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Precision photoelectric detection isolated amplifier ( ISO21

2015-01-06 22:30  
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Precision photoelectric detection isolated amplifier ( ISO212 ) circuit
The circuit adopts jfetinput integrated amp OPA128. This amp has very low offset current, which is about 40~150fA (1fA=10-15A),so its input impedance is extremely high (is about 1013//lΩ//pF), it andphotoelectric diode BPW21 form the photoelectric detection circuit with excellent performance. The photoelectric detection circuit will change light signals into electrical signals, andit issent to photoelectric coupling isolated amplifier ISO212P after amplifing,and that is the photoelectric detection isolated amplifier.