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LOG101,pdf(Precision Logarithm
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大小:422 |
2010-09-26
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The LOG101
is a versatile integrated circuit that computes
he logarithm or log ratio of an input current relative to a
eference current.
The LOG101 is tested over a wide dynamic range of input
signals. In log ratio applications, a signal current can come
rom a photodiode, and a reference current from a resistor in
series with a precision external reference.
The output signal at VOUT is trimmed to 1V per decade of input
current allowing seven decades of input current dynamic
ange.
Low DC offset voltage and temperature drift allow accurate
measurement of low-level signals over a wide environmental
emperature range. The LOG101 is specified over the tem-
perature range –5°C to +75°C, with operation over
–40°C to +85°C.
is a versatile integrated circuit that computes
he logarithm or log ratio of an input current relative to a
eference current.
The LOG101 is tested over a wide dynamic range of input
signals. In log ratio applications, a signal current can come
rom a photodiode, and a reference current from a resistor in
series with a precision external reference.
The output signal at VOUT is trimmed to 1V per decade of input
current allowing seven decades of input current dynamic
ange.
Low DC offset voltage and temperature drift allow accurate
measurement of low-level signals over a wide environmental
emperature 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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