AD5420 Single-Channel, 12-/16-Bit, Serial Input, 4 mA to 20 mA, Current Source DAC

The AD5410/AD5420 are low cost, precision, fully integrated 12-/16-bit converters offering a programmable current source 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 output is open-circuit protected. The device operates with a power supply (AVDD) range from 10.8 V to 60 V. Output loop compliance is 0 V to AVDD − 2.5 V. Process Control Actuator Control PLC

The flexible serial interface is SPI, MICROWIRE™, QSPI™, and DSP 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, and an asynchronous CLEAR pin that sets the output to the low end of the selected current range.

The total unadjusted error is typically ±0.01% FSR.

Data Sheet, Rev. A, 9/09

Features and Benefits

12-/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/°C typical output drift

Flexible serial digital interface

On-chip output fault detection

On-chip reference (10 ppm/°C maximum)

Asynchronous clear function

Power supply (AV_DD) range
10.8 V to 40 V; AD5410AREZ/AD5420AREZ
10.8 V to 60 V; AD5410ACPZ/AD5420ACPZ

Output loop compliance to AVDD − 2.5 V

Temperature range: −40°C to +85°C

24-lead TSSOP and 40-Lead LFCSP packages

Reference Designs

Software & Systems Requirements

AD5420 Evaluation Software .ZIP

Data Sheets

Document	note
AD5410/AD5420: Single-Channel, 12-/16-Bit, Serial Input, 4 mA to 20 mA, Current Source DAC, HART Connectivity Data Sheet (Rev. H)	PDF 514 kB

Application Notes

Document	note
AN-1203: Simplified 16-Bit, 4 mA-to-20 mA Output Solution Using the AD5420 (Rev. A)	PDF 97 kB
AN-1065: Configuring the AD5420 for HART Communication Compliance (Rev. A)	PDF 163 kB

User Guides

Document	note
UG-441: Evaluating the AD5420 Single-Channel, 16-Bit, Serial Input, Current Source DAC	PDF 414 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD5420ACPZ-REEL Production	40 ld LFCSP (6x6mm w/4.1mm pad)	REEL 2500	-40 to 85C	0	4.95	Y
AD5420ACPZ-REEL7 Production	40 ld LFCSP (6x6mm w/4.1mm pad)	REEL 750	-40 to 85C	0	4.95	Y
AD5420AREZ Production	24 ld TSSOP-EP(EP=3.2mm)	OTH 62	-40 to 85C	6.52	5.35	Y
AD5420AREZ-REEL7 Production	24 ld TSSOP-EP(EP=3.2mm)	REEL 1000	-40 to 85C	0	5.35	Y