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LOG104 Status: ACTIVE

Logarithmic Amplifier


      
         
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 LOG104
Scale Factor(V/decade)0.5  
Input Current Range(Min)(nA)100  
Input Current Range(Max)(mA)3.5  
Conformity Error (initial 5 decades)(Max)(%)0.2  
Conformity Error (initial 5 decades) (typ. over temp)(%/degree C)0.0001  
Offset Voltage (Input Amplifiers)(Max)(mV)1.5  
Vs (+/-)(Min)(V)4.5  
Vs (+/-)(Max)(V)18  
Iq(Max)(mA)1.5  
Reference TypeExternal  
Full-Scale Output Voltage(Min)(+/- V)1.2  
Full-Scale Output Voltage(Max)(+/- V)1.5  
Operating Temp Range(Celsius)-40 to 85  
Pin/Package8SOIC  
RatingCatalog  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • LOG114: Precision High-Speed Logarithmic Amplifier with 2.5V Reference and Uncommitted Output Op Amps
  • LOG101: Logarithmic Amplifier
  • LOG2112: Precision Logarithmic and Log Ratio Amplifier with On-Chip 2.5V Voltage Reference
  • TL441: Logarithmic Amplifier
  • MPY634: Wide Bandwidth Precision Analog Multiplier

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Product Information

Features

  • EASY-TO-USE COMPLETE CORE FUNCTION
  • HIGH ACCURACY: 0.01% FSO Over 5 Decades
  • WIDE INPUT DYNAMIC RANGE:
       7.5 Decades, 100pA to 3.5mA
  • LOW QUIESCENT CURRENT: 1mA
  • WIDE SUPPLY RANGE: ±4.5V to ±18V
  • APPLICATIONS
    • LOG, LOG RATIO, ANTI-LOG COMPUTATION:
         Communication, Analytical, Medical, Industrial, Test, General Instrumentation
    • PHOTODIODE SIGNAL COMPRESSION AMP
    • ANALOG SIGNAL COMPRESSION IN FRONT OF ANALOG-TO-DIGITAL(A/D)CONVERTER

Note: Protected under US Patent #6,667,650; other patents pending.
All trademarks are the property of their respective owners.

Description

The LOG104 is a versatile integrated circuit that computes the logarithm or log ratio of an input current relative to a reference current.

The LOG104 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 0.5V 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 LOG104 is specified over the temperature range –5°C to +75°C, with operation over –40°C to +85°C.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
LOG104AIDACTIVE-40 to 857.65 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
LOG104AIDE4ACTIVE-40 to 857.65 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
LOG104AIDG4ACTIVE-40 to 857.65 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 11:54 AM GMT, 20 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksLOG104AID
AmericasAvnet 12
Newark 59
Rochester Electronics >1k
TI Lead Time*: 20 WeeksLOG104AIDE4
None Reported
View Distributors
TI Lead Time*: 20 WeeksLOG104AIDG4
None Reported
View Distributors
View all Distributors  

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
LOG104AID RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
LOG104AIDE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
LOG104AIDG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for LOG104 Help

Datasheet

Simulation Models

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
LOG114 Precision High-Speed Logarithmic Amplifier with 2.5V Reference and Uncommitted Output Op Amps SPECIAL FUNCTION AMPLIFIER-LOGARITHMIC AMPLIFIER TI customers also evaluated this product.
LOG101 Logarithmic Amplifier SPECIAL FUNCTION AMPLIFIER-LOGARITHMIC AMPLIFIER TI customers also evaluated this product.
LOG2112 Precision Logarithmic and Log Ratio Amplifier with On-Chip 2.5V Voltage Reference SPECIAL FUNCTION AMPLIFIER-LOGARITHMIC AMPLIFIER TI customers also evaluated this product.
LOG112 Precision Logarithmic and Log Ratio Amplifier with On-Chip 2.5V Voltage Reference SPECIAL FUNCTION AMPLIFIER-LOGARITHMIC AMPLIFIER TI customers also evaluated this product.
LOG102 Logarithmic and Log Ratio Amplifier SPECIAL FUNCTION AMPLIFIER-LOGARITHMIC AMPLIFIER TI customers also evaluated this product.
TL441 Logarithmic Amplifier AMPLIFIERS (SL)-LOGARITHMIC AMPLIFIERS (SL) TI customers also evaluated this product.
MPY634 Wide Bandwidth Precision Analog Multiplier SPECIAL FUNCTION AMPLIFIER-MULTIPLIER TI customers also evaluated this product.

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