GXSC Single-Channel 16-Bit DAC Replaces AD5422 in PLC Applications

Programmable Logic Controllers (PLCs) serve as control terminals in industrial automation and process control. Through logical operations, data processing, and instruction output, they enable closed-loop process control and coordinated equipment operation. The PLC analog output module serves as the critical link for converting digital control commands into continuous analog signals. GXSC’s digital-to-analog converter (DAC) features 16-bit high resolution, programmable voltage/current dual-mode output, minimal temperature drift, and a highly integrated, simplified architecture that fully meets the application requirements of programmable logic controllers.

The GXSC DAC features built-in programmable current sources and programmable voltage outputs to meet the needs of industrial process control applications. The output current range can be programmed to 4 mA to 20 mA, 0 mA to 20 mA, or an overrange of 0 mA to 24 mA. The voltage output is provided via a dedicated pin, which can be configured to deliver output ranges of 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V; All ranges provide 10% overrange.

The GXSC DAC’s analog outputs feature short-circuit and open-circuit protection and can drive a 1μF capacitive load. Its AVDD operating voltage range is 10.8V to 40V, and the output loop compliance voltage range is 0V to AVDD − 2.5V. Additionally, the GXSC DAC’s flexible serial interface is SPI and MICROWIRE compatible and can operate in three-wire mode, significantly reducing digital isolation requirements for isolated applications. The device also includes a power-on reset function, ensuring the device powers up in a known state. The device also features an asynchronous clear pin (CLEAR), which can set the output to a zero-level/mid-level voltage or to the low end of the selected current range.

GXSC DAC Features:

6-bit resolution and monotonicity

Current output range: 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA

Total Unadjusted Error (TUE): ±0.01% FSR (typical)

Output Drift: ±3 ppm FSR/°C

Voltage Output Range: 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V; Output Drift: ±2 ppm FSR/°C

Flexible serial digital interface

On-chip output fault detection

On-chip reference voltage source: 10 ppm/°C (maximum)

Optional regulated DVCC output

Asynchronous zeroing function

Current loop compliance voltage: AVDD – 2.5 V

Temperature range: −40°C to +105°C

Available in TSSOP/QFN packages