LTC1257 - Complete Single Supply 12-Bit Voltage Output DAC in SO-8


  • 8-Pin SO Package
  • Buffered Voltage Output
  • Built-In 2.048V Reference
  • 500µV/LSB with 2.048V Full Scale
  • 1/2 LSB Max DNL Error
  • Guaranteed 12-Bit Monotonic
  • Three-Wire Cascadable Serial Interface
  • Wide Single Supply Range: VCC = 4.75V to 15.75V
  • Low Power: ICC Typ = 350µA with 5V Supply

Typical Application

LTC1257 Typical Application
LTC1257 Typical Application


The LTC1257 is a complete single supply, 12-bit voltage output D/A converter (DAC) in an SO-8 package. The LTC1257 includes an output buffer amplifier, 2.048V voltage reference and an easy to use three-wire cascadable serial interface. An external reference can be used to override the internal reference and extend the output voltage range to 12V. The power supply current is a low 350µA when operating from a 5V supply, making the LTC1257 ideal for battery-powered applications. The space-saving 8-pin SO package and operation with no external components provide the smallest 12-bit D/A system available.


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
LTC1257CN8#PBF N-8 N C 05-08-1510 (N8) Yes
LTC1257CS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1257CS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1257IN8#PBF N-8 N I 05-08-1510 (N8) Yes
LTC1257IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1257IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes

LTC1257 Package Drawing
LTC1257 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
LTC1257CN8#PBF N-8 C $5.60 $4.40 Yes
LTC1257CS8#PBF SO-8 C $5.90 $4.65 Yes
LTC1257CS8#TRPBF SO-8 C $4.71 Yes
LTC1257IN8#PBF N-8 I $6.15 $4.80 Yes
LTC1257IS8#PBF SO-8 I $6.50 $5.15 Yes
LTC1257IS8#TRPBF SO-8 I $5.21 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.

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
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  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
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