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DS4426：Quad-Channel, I²C-Margining IDACs with Three Channels of Power-Supply Tracking

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

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.

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

DS4426: Typical Application Circuit Applications/Uses Adjustable Current Sink or Source Power-Supply Adjustment Power-Supply Margining Power-Supply Tracking

DataSheet

Parametrics

Quality and Environmental Data

• DS4426.pdf

Ordering Information