AD5420 Datasheet

• 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 (AV_DD) range
  • 10.8 V to 40 V; AD5420AREZ
  • 10.8 V to 60 V; AD5420ACPZ
• Output loop compliance to AV_DD − 2.5 V
• Temperature range: −40°C to +85°C
• 24-lead TSSOP and 40-lead LFCSP packages

• Process control
• Actuator control
• PLC
• HART network connectivity

The AD5420 are low cost, precision, fully integrated 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 AV_DD − 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.