Burr-Brown Corporation LOG101
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. The output signal at VOUT is trimmed to 1V per decade of input current allowing seven decades of input current dynamic range.| Part No. | LOG101 |
|---|---|
| Datasheet | LOG101 Download |
| Manufacturer |  Burr-Brown Corporation |
| Description | LOGARITHMIC AND LOG RATIO AMPLIFIER |
| Buy | Stock & Price |
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 ±18VDESCRIPTION
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. 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...
