digitial IO: DIO2 set to OUT, set to 1 Digitial IO: DIO2 set to OUT, set to 1
  
-Pattern Generator: Group DIO0, DIO1, Pattern: Import (load file dual_slope_pattern.csv) Frequency set to 5Hz.+Pattern Generator: Group DIO0, DIO1, Pattern: Import (load file [[https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/blob/master/m2k/other_resources/dual_slope_adc/dual_slope_pattern.csv|dual_slope_pattern.csv]] ) Frequency set to 5Hz.
  
 Signal Generator: Channel 1 initally set to constant +2.5V Signal Generator: Channel 1 initally set to constant +2.5V
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 ===== Further Reading ===== ===== Further Reading =====
  
 +<WRAP round download>
 **Lab Resources:** **Lab Resources:**
   * Fritzing files: [[ https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/tree/master/m2k/fritzing/adc_lab_bb | adc_lab_bb]]   * Fritzing files: [[ https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/tree/master/m2k/fritzing/adc_lab_bb | adc_lab_bb]]
   * LTSpice files: [[ https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/tree/master/m2k/ltspice/adc_ltspice | adc_ltspice]]   * LTSpice files: [[ https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/tree/master/m2k/ltspice/adc_ltspice | adc_ltspice]]
   * JavaScript files: [[ https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/tree/master/m2k/javascript/sar_adc_script | sar_adc_script]]   * JavaScript files: [[ https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/tree/master/m2k/javascript/sar_adc_script | sar_adc_script]]
 +</WRAP>
  
 Some additional resources: Some additional resources:
university/courses/electronics/electronics-lab-adc.txt · Last modified: 03 Jan 2021 22:21 by Robin Getz

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