Features and Benefits

  • 80uA Supply Current
  • 4V to 36V Operation
  • 0.5°C Typical Initial Accuracy
  • Compatible with Standard Thermocouples
  • (E, J, K, R, S, T)
  • Auxiliary 10mV/°C Output
  • Bow Corrected

Product Details

The AC1226 is a micropower thermocouple cold junction compensator for use with type E, J, K, R, S, and T thermocouples. It utilizes wafer level and post-packaging trimming to achieve typical 0.5°C initial accuracy. Special curvature corrective circuitry is used to match the "bow" found in all thermocouples so that accurate cold junction compensation is maintained over a wider temperature range.

The AC1226 will operate with a supply voltage from 4V to 36V. Typical supply current is 80uA, resulting in less that 0.1°C internal temperature rise for supply voltages under 10V. A 10mV/°C output is available at low impedance in addition to the direct thermocouple voltages of 60.9uV/°C (E), 51.7uV/°C (J), 40.3uV/°C (K,T), and 5.95 uV/°C (R, S). All outputs are essentially independent of power supply voltage.

The AC1226 is available in an 8-pin plastic mini-DIP for temperatures between 0 and +70°C.

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information


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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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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