LTC2757 - 18-Bit SoftSpan IOUT DAC with Parallel I/O


  • Maximum 18-Bit INL Error: ±1 LSB Over Temperature
  • Program or Pin-Strap Six Output Ranges:
    0V to 5V, 0V to 10V, –2.5V to 7.5V, ±2.5V, ±5V, ±10V
  • Guaranteed Monotonic Over Temperature
  • Low Glitch Impulse 1.4nV•s (3V), 3nV•s (5V)
  • 18-Bit Settling Time: 2.1μs
  • 2.7V to 5.5V Single Supply Operation
  • Reference Current Constant for All Codes
  • Voltage-Controlled Offset and Gain Trims
  • Parallel Interface with Readback of All Registers
  • Clear and Power-On-Reset to 0V Regardless of Output Range
  • 48-Pin 7mm × 7mm LQFP Package

Typical Application

LTC2757 Typical Application
LTC2757 Typical Application


The LTC2757 is an 18-bit multiplying parallel-input, current- output digital-to-analog converter that provides full 18- bit performance—INL and DNL of ±1LSB maximum—over temperature without any adjustments. 18-bit monotonicity is guaranteed in all performance grades. This SoftSpan DAC operates from a single 3V to 5V supply and offers six output ranges (up to ±10V) that can be programmed through the parallel interface or pin-strapped for operation in a single range.

In addition to its precision DC specifications, the LTC2757 also offers excellent AC specifications, including 2.1μs full-scale settling to 1LSB and 1.4nV•s glitch impulse.

The LTC2757 uses a bidirectional input/output parallel interface that allows readback of any on-chip register, including DAC output-range settings; and a CLR pin and power-on reset circuit that each reset the DAC output to 0V regardless of output range.


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
LTC2757ACLX#PBF 7mm x 7mm LQFP-48 LX C 05-08-1760 Yes
LTC2757AILX#PBF 7mm x 7mm LQFP-48 LX I 05-08-1760 Yes
LTC2757BCLX#PBF 7mm x 7mm LQFP-48 LX C 05-08-1760 Yes
LTC2757BILX#PBF 7mm x 7mm LQFP-48 LX I 05-08-1760 Yes

LTC2757 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
LTC2757ACLX#PBF 7mm x 7mm LQFP-48 C $49.94 $34.96 Yes
LTC2757AILX#PBF 7mm x 7mm LQFP-48 I $57.43 $40.20 Yes
LTC2757BCLX#PBF 7mm x 7mm LQFP-48 C $32.64 $22.85 Yes
LTC2757BILX#PBF 7mm x 7mm LQFP-48 I $37.54 $26.28 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.

Part Number Description Price Documentation
DC1485A LTC2757ACLX | 18-Bit Parallel Iout DAC with Softspan (1LSB INL), req DC590 $150.00
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Companion Boards

Part Number Description Price Documentation
DC590B Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards $50.00
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Click here to view our complete list of demo boards


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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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