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TI公司的TIDA-00378是PM2.5和PM10粒子传感器模拟前端(AFE)参考设计,基于OPA320单个和OPA2320双路运算放大器,PM2.5 (
Different methods exist to measure the amount of particle matter (PM) suspended in air. Optical-basedPM measurement instruments utilize the properties of absorption and light scattering to measure particlecount,>
The PM2.5/PM10 Particle Sensor Analog Front-End Design is capable of detecting particle matter with adiameter between 2.5 and 10 μm (PM10) and particle matter with a diameter less than 2.5 μm (PM2.5). ThisTI Design filters and amplifies the output from a photodiode and produces an output signal that can beprocessed by a microcontroller. The transimpedance stage uses an OPA2320 dual-package precisionCMOS operational amplifier (op amp) and an INA132 single-supply difference amplifier to convert theoutput current of the photodetector into a voltage. The filter and amplification stages use the OPA2320 opamp with a tunable gain and basic RC-filters. A light-emitting diode (LED) driver with an adjustable LEDcurrent is also included in the design.
The design is implemented on a single-ended, four-layer board of a>
This design guide addresses component selection, design theory, and test results of the entire TI Designsystem. The information provided in this design guide gives system designers a fully-tested referencedesign, which can be easily modified to meet different system requirements.
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图1.PM2.5粒子模拟前端解决方案TIDA-00378外形图
TIDA-00378主要特性:
Analog front-end design for PM2.5 (
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发表于 2016-3-28 13:42:49
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