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LOG101,pdf(Precision Logarithm

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  • 上传时间:2021-11-17
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  • 标      签: Amplifier

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The LOG101 is a versaTIle integrated circuit that computeshe logarithm or log raTIo of an input current relaTIve to aeference current.The LOG101 is tested over a wide dynamic range of inputsignals. In log raTIo applications, a signal current can comerom a photodiode, and a reference current from a resistor inseries with a precision external reference.The output signal at VOUT is trimmed to 1V per decade of inputcurrent allowing seven decades of input current dynamicange.Low DC offset voltage and temperature drift allow accuratemeasurement of low-level signals over a wide environmentalemperature range. The LOG101 is specified over the tem-perature range –5°C to +75°C, with operation over–40°C to +85°C.
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