Volatile Organic Compound Detector for Indoor Air Quality Measurement
使用 Analog Devices 的 ADN8810 的参考设计
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依据最终产品
- Air Monitor
说明
- Application circuit measures indoor air quality by using a metal-oxide sensor to detect gases composed of volatile organic compounds. The sensor is composed of a heating resistor and a sensing resistor. When the sense resistor is heated, its value changes as a function of the concentrations of different gases. The circuit uses a 12-bit, current output digital-to-analog converter (DAC) for precision control of the heater current, and the flexible software allows the heater to operate in one of the following four modes: constant current, constant voltage, constant resistance, and constant temperature. The circuit is able measure a wide range of sense resistance values by using a software-selectable, five range resistor divider. The board also includes a temperature and humidity sensor that is used for compensating the gas concentration value
Featured Parts (34)
| 零件编号 | 供应商 | 类别 | 说明 | |||
|---|---|---|---|---|---|---|
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AD7988-1BCPZ-RL | Analog Devices | Analog to Digital Converters - ADCs | 1-Channel Single ADC SAR 100ksps 16-bit Serial 10-Pin LFCSP EP T/R | 买入 | |
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ADP124ARHZ-2.5-R7 | Analog Devices | Linear Regulators | LDO Regulator Pos 2.5V 0.5A 8-Pin MSOP EP T/R | 买入 | |
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AD8628WAUJZ-RL | Analog Devices | Operational Amplifiers - Op Amps | Op Amp Single Auto Zero/Chopper R-R I/O ±2.5V/5V Automotive AEC-Q100 5-Pin TSOT T/R | 买入 | |
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AD8628WARTZ-R7 | Analog Devices | Operational Amplifiers - Op Amps | Op Amp Single Auto Zero/Chopper R-R I/O ±2.5V/5V Automotive AEC-Q100 5-Pin SOT-23 T/R | 买入 | |
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ADG884BCBZ-REEL7 | Analog Devices | Analog Switch Multiplexers | Analog Switch Dual SPDT 10-Pin WLCSP T/R | 买入 | |
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ADR4540BRZ | Analog Devices | Voltage References | V-Ref Precision 4.096V 10mA 8-Pin SOIC N Tube | 买入 | |
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AD8628AUJZ-REEL7 | Analog Devices | Operational Amplifiers - Op Amps | Op Amp Single Auto Zero/Chopper R-R I/O ±2.5V/5V 5-Pin TSOT T/R | 买入 | |
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AD8628WAUJZ-R7 | Analog Devices | Operational Amplifiers - Op Amps | Op Amp Single Auto Zero/Chopper R-R I/O ±2.5V/5V Automotive AEC-Q100 5-Pin TSOT T/R | 买入 | |
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ADP196ACBZ-01-R7 | Analog Devices | Current Limit Switches | Current Limit SW 1-IN 1-OUT 1.8V to 5.5V 3A 6-Pin WLCSP T/R | 买入 | |
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ADG758BCPZ-REEL7 | Analog Devices | Analog Switch Multiplexers | Analog Multiplexer Single 8:1 20-Pin LFCSP EP T/R | 买入 | |
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ADG884BRMZ-REEL7 | Analog Devices | Analog Switch Multiplexers | Analog Switch Dual SPDT 10-Pin MSOP T/R | 买入 | |
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ADR4540BRZ-R7 | Analog Devices | Voltage References | V-Ref Precision 4.096V 10mA 8-Pin SOIC N T/R | 买入 | |