LT1112 - Dual Low Power Precision, Picoamp Input Op Amps

Features

  • Offset Voltage – Prime Grade: 60µV Max
  • Offset Voltage – Low Cost Grade
    (Including Surface Mount Dual/Quad): 75µV Max
  • Offset Voltage Drift: 0.5µV/°C Max
  • Input Bias Current: 250pA Max
  • 0.1Hz to 10Hz Noise: 0.3µVP-P, 2.2pAP-P
  • Supply Current per Amplifier: 400µA Max
  • CMRR: 120dB Min
  • Voltage Gain: 1 Million Min
  • Guaranteed Specs with ±1.0V Supplies
  • Guaranteed Matching Specifications
  • SO-8 Package – Standard Pinout
  • LT1114 in Narrow Surface Mount Package

Typical Application

LT1112 Typical Application
LT1112 Typical Application

Description

The LT1112 dual and LT1114 quad op amps achieve a new standard in combining low cost and outstanding precision specifications.

The performance of the selected prime grades matches or exceeds competitive devices. In the design of the LT1112/ LT1114 however, particular emphasis has been placed on optimizing performance in the low cost plastic and SO packages. For example, the 75µV maximum offset voltage in these low cost packages is the lowest on any dual or quad non-chopper op amp.

The LT1112/LT1114 also provide a full set of matching specifications, facilitating their use in such matching dependent applications as two and three op amp instrumentation amplifiers.

Another set of specifications is furnished at ±1V supplies. This, combined with the low 320µA supply current per amplifier, allows the LT1112/LT1114 to be powered by two nearly discharged AA cells.

Protected by U.S. Patents 4,575,685; 4,775,884 and 4,837,496

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LT1112ACN8#PBF N-8 N C 05-08-1510 (N8) Yes
LT1112CN8#PBF N-8 N C 05-08-1510 (N8) Yes
LT1112IN8#PBF N-8 N I 05-08-1510 (N8) Yes
LT1112IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1112IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1112MJ8 CERDIP-8 J M 05-08-1110 (J8) No
LT1112MPS8 SO-8 S8 MP 05-08-1610 (S8) No
LT1112MPS8#PBF SO-8 S8 MP 05-08-1610 (S8) Yes
LT1112MPS8#TR SO-8 S8 MP 05-08-1610 (S8) No
LT1112MPS8#TRPBF SO-8 S8 MP 05-08-1610 (S8) Yes
LT1112S8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1112S8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes


LT1112 Package Drawing
LT1112 Package Drawing
LT1112 Package Drawing
LT1112 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT1112ACN8#PBF N-8 C $4.17 $3.40 Yes
LT1112CN8#PBF N-8 C $2.92 $2.35 Yes
LT1112IN8#PBF N-8 I $3.10 $2.55 Yes
LT1112IS8#PBF SO-8 I $3.30 $2.75 Yes
LT1112IS8#TRPBF SO-8 I $2.81 Yes
LT1112MJ8 CERDIP-8 M $28.80 No
LT1112MPS8 SO-8 MP $12.01 $7.78 No
LT1112MPS8#PBF SO-8 MP $12.01 $7.78 Yes
LT1112MPS8#TR SO-8 MP $12.01 $7.78 No
LT1112MPS8#TRPBF SO-8 MP $12.01 $7.78 Yes
LT1112S8#PBF SO-8 C $3.25 $2.55 Yes
LT1112S8#TRPBF SO-8 C $2.61 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Picoampere/Microvolt Instrumentation
  • Two and Three Op Amp Instrumentation Amplifers
  • Thermocouple and Bridge Amplifiers
  • Low Frequency Active Filters
  • Photo Current Amplifiers
  • Battery-Powered Systems

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LT1112

Technical Support