Single-Channel, 12-/16-Bit, Serial Input, 4 mA to 20 mA, Current Source DAC, HART Connectivity

The AD5410/AD5420 are low cost, precision, fully integrated 12-/16-bit converters offering a programmable current source output designed to meet the requirements of industrial process control applications. The output current range is programmable at 4 mA to 20 mA, 0 mA to 20 mA, or an overrange function of 0 mA to 24 mA. The output is open-circuit protected. The device operates with a power supply (AVDD) range from 10.8 V to 60 V. Output loop compliance is 0 V to AVDD − 2.5 V.

The flexible serial interface is SPI, MICROWIRE™, QSPI™, and DSP compatible and can be operated in 3-wire mode to minimize the digital isolation required in isolated applications.

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 output to the low end of the selected current range.

The total unadjusted error is typically ±0.01% FSR.

Applications

* Process control

* Actuator control

* PLC

* HART network connectivity

* 16-bit resolution and monotonicity

* Current output ranges: 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA

* ±0.01% FSR typical total unadjusted error (TUE)

* ±3 ppm/°C typical output drift

* Flexible serial digital interface

* On-chip output fault detection

* On-chip reference (10 ppm/°C maximum)

* Feedback/monitoring of output current

* Asynchronous clear function

* Power supply (AVDD) range

* 10.8 V to 40 V; AD5410AREZ/AD5420AREZ

* 10.8 V to 60 V; AD5410ACPZ/AD5420ACPZ

* Output loop compliance to AVDD − 2.5 V

* Temperature range: −40°C to +85°C

* 24-lead TSSOP and 40-lead LFCSP packages