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DS4426 - I2C-Margining IDACs

General 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.

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 t.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-4541; Rev 0; 4/09 www.DataSheet4U.com Quad-Channel, I2C-Margining IDACs with Three Channels of Power-Supply Tracking General 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.