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Quad-Channel, I²C-Margining IDACs with Three Channels of Power-Supply Tracking

Inexpensive, I²C-Adjustable, Power-Supply Margining and Tracking

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Four Current DACs
    • 50µA to 200µA Adjustable Full-Scale Range
    • 127 Settings Each for Sink and Source
  • Power-Supply Tracking
    • Power-Supply Sequencing
    • Ramp-Up and Ramp-Down Tracking Control
    • Ratiometric Tracking Support
  • +2.7V to +5.5V Operation
  • I²C-Compatible Serial Interface
  • Two Address Input Pins Allow Up to Four Devices on Same I²C Bus
  • Lead-Free, 28-Pin TQFN Package (4mm x 4mm) with Exposed Pad
  • Industrial Temperature Range: -40°C to +85°C

Applications/Uses

  • Adjustable Current Sink or Source
  • Power-Supply Adjustment
  • Power-Supply Margining
  • Power-Supply Tracking

Description

The DS4426 contains four I²C-adjustable current DACs capable of sinking or sourcing current. External resistors set the full-scale range of each output. Each DAC output has 127 sink and 127 source steps that are programmed by the I²C interface. Power-supply tracking functionality is provided for three channels using dedicated control inputs. Once power-supply tracking is accomplished, the current outputs default to zero. Two address pins allow up to four DS4426 devices to exist on the same I²C bus.

Simplified Block Diagram

DS4426: Typical Application Circuit DS4426: Typical Application Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .