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| resources:eval:user-guides:eval-adicup360:hardware:cn0396 [28 Oct 2016 16:01] – [Equipment Needed] Brandon Bushey | resources:eval:user-guides:eval-adicup360:hardware:cn0396 [29 Jul 2021 05:22] (current) – [Registration] Zuedmar Arceo |
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| [[ADI>CN0396]] is single-supply, low noise, portable gas detector, using a 4-electrode electrochemical sensor, for simultaneous detection of two distinct gases. The Alphasense COH-A2 sensor, which detects carbon monoxide(CO) and hydrogen sulfide(H2S), is used in this example. Electrochemical sensors offer several advantages for instruments that detect or measure the concentration of many toxic gases. Most sensors are gas specific and have usable resolutions under one part per million (ppm) of gas concentration. | [[ADI>CN0396]] is single-supply, low noise, portable gas detector, using a 4-electrode electrochemical sensor, for simultaneous detection of two distinct gases. The Alphasense COH-A2 sensor, which detects carbon monoxide(CO) and hydrogen sulfide(H2S), is used in this example. Electrochemical sensors offer several advantages for instruments that detect or measure the concentration of many toxic gases. Most sensors are gas specific and have usable resolutions under one part per million (ppm) of gas concentration. |
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| The circuit shown in below uses the [[http://www.analog.com/ADA4528-2|ADA4528-2]], dual auto zero amplifier, which has a maximum offset voltage of 2.5 µV at room temperature and an industry leading 5.6 µV/√Hz of voltage noise density. In addition, the [[http://www.analog.com/AD5270|AD5270-20]] programmable rheostat is used rather than a fixed transimpedance resistor, allowing for rapid prototyping of different gas sensor systems, without changing the bill of materials. | The circuit shown in below uses the [[adi>ADA4528-2|ADA4528-2]], dual auto zero amplifier, which has a maximum offset voltage of 2.5 µV at room temperature and an industry leading 5.6 µV/√Hz of voltage noise density. In addition, the [[adi>AD5270|AD5270-20]] programmable rheostat is used rather than a fixed transimpedance resistor, allowing for rapid prototyping of different gas sensor systems, without changing the bill of materials. |
| The [[http://www.analog.com/ADR3412|ADR3412]] precision, low noise, micropower reference establishes the 1.2 V common-mode, pseudo ground reference voltage with 0.1% accuracy and 8 ppm/°C drift. | The [[adi>ADR3412|ADR3412]] precision, low noise, micropower reference establishes the 1.2 V common-mode, pseudo ground reference voltage with 0.1% accuracy and 8 ppm/°C drift. |
| For applications where measuring fractions of ppm gas concentration is important, using the [[http://www.analog.com/ADA4528-2|ADA4528-2]] and the [[http://www.analog.com/ADR3412|ADR3412]] makes the circuit performance suitable for interfacing with a 16-bit ADC, such as the [[http://www.analog.com/AD7790|AD7790]]. | For applications where measuring fractions of ppm gas concentration is important, using the [[adi>ADA4528-2|ADA4528-2]] and the [[adi>ADR3412|ADR3412]] makes the circuit performance suitable for interfacing with a 16-bit ADC, such as the [[adi>AD7790|AD7790]]. |
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| An ADT7310 16-Bit Digital SPI Temperature Sensor is also included in the circuit to allow for monitoring of environmental temp. This allows for correction of the temperature effects on the sensor. | An ADT7310 16-Bit Digital SPI Temperature Sensor is also included in the circuit to allow for monitoring of environmental temp. This allows for correction of the temperature effects on the sensor. |
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| Pin Compatible Sensors: | Pin Compatible Sensors: |
| * [[http://www.alphasense.com/WEB1213/wp-content/uploads/2016/06/COH-A2.pdf|Alphasense COH-A2]] | * [[https://www.alphasense.com/WEB1213/wp-content/uploads/2019/09/CO-H2S.pdf|Alphasense COH-A2]] |
| * [[http://www.alphasense.com/WEB1213/wp-content/uploads/2016/06/SO2-H2S.pdf|Alphasense SOH-A2]] | * [[https://www.alphasense.com/WEB1213/wp-content/uploads/2017/03/SO2-H2S.pdf|Alphasense SOH-A2]] |
| * DD-Scientific GS+4DT | * DD-Scientific GS+4DT |
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| <WRAP round 80% download> | <WRAP round 80% download> |
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| [[http://www.analog.com/cn0396-designsupport|EVAL-CN0396-ARDZ Design & Integration Files]] | [[adi>cn0396-designsupport|EVAL-CN0396-ARDZ Design & Integration Files]] |
| * Schematics | * Schematics |
| * PCB Layout | * PCB Layout |
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| ====== Software ====== | ====== Software ====== |
| * [[resources:eval:user-guides:eval-adicup360:reference_designs:demo_cn0396|CN0396 ADICUP360 Demo Documentation]] | * [[resources:eval:user-guides:eval-adicup360:reference_designs:demo_cn0396|ADICUP360 + CN0396 Demo]] |
| * [[https://github.com/analogdevicesinc/EVAL-ADICUP360/tree/master/projects/ADuCM360_demo_cn0396|ADuCM360 Example Software]] | * [[resources:eval:user-guides:arduino-uno:reference_designs:demo_cn0396|Arduino Uno + CN0396 Demo]] |
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| | =====Registration===== |
| | <WRAP round tip 80% > |
| | Receive software update notifications, documentation updates, view the latest videos, and more when you register your hardware. [[reg>EVAL-CN0396-ARDZ?&v=RevB|Register]] to receive all these great benefits and more! |
| | </WRAP> |
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| {{navigation EVAL-ADICUP360#base_board|EVAL-ADICUP360 Base Board#.:|Hardware#none}} | //End of Document// |
