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Data Converters 
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Digital-to-Analog Converters
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DS4422
Two-/Four-Channel, I²C, 7-Bit Sink/Source Current DAC
Low-Cost, Sink/Source Current DACs Simplify Power-Supply Margin Testing
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The DS4422 and DS4424 contain two or four I²C programmable current DACs that are each capable of sinking and sourcing current up to 200μA. Each DAC output has 127 sink and 127 source settings that are programmed using the I²C interface. The current DAC outputs power up in a high-impedance state.
Key Features
- Two (DS4422) or Four (DS4424) Current DACs
- Full-Scale Current 50µA to 200µA
- Full-Scale Range for Each DAC Determined by External Resistors
- 127 Settings Each for Sink and Source Modes
- I²C-Compatible Serial Interface
- Two Address Input Pins Allow Four Devices on Same I²C Bus
- Low Cost
- Small Package (14-Pin, 3mm x 3mm TDFN)
- -40°C to +85°C Temperature Range
- 2.7V to 5.5V Operating Range
Applications/Uses
- Adjustable Current Sink or Source
- Power-Supply Adjustment
- Power-Supply Margining
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