Recision DACs for industrial automation systems

Sasco Holz presents the new AD5422, AD5420, AD5412 and AD5410 from Analog Devices – new precision DACs that significantly improve the reliability of industrial process control applications in harsh factory environments, including those operating under extreme temperatures or high compliance voltages. The offering includes four 12-bit to 16-bit single-channel DACs that integrate user-programmable current source and voltage output, making them ideally suited for factory process control, distributed control, and smart transmitter systems.

The new products leverage the technological advancements enabled by Analog Devices’ iCMOS™ industrial process technology, allowing them to achieve the high voltages needed by industrial applications. The AD5422 singlechannel 16-bit DAC operates from a single 12-V to 48-V supply, or dual ±12 V to ±24V supplies. The output configuration is software selectable from options of 5 V, 10 V, ±5V and ±10 V in voltage mode and 4–20mA, 0–20mA, and 0–24mA in current mode. All output spans include an additional over-range setting.

The AD5422 achieves an accuracy level of 0.1 percent TUE (total unadjusted error) while operating in voltage or current mode and includes a precision 5-ppm/ºC internal reference. Internal fault detection circuitry provides hardware and software indication of line faults, such as opens or shorts in cable wiring or remotely located loads. The device also integrates an overtemperature indicator. To sense output voltage, it includes a buffered voltage output with force and sense capability that can compensate for series protection resistors and fieldwiring resistance. The on-chip programmable precision output amplifier allows rail-to-rail output swing to be achieved, maximizing dynamic range and enabling the device to deliver the performance needed in a wide variety of industrial applications. Analog outputs can drive capacitive loads up to 1 µF and inductive loads up to 1H.

The AD5412 is a pin-compatible single-channel 12-bit current source and voltage output DAC. The AD5420 (16- bit) and AD5410 (12-bit) operate in current source mode only.

With a single 12 V to 60 V supply, their output configuration is software selectable from 4–20mA, 0–20mA and 0– 24mA options.

The new DACs incorporate a 30-MHz serial peripheral interface (SPI), power-on reset and hardware CLR and CLRselect functionality for output control. Each device is fully specified over the industrial temperature range.

All of the devices are housed in 24-lead TSSOP (thin-shrink small-outline) and 40-lead LFCSP (lead-frame chip-scale) packages. Sample units are now available.

Order your sample now! At your local Sasco Holz Branch Office.