Single Channel, 16-Bit Current/Voltage Output DAC with HART Connectivity

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 AVSS to +33 V maximum on AVDD1. The CHART 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

* 16-bit performance.

* Range of diagnostic features.

* Integrated 12-bit monitoring ADC.

* HART compliant.

Applications

* Process control

* Actuator control

* Channel isolated analog outputs

* Programmable logic controller (PLC) and distributed control systems (DCS) applications

* HART network connectivity

* 16-bit resolution and monotonicity

* Current or voltage output available on a single terminal

* Current output ranges: 0 mA to 20 mA, 4 mA to 20 mA, 0 mA to 24 mA, ±20 mA, ±24 mA, and −1 mA to +22 mA

* Voltage output ranges (with 20% overrange): 0 V to 5 V, 0 V to 10 V, ±5 V, and ±10 V