LTC1426 - Micropower Dual 6-Bit PWM DAC

Features

  • Wide Supply Range: 2.7V </= VCC </= 5.5V
  • Wide Reference Voltage Range: 0V to 5.5V
  • Two Interface Modes:Pulse Mode (Increment Only)Pushbutton Mode (Increment/Decrement)
  • Low Supply Current: 50µA
  • 0.2µA Supply Current in Shutdown
  • Available in 8-Pin MSOP and SO Packages
  • DAC Contents Are Retained in Shutdown
  • DACs Power-Up at Midrange
  • Low Output Impedance: <100 ohms
  • Output Frequency: 5kHz Typ

Typical Application

LTC1426 Typical Application

Description

The LTC®1426 is a dual micropower 6-bit PWM DAC featuring versatile PWM outputs and a flexible pushbutton compatible digital interface. The DAC outputs provide a PWM signal that swings from 0V to VREF, allowing the full-scale output to be varied by adjusting the voltage at VREF. The PWM output frequency is typically 5kHz, easing output filtering requirements. VCC supply current is typically 50µA and drops to 0.2µA in shutdown. The LTC1426 can be controlled using one of two interface modes: pushbutton and pulse. The LTC1426 automatically configures itself into the appropriate mode at start-up by monitoring the state of the CLK pins. In pushbutton mode, the CLK pins can be directly connected to external pushbuttons to control the DAC output. In pulse mode, the CLK pins can be connected to CMOS compatible logic. The DAC outputs initially power up at half scale and the contents of the internal DAC registers are retained in shutdown. The LTC1426 is available in 8-pin MSOP and SO packages.

 

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
LTC1426CMS8#PBF MS-8 MS8 C 05-08-1660 Yes
LTC1426CMS8#TRPBF MS-8 MS8 C 05-08-1660 Yes
LTC1426CS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1426CS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1426IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1426IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes


LTC1426 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
LTC1426CMS8#PBF MS-8 C $4.35 $3.75 Yes
LTC1426CMS8#TRPBF MS-8 C $3.81 Yes
LTC1426CS8#PBF SO-8 C $4.15 $3.50 Yes
LTC1426CS8#TRPBF SO-8 C $3.56 Yes
LTC1426IS8#PBF SO-8 I $4.85 $4.05 Yes
LTC1426IS8#TRPBF SO-8 I $4.11 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 and 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