LOG112数据手册TI中文资料规格书

描述 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 reference 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 temperature range of –5°C to +75°C.

特性 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
• 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