The AD5423 is a single-channel, voltage and current output digital-to-analog converter (DAC) that operates with a power supply range from −33 V minimum on AV_SS to +33 V maximum on AV_DD1. The C_HART pin enables a Highway Addressable Remote Transducer^® (HART) signal to be coupled on the current output.

The AD5423 uses a versatile, 4-wire, serial peripheral interface (SPI) that operates at clock rates of up to 50 MHz and is compatible with standard SPI, QSPI^™, MICROWIRE^™, digital signal processor (DSP), and microcontroller interface standards. The interface also features an optional SPI cyclic redundancy check (CRC) and a watchdog timer (WDT). The AD5423 offers improved diagnostic features from earlier versions of similar DACs, such as an integrated, 12-bit diagnostic analog-to-digital converter (ADC).

Product Highlights

1. 16-bit performance.
2. Range of diagnostic features.
3. Integrated 12-bit monitoring ADC.
4. HART compliant.

Applications

• Process control
• Actuator control
• Channel isolated analog outputs
• Programmable logic controller (PLC) and distributed control systems (DCS) applications
• HART network connectivity