LTC1427-50 - Micropower, 10-Bit Current Output DAC with SMBus Serial Interface

Features

  • Precision 50µA, ±1.5% Initial Full-Scale Output Current, ±2.5% Over Temperature
  • Wide Output Voltage DC Compliance: –15V to (VCC – 1.3V)
  • Wide Supply Range: 2.7V </= VCC </= 5.5V
  • Supply Current in Shutdown: 10µA Typ
  • Low Supply Current: 115µA Typ
  • Available in 8-Pin SO
  • SMBus Serial Interface
  • Four Selectable SMBus Addresses
  • DAC Powers Up at Zero or Midscale
  • DAC Contents Are Retained in Shutdown

Typical Application

LTC1427-50 Typical Application

Description

The LTC®1427-50 is a micropower, 10-Bit current output DAC with an output range of 0µA to 50µA. The DAC output is guaranteed monotonic and DNL is less than 0.9LSB under all operating conditions. Full-scale accuracy is ±2.5% over the commercial temperature range. The LTC1427-50 operates with power supply voltages from 2.7V to 5.5V and the DAC current source output can be biased from (VCC – 1.3V) to –15V. The LTC1427-50 communicates with external circuitry by using the SMBus serial interface. It acts as an SMBus slave device using one of four selectable SMBus addresses set by the two address pins AD0 and AD1 . On power-up, the DAC output assumes midrange or zero scale, depending on the logic state of the two address pins. The LTC1427-50 can be shut down through the SHDN pin or by setting the SHDN bit = 1 in the SMBus command byte. Digital data for the DAC output is retained internally and the supply current drops to 10µA typically when in shutdown. The LTC1427-50 is available in an 8-pin SO package.

 

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
LTC1427CS8-50#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1427CS8-50#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes


LTC1427-50 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
LTC1427CS8-50#PBF SO-8 C $3.60 $3.00 Yes
LTC1427CS8-50#TRPBF SO-8 C $3.06 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

  • LCD Contrast and Backlight Brightness Control
  • Power Supply Voltage Adjustment
  • Battery Charger Voltage/Current Adjustment
  • GaAs FET Bias Adjustment
  • Trimmer Pot Elimination

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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
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support