TI TIDA-0378PM2.5粒子传感器模拟前端参考设计.docxVIP

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TI TIDA-0378PM2.5粒子传感器模拟前端参考设计.docx

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TI TIDA-0378PM2.5粒子传感器模拟前端参考设计

TI TIDA－00378PM2．5粒子传感器模拟前端参考设计时间：2016-03-28 11:40:16?????? 作者：TI?????? 来源：中电网 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 (2.5μm)和PM10 (10μm)粒子检测和尘埃测量范围从340 x 103到991 x 103?pcs/ft3?(12 - 35 pcs/cm3),AFE输入电压3.3V,平均电流13mA,主要用在空气质量和气体检测以及环境传感器.本文介绍了OPA320主要特性,以及TIDA-00378主要特性和指标,传感器框图和电路图,材料清单和PCB设计图.The OPA320 (single) and OPA2320 (dual) are a new generation of precision, low-voltage CMOS operational amplifiers optimized for very low noise and wide bandwidth while operating on a low quiescent current of only 1.45mA.The OPA320 series is ideal for low-power, single-supply applications. Low-noise (7nV/√Hz) and high-speed operation also make them well-suited for driving sampling analog-to-digital converters (ADCs). Other applications include signal conditioning and sensor amplification.The OPA320 features a linear input stage with zero-crossover distortion that delivers excellent common-mode rejection ratio (CMRR) of typically 114dB over the full input range. The input common-mode range extends 100mV beyond the negative and positive supply rails. The output voltage typically swings within 10mV of the rails.In addition, the OPAx320 have a wide supply voltage range from 1.8V to 5.5V with excellent PSRR (106dB) over the entire supply range, making them suitable for precision, low-power applications that run directly from batteries without regulation.The OPA320 (single version) is available in a SOT23-5 package; the OPA320S shut-down single version is available in an SOT23-6 package. The dual OPA2320 is offered in SO-8, MSOP-8, and DFN-8 packages, and the OPA2320S (dual with shut-down) in an MSOP-10 package.OPA320主要特性:Precision with Zero-Crossover Distortion:Low Offset Voltage: 150μV (max)High CMRR: 114dBRail-to-Rail I/OLow Input Bias Current: 0.9pA (max)Low Noise: 7nV/√Hz at 10kHzWide Bandwidth: 20MHzSlew Rate: 10V/μsQuiescent Current: 1.45mA/chSingle-Supply Voltage Range: 1.8V to 5.5VOPA320S, OPA2320S:IQ?in Shutdow