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Partno	Mfg	Dc	Qty	Available	Descript
LOG2112AIDW	TI-BB	N/a	4	avai	Precision Logarithmic and Log Ratio Amplifier with On-Chip 2.5V Voltage Reference

LOG2112AIDW ,Precision Logarithmic and Log Ratio Amplifier with On-Chip 2.5V Voltage Referencefeatures a 2.5V voltage refer-7.5 Decades, 100pA to 3.5mAence that may be used to generate a precis ..
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LOG2112AIDW
Precision Logarithmic and Log Ratio Amplifier with On-Chip 2.5V Voltage Reference
LOG112
LOG2112
SBOS246D – JUNE 2002 – REVISED APRIL 2005
DESCRIPTION
The LOG112 and LOG2112 are versatile integrated circuits
that compute the logarithm or log ratio of an input current
relative to a reference current. VLOGOUT of the LOG112 and
LOG2112 are trimmed to 0.5V per decade of input current,
ensuring high precision over a wide dynamic range of input
signals.
The LOG112 and LOG2112 features a 2.5V voltage refer-
ence that may be used to generate a precision current
reference using an external resistor.
Low DC offset voltage and temperature drift allow accurate
measurement of low-level signals over the specified tem-
perature range of –5°C to +75°C.
FEATURES EASY-TO-USE COMPLETE FUNCTION OUTPUT SCALING AMPLIFIER ON-CHIP 2.5V VOLTAGE REFERENCE HIGH ACCURACY: 0.2% FSO Over 5 Decades WIDE INPUT DYNAMIC RANGE:
7.5 Decades, 100pA to 3.5mA LOW QUIESCENT CURRENT: 1.75mA WIDE SUPPLY RANGE: ±4.5V to ±18V PACKAGES: SO-14 (narrow) and SO-16
Precision
LOGARITHMIC AND LOG RA TIO AMPLIFIERS
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
APPLICATIONS LOG, LOG RATIO:
Communication, Analytical, Medical, Industrial,
Test, General Instrumentation PHOTODIODE SIGNAL COMPRESSION AMP ANALOG SIGNAL COMPRESSION IN FRONT
OF ANALOG-TO-DIGITAL (A/D) CONVERTER ABSORBANCE MEASUREMENT OPTICAL DENSITY MEASUREMENT