Maxim MAX40242 20V低输入电流低噪音双运放解决方案
maxim公司的max40242是20v低输入偏置电流低噪音双运算放大器,工作电压从2.7v到20v或双电源±1.35v到 ±10v,每路仅消耗静态度电流1.2ma,最大输入偏置电流2pa,输入噪音5nv/√hz,带宽10mhz,转换速率8v/μs,主要用在化学传感器接口,光电二极管传感器接口,医用血氧仪,工业过程与控制和精密仪器.本文介绍了max40242主要优势和特性,典型应用电路以及评估板max40242 evk主要特性,电路图,材料清单和pcb设计图.
the max40242 provides a combination of high voltage,low noise, low input bias current in a dual channel andfeatures rail-to-rail at the output.
this dual amplifier operates over a wide supply voltagerange from a single 2.7v to 20v supply or split ±1.35vto ±10v supplies and consumes only 1.2ma quiescentsupply current per channel.
the max40242 is a unity-gain stable amplifier with again-bandwidth product of 10mhz. the device outputsdrive up to 200pf load capacitor without any externalisolation resistor compensation.
the max40242 is available in 8-thin wafer-levelpackages (wlps) and is rated for operation over the-40℃ to +125℃ automotive temperature range.
max40242主要优势和特性:
●● 2.7v to 20v single supply or ±1.35v to ±10v dualsupplies
●● 2pa (max) input bias current
●● 5nv/√hz input voltage noise
●● 10mhz bandwidth
●● 8v/μs slew rate
●● rail-to-rail output
●● integrated emi filters
●● 1.2ma supply current per amplifier
●● tiny, 0.85mm x 1.65mm 8-wlp
max40242应用:
●● chemical sensor interface
●● photodiode sensor interface
●● medical pulse oximetry
●● industrial: process and control
●● precision instrumentation
图1.max40242典型应用电路
图2.max40242高阻抗源/传感器预放大应用电路
评估板max40242 evk
the max40242 evaluation kit (ev kit) provides a proven design to evaluate the max40242 low-input bias current, low-noise operational amplifier (op amp) in an 8-pin μmax® package. the ev kit circuit is preconfigured as noninverting amplifiers, but can be adapted to other topologies by changing a few components. the component pads accommodate 0805 packages, making them easy to solder and replace. the ev kit comes with a max40242ana+ installed.
评估板max40242 evk主要特性:
accommodates multiple op-amp configurations
rail-to-rail outputs
accommodates easy-to-use 0805 components
2.7v to 20v single supply or ±1.35v to ±10v dual supplies
proven pcb layout
fully assembled and tested
图3.评估板max40242 evk外形图
图4.评估板max40242 evk电路图
评估板max40242 evk材料清单:
图5.评估板max40242 evk pcb设计图:左:元件面;右:元件面布局图
图6.评估板max40242 evk pcb设计图:焊接面
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the max40242 provides a combination of high voltage,low noise, low input bias current in a dual channel andfeatures rail-to-rail at the output.
this dual amplifier operates over a wide supply voltagerange from a single 2.7v to 20v supply or split ±1.35vto ±10v supplies and consumes only 1.2ma quiescentsupply current per channel.
the max40242 is a unity-gain stable amplifier with again-bandwidth product of 10mhz. the device outputsdrive up to 200pf load capacitor without any externalisolation resistor compensation.
the max40242 is available in 8-thin wafer-levelpackages (wlps) and is rated for operation over the-40℃ to +125℃ automotive temperature range.
max40242主要优势和特性:
●● 2.7v to 20v single supply or ±1.35v to ±10v dualsupplies
●● 2pa (max) input bias current
●● 5nv/√hz input voltage noise
●● 10mhz bandwidth
●● 8v/μs slew rate
●● rail-to-rail output
●● integrated emi filters
●● 1.2ma supply current per amplifier
●● tiny, 0.85mm x 1.65mm 8-wlp
max40242应用:
●● chemical sensor interface
●● photodiode sensor interface
●● medical pulse oximetry
●● industrial: process and control
●● precision instrumentation
图1.max40242典型应用电路
图2.max40242高阻抗源/传感器预放大应用电路
评估板max40242 evk
the max40242 evaluation kit (ev kit) provides a proven design to evaluate the max40242 low-input bias current, low-noise operational amplifier (op amp) in an 8-pin μmax® package. the ev kit circuit is preconfigured as noninverting amplifiers, but can be adapted to other topologies by changing a few components. the component pads accommodate 0805 packages, making them easy to solder and replace. the ev kit comes with a max40242ana+ installed.
评估板max40242 evk主要特性:
accommodates multiple op-amp configurations
rail-to-rail outputs
accommodates easy-to-use 0805 components
2.7v to 20v single supply or ±1.35v to ±10v dual supplies
proven pcb layout
fully assembled and tested
图3.评估板max40242 evk外形图
图4.评估板max40242 evk电路图
评估板max40242 evk材料清单:
图5.评估板max40242 evk pcb设计图:左:元件面;右:元件面布局图
图6.评估板max40242 evk pcb设计图:焊接面
结合了多维度测量和冗余的Micronas双路输出霍尔传感器
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国产手机集体涨价：1999元，小米6还能脱颖而出吗？
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