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LOG101 Datasheet

Part Number LOG101
Manufacturers Burr-Brown Corporation
Logo Burr-Brown Corporation
Description Precision LOGARITHMIC AND LOG RATIO AMPLIFIER
Datasheet LOG101 DatasheetLOG101 Datasheet (PDF)

LOG101 LOG 101 SBOS242B – MAY 2002 – REVISED JUNE 2004 Precision LOGARITHMIC AND LOG RATIO AMPLIFIER FEATURES q EASY-TO-USE COMPLETE CORE FUNCTION q HIGH ACCURACY: 0.01% FSO Over 5 Decades q WIDE INPUT DYNAMIC RANGE: 7.5 Decades, 100pA to 3.5mA q LOW QUIESCENT CURRENT: 1mA q WIDE SUPPLY RANGE: ±4.5V to ±18V DESCRIPTION The LOG101 is a versatile integrated circuit that computes the logarithm or log ratio of an input current relative to a reference current. The LOG101 is tested over a wide dyna.

  LOG101   LOG101






Part Number LOG101
Manufacturers ETCTI
Logo ETCTI
Description LOG101: Precision Logarithmic and Log Ratio Amplifier (Rev. B)
Datasheet LOG101 DatasheetLOG101 Datasheet (PDF)

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  LOG101   LOG101







Precision LOGARITHMIC AND LOG RATIO AMPLIFIER

LOG101 LOG 101 SBOS242B – MAY 2002 – REVISED JUNE 2004 Precision LOGARITHMIC AND LOG RATIO AMPLIFIER FEATURES q EASY-TO-USE COMPLETE CORE FUNCTION q HIGH ACCURACY: 0.01% FSO Over 5 Decades q WIDE INPUT DYNAMIC RANGE: 7.5 Decades, 100pA to 3.5mA q LOW QUIESCENT CURRENT: 1mA q WIDE SUPPLY RANGE: ±4.5V to ±18V DESCRIPTION The LOG101 is a versatile integrated circuit that computes the logarithm or log ratio of an input current relative to a reference current. The LOG101 is tested over a wide dynamic range of input signals. In log ratio applications, a signal current can come from 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 range. Low DC offset voltage and temperature drift allow accurate measurement of low-level signals over a wide environmental temperature range. The LOG101 is specified over the temperature range –5° C to +75 ° C, with operation over –40°C to +85°C. Note: Protected under US Patent #6,667,650; other patents pending. APPLICATIONS q LOG, LOG RATIO COMPUTATION: Communication, Analytical, Medical, Industrial, Test, and General Instrumentation q PHOTODIODE SIGNAL COMPRESSION AMPS q ANALOG SIGNAL COMPRESSION IN FRONT OF ANALOG-TO-DIGITAL (A/D) CONVERTERS I2 V+ 4 I1 1 VOUT = (1V) • LOG (I1/I2) CC 8 LOG101 Q1 Q2 A1 A2 R2 3 VOUT R1 5 GND V– 6 Please be aware that an important notice co.


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