Product Details
●The AD5749 is a single channel, low cost, precision, current output driver with hardware or software programmable output ranges. The software ranges are configured via an SPI-/MICROWIRE™\- compatible serial interface. The AD5749 targets applications in PLC and industrial process control. The analog input to the AD5749 is provided from a low voltage, single-supply digital-to- analog converter (DAC) and is internally conditioned to provide the desired output current/voltage range.
●The output current range is programmable across two current ranges: 0 mA to 24 mA, or 4 mA to 20 mA. Current output is open-circuit protected and can drive inductive loads of 0.1 H. The device is specified to operate with a power supply range from 10.8 V to 55 V. Output loop compliance is 0 V to AVDD − 2.75 V.
●The flexible serial interface is SPI and MICROWIRE compatible and can be operated in 3-wire mode to minimize the digital isolation required in isolated applications. The interface also features an optional PEC error checking feature using CRC-8 error checking, useful in industrial environments where data communication corruption can occur.
●The device also includes a power-on reset function ensuring that the device powers up in a known state and an asynchronous CLEAR pin that sets the outputs to the low end of the selected current range.
●An HW SELECT pin is used to configure the part for hardware or software mode on power-up.
●Applications
● Process control
● Actuator control
● PLCs
●### Features and Benefits
● Current output ranges: 0 mA to 24 mA or 4 mA to 20 mA
● ±0.03% FSR typical total unadjusted error (TUE)
● ±5 ppm/°C typical output drift
● 2% overrange
● Flexible serial digital interface
● On-chip output fault detection
● PEC error checking
● Asynchronous CLEAR function
● Power supply range
● AVDD: 12 V (± 10%) to 55 V (maximum)
● Output loop compliance to AVDD − 2.75 V
● Temperature range: −40°C to +105°C
● 32-lead, 5 mm × 5 mm LFCSP package
