DS4426

Obsolete

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

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

Data Sheet (Rev. 1) Product Selection Table

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Overview

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

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.

Applications