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Perform Accurate Optical Current Sense Measurements Using the LOG200 Logarithmic Amplifier
SBOA601
January 2025
LOG200
CONTENTS
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Perform Accurate Optical Current Sense Measurements Using the LOG200 Logarithmic Amplifier
1
Abstract
Trademarks
1
Introduction
2
Critical Photodiode Specifications
3
Interfacing the LOG200 With the Photosensor
3.1
Photodiode Connections
3.2
Photodiode Adaptive Biasing Current Output
4
Optical Bench for Current Sensing Measurements
4.1
Transient Response with Photosensor
5
Optical Power Measurements with the LOG200
6
Error Sources and Uncalibrated Error Analysis
7
Auxiliary Op Amp Circuits
7.1
Single-Ended to Differential Conversion Circuit
7.2
Sallen-Key Low-Pass Filter
8
Summary
9
References
IMPORTANT NOTICE
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Application Note
Perform Accurate Optical Current Sense Measurements Using the LOG200 Logarithmic Amplifier