[Video] Analog Devices introduced a precision 16-bit DAC with on-board power management circuitry designed for loop-powered, smart transmitter applications used in industrial equipment. The AD5421 includes a voltage regulator, which is commonly used to power itself and other devices in the smart transmitter. The regulator provides a programmable 1.8-V to 12-V output voltage. The device also contains precision 1.25-V and 2.5-V references, eliminating the need for a discrete regulator and voltage reference. Consuming only 250 µA of quiescent current, the AD5421 offers 0.05 percent maximum TUE (Total Unadjusted Error) and 5 ppm (parts per million) drift performance. The AD5421 can be used with standard HART (Highway Addressable Remote Transducer) protocol circuitry and offers NAMUR compliant output ranges. The device is specified over the extended industrial temperature range of –40°C to +105°C and incorporates a standard SPI (serial peripheral interface) compatible interface.
