The AD5420 is low cost, precision, fully integrated 16-bit converter 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.
- 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)
- Asynchronous clear function
- Power supply (AVDD) range
- Output loop compliance to AVDD -2.5 V
- Temperature range: -40°C to +85°C
- 24-lead TSSOP and 40-Lead LFCSP packages
- Applications
- Process Control
- Actuator Control
- PLC
