Datasheet Texas Instruments LOG112AID — 数据表

LOG LOG112
LOG2112 2112 LOG
112 SBOS246D – JUNE 2002 – REVISED APRIL 2005 Precision
LOGARITHMIC AND LOG RATIO AMPLIFIERS
FEATURES DESCRIPTION в—Џ EASY-TO-USE COMPLETE FUNCTION 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. в—Џ OUTPUT SCALING AMPLIFIER
в—Џ ON-CHIP 2.5V VOLTAGE REFERENCE
в—Џ HIGH ACCURACY: 0.2% FSO Over 5 Decades
в—Џ WIDE INPUT DYNAMIC RANGE:
7.5 Decades, 100pA to 3.5mA The LOG112 and LOG2112 features a 2.5V voltage reference that may be used to generate a precision current
reference using an external resistor. в—Џ LOW QUIESCENT CURRENT: 1.75mA
в—Џ WIDE SUPPLY RANGE: В±4.5V to В±18V Low DC offset voltage and temperature drift allow accurate
measurement of low-level signals over the specified temperature range of –5°C to +75°C. ● PACKAGES: SO-14 (narrow) and SO-16 APPLICATIONS
в—Џ LOG, LOG RATIO:
Communication, Analytical, Medical, Industrial,
Test, General Instrumentation
в—Џ PHOTODIODE SIGNAL COMPRESSION AMP
в—Џ ANALOG SIGNAL COMPRESSION IN FRONT
OF ANALOG-TO-DIGITAL (A/D) CONVERTER …