NDIR Thermopile-Based Gas Sensing Circuit
Reference Design using part AD8629 by Analog Devices
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For End Products
- Temperature Monitoring
Description
- Complete thermopile-based gas sensor using the nondispersive infrared (NDIR) principle. This circuit is optimized for CO2 sensing, but can also accurately measure the concentration of a large number of gases by using thermopiles with different optical filters. The printed circuit board (PCB) is designed in an Arduino shield form factor and interfaces to the EVAL-ADICUP360 Arduino-compatible platform board. The signal conditioning is implemented with the AD8629 and the ADA4528-1 low noise amplifiers and the ADuCM360 precision analog microcontroller, which contains programmable gain amplifiers, dual 24-bit analog-to-digital converters (ADCs) and an ARM Cortex-M3 processor
Key Features
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Signal Conditioning TypeCalibration
Featured Parts (34)
| Part Number | Manufacturer | Type | Description | |||
|---|---|---|---|---|---|---|
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ADP7105ARDZ-3.3-R7 | Analog Devices | Linear Regulators | LDO Regulator Pos 3.3V 0.5A 8-Pin SOIC N EP T/R | Buy | |
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ADA4528-1ARMZ-R7 | Analog Devices | Operational Amplifiers - Op Amps | Op Amp Single Auto Zero/Chopper R-R I/O ±2.75V/5.5V 8-Pin MSOP T/R | Buy | |
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ADA4528-1ACPZ-RL | Analog Devices | Operational Amplifiers - Op Amps | Op Amp Single Auto Zero/Chopper R-R I/O ±2.75V/5.5V 8-Pin LFCSP T/R | Buy | |
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ADUCM360BCPZ128-R7 | Analog Devices | Microcontrollers - MCUs | MCU 32-bit ARM Cortex M3 RISC 128KB Flash 2.5V/3.3V 48-Pin LFCSP EP T/R | Buy | |
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ADP7105ACPZ-3.3-R7 | Analog Devices | Linear Regulators | LDO Regulator Pos 3.3V 0.5A 8-Pin LFCSP EP T/R | Buy | |
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ADP7105ARDZ-5.0-R7 | Analog Devices | Linear Regulators | LDO Regulator Pos 5V 0.5A 8-Pin SOIC N EP T/R | Buy | |
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ADP7105ACPZ-1.8-R7 | Analog Devices | Linear Regulators | LDO Regulator Pos 1.8V 0.5A 8-Pin LFCSP EP T/R | Buy | |
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ADA4528-1ARMZ-RL | Analog Devices | Operational Amplifiers - Op Amps | Op Amp Single Auto Zero/Chopper R-R I/O ±2.75V/5.5V 8-Pin MSOP T/R | Buy | |
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ADP7105ARDZ-3.3 | Analog Devices | Linear Regulators | LDO Regulator Pos 3.3V 0.5A 8-Pin SOIC N EP Tube | Buy | |
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ADP7105ACPZ-5.0-R7 | Analog Devices | Linear Regulators | LDO Regulator Pos 5V 0.5A 8-Pin LFCSP EP T/R | Buy | |
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ADA4528-1ACPZ-R2 | Analog Devices | Operational Amplifiers - Op Amps | Op Amp Single Auto Zero/Chopper R-R I/O ±2.75V/5.5V 8-Pin LFCSP T/R | Buy | |
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ADP7105ARDZ-5.0 | Analog Devices | Linear Regulators | LDO Regulator Pos 5V 0.5A 8-Pin SOIC N EP Tube | Buy | |