Features and Benefits

  • Integrated Precision Reference
    • 2.5V Full-Scale 10ppm/°C (LTC2640-L)
    • 4.096V Full-Scale 10ppm/°C (LTC2640-H)
  • Maximum INL Error: 1LSB (LTC2640A-12)
  • Bidirectional Reference: Input or 10ppm/°C Output
  • Low Noise (0.7mVpp, 0.1Hz to 200kHz)
  • Guaranteed Monotonic Over Temperature
  • 2.7V to 5.5V Supply Range (LTC2640-L)
  • Low Power Operation: 180μA at 3V
  • Power Down to 1.8μA Maximum (C and I Grades)
  • Asynchronous DAC Clear Pin (LTC2640-Z)
  • Power-On Reset to Zero or Mid-Scale options
  • Double-Buffered Data Latches
  • Guaranteed Operation from –40°C to 125°C (H-Grade)
  • 8-Lead TSOT-23 (ThinSOT) Package

Product Details

The LTC2640 is a family of 12-, 10-, and 8-bit voltage-output DACs with an integrated, high-accuracy, low-drift reference in an 8-lead TSOT-23 package. It has a rail-to-rail output buffer that is guaranteed monotonic.

The LTC2640-L has a full-scale output of 2.5V, and operates from a single 2.7V to 5.5V supply. The LTC2640-H has a full-scale output of 4.096V, and operates from a 4.5V to 5.5V supply. A 10ppm/°C reference output is available at the REF pin.

Each DAC can also operate in External Reference mode, in which a voltage supplied to the REF pin sets the fullscale output.

The LTC2640 DACs use a SPI/MICROWIRE compatible 3-wire serial interface which operates at clock rates up to 50MHz.

The LTC2640 incorporates a power-on reset circuit. Options are available for Reset to Zero-Scale or Reset to Mid-Scale after power-up.


  • Mobile Communications
  • Process Control and Industrial Automation
  • Automatic Test Equipment
  • Portable Equipment
  • Automotive
  • Optical Networking

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.

Evaluation Kits (4)

Tools & Simulations


Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

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Product Recommendations

LTC2640 Companion Parts

Recommended µModule Isolator

Recommended Related Parts

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.

Sample & Buy

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.