DS4426

The DS4426 contains four I2C-adjustable current DACs capable of sinking or sourcing current. 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. 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.

The features of DS4426 can be summarized as (1)four current DACs 50A to 200A adjustable full-scale range 127 settings each for sink and source; (2)power-supply tracking power-supply sequencing ramp-up and ramp-down tracking control ratiometric tracking support; (3)+2.7V to +5.5V operation; (4)I2C-compatible serial interface; (5)two address input pins allow up to four devices on same I2C bus; (6)lead-free, 28-Pin TQFN Package (4mm x 4mm)with exposed pad; (7)industrial temperature range: -40°C to +85°C.

The absolute maximum ratings of DS4426 are (1)voltage range on SDA, SCL Relative to GND: -0.5V to +6.0V; (2)voltage range on VCC Relative to GND: -0.5V to +6.0V; (3)voltage range on A0, A1, FS[3: 0], GAIN[3: 1], INN[3: 1], INP[3: 1], THR[3: 1], and OUT[3: 0] relative to GND: -0.5V to (VCC + 0.5V)*; (4)operating temperature range: -40°C to +85°C; (5)storage temperature range: -55°C to +125°C; (6)soldering temperature: Refer to the IPC/JEDEC.