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LOG2112 Status: ACTIVE

Precision Logarithmic and Log Ratio Amplifier with On-Chip 2.5V Voltage Reference


      
         
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 LOG2112
Scale Factor(V/decade)0.5  
Input Current Range(Min)(nA)0.1  
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)3.5  
Reference TypeInternal  
Auxiliary Op Amps1  
Full-Scale Output Voltage(Min)(+/- V)-3.8  
Full-Scale Output Voltage(Max)(+/- V)3.5  
Operating Temp Range(Celsius)-40 to 85  
Pin/Package16SOIC  
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
  • LOG104: Logarithmic Amplifier
  • LOG112: Precision Logarithmic and Log Ratio Amplifier with On-Chip 2.5V Voltage Reference
  • TL441: Logarithmic Amplifier
  • THS3001: 420-MHz Current-Feedback Amplifier

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Product Information

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

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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.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
LOG2112AIDWACTIVE-40 to 8512.35 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
LOG2112AIDWE4ACTIVE-40 to 8512.35 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
LOG2112AIDWRACTIVE-40 to 8511.35 | 1kuSOIC (DW) | 16 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
LOG2112AIDWRE4ACTIVE-40 to 8511.35 | 1kuSOIC (DW) | 16 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples

* 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 11:46 AM GMT, 08 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 4 WeeksLOG2112AIDW
AmericasNewark 28
AsiaWPI 51
EuropeEBV Elektronik 16
WorldwideMouser Electronics 13
TI Lead Time*: 4 WeeksLOG2112AIDWE4
None Reported
View Distributors
TI Lead Time*: 1 WeekLOG2112AIDWR
None Reported
View Distributors
TI Lead Time*: 1 WeekLOG2112AIDWRE4
None Reported
View Distributors
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** 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
LOG2112AIDW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
LOG2112AIDWE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
LOG2112AIDWR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
LOG2112AIDWRE4 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 LOG2112 Help

Datasheet

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.
LOG104 Logarithmic Amplifier 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.
LOG101 Logarithmic Amplifier 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-EP Enhanced Product Logarithmic 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.
THS3001 420-MHz Current-Feedback Amplifier HIGH SPEED AMPLIFIER-CURRENT FEEDBACK TI customers also evaluated this product.

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