AD5422 Single Channel, 16-Bit, Current Source & Voltage Output DAC, HART Connectivity

The AD5412/AD5422 are low cost, precision, fully integrated 12-/16-bit digital-to-analog converters (DAC) offering a programmable current source and programmable voltage output designed to meet the requirements of industrial process control applications.

The output current range is programmable at 4 mA to 20 mA, 0 mA to 20 mA, or an overrange function of 0 mA to 24 mA.

The LFCSP version of this product has a CAP2 pin so that the HART signals can be coupled onto the current output of the AD5412/AD5422.

Voltage output is provided from a separate pin that can be configured to provide 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V output ranges; an overrange of 10% is available on all ranges.

Analog outputs are short and open-circuit protected and can drive capacitive loads of 1 µF.

The device operates with an AVDD power supply range from 10.8 V to 40 V. Current loop compliance voltage is 0 V to AVDD − 2.5 V. The flexible serial interface is SPI- and MICROWIRE™-compatible and can be operated in 3-wire mode to minimize the digital isolation required in isolated applications.

The device also includes a power-on-reset function, ensuring that the device powers up in a known state. The part also includes an asynchronous clear pin (CLEAR) that sets the outputs to zero-scale/midscale voltage output or the low end of the selected current range.

The total output error is typically ±0.01% in current mode and ±0.01% in voltage mode.

Applications

Process controls
Actuator controls
PLC
HART network connectivity (LFCSP package only)

Features and Benefits

16-bit resolution and monotonicity

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

±0.01% FSR typical total unadjusted error (TUE)

±3 ppm FSR/°C output drift

Voltage output ranges: 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V

10% overrange
±0.01% FSR typical TUE
±2 ppm FSR/°C output drift

10% overrange

±0.01% FSR typical TUE

±2 ppm FSR/°C output drift

Flexible serial digital interface

On-chip output fault detection

On-chip reference: 10 ppm/°C maximum

Optional regulated DVCC output

Asynchronous clear function

Power supply range

AVDD: 10.8 V to 40 V
AVSS: −26.4 V to −3 V/0 V

AVDD: 10.8 V to 40 V

AVSS: −26.4 V to −3 V/0 V

Current loop compliance voltage: AVDD – 2.5 V

Temperature range: −40°C to +105°C

TSSOP and LFCSP packages

Reference Designs

Software & Systems Requirements

AD5422 Evaluation Software .ZIP

Data Sheets

Document	note
AD5412/AD5422: Single Channel, 12-/16-Bit, Serial Input, Current Source and Voltage Output DACs, HART Connectivity Data Sheet (Rev. M)	PDF 1.39 M

Application Notes

Document	note
AN-1313: Configuring the AD5422 to Combine Output Current and Output Voltage to a Single Output Pin (Rev. 0)	PDF 413 kB
AN-1241: Simplified 16-Bit Voltage Output and 4 mA-to-20 mA Output Solution Using the AD5422 (Rev. A)	PDF 166 kB

User Guides

Document	note
UG-442: Evaluating the AD5422 Single Channel, 16-Bit, Current Source and Voltage Output DAC, HART Connectivity	PDF 586 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD5422ACPZ-REEL Production	40 ld LFCSP (6x6mm w/4.10mm pad)	REEL 2500	-40 to 105C	0	5.6	Y
AD5422ACPZ-REEL7 Production	40 ld LFCSP (6x6mm w/4.10mm pad)	REEL 750	-40 to 105C	0	5.6	Y
AD5422AREZ Production	24 ld TSSOP-EP(EP=3.2mm)	OTH 62	-40 to 105C	7.19	5.9	Y
AD5422AREZ-REEL Production	24 ld TSSOP-EP(EP=3.2mm)	REEL 2500	-40 to 105C	0	5.9	Y
AD5422BCPZ-REEL Production	40 ld LFCSP (6x6mm w/4.10mm pad)	REEL 2500	-40 to 105C	0	6.35	Y
AD5422BCPZ-REEL7 Production	40 ld LFCSP (6x6mm w/4.10mm pad)	REEL 750	-40 to 105C	0	6.35	Y
AD5422BREZ Production	24 ld TSSOP-EP(EP=3.2mm)	OTH 62	-40 to 105C	8.28	6.79	Y
AD5422BREZ-REEL Production	24 ld TSSOP-EP(EP=3.2mm)	REEL 2500	-40 to 105C	0	6.79	Y