Analog Devices : Digital to Analog Converter ICs Solutions Bulletin (Volume 9, Issue 3)


	Volume 9, Issue 3	YOUR SEMICONDUCTOR SOLUTIONS RESOURCE

C o n t e n t s

Precision DACs Offer Up to 60 V Output Range >>

Single Chip DACs Improve Reliability and Data Quality >>

Digipots Enable New Levels of Precision Calibration in Industrial Systems >>

New Tool Takes Guesswork Out of Finding the Perfect DAC >>

Most Accurate Voltage/Current Output Driver for Industrial Control >>

Highest Precision Accurate Low Voltage Buffered Quad DAC >>

Dual DAC Solutions Target Energy Efficient Applications >>

New Transmit DAC Architecture Provides Direct to RF Output >>

Input/Output Port Eases Design of High Density Optical Line Cards >>

DAC Integrates QAM Encoder, Interpolator, and Upconverter >>

DAC Evaluation Platform Provides Time-Saving and Flexible Evaluation Solution >>

All prices in this bulletin are in USD in quantities greater than 1000 (unless otherwise noted), recommended lowest grade resale, FOB U.S.A.

Highly Integrated Single Chip DAC ICs Improve Reliability and Data Quality in Process Control Equipment

In a host of automation systems, from mining to petrochemical refinement, industrial applications require solutions to the growing demand for robust, highly reliable, high performance process control equipment. Minimized component count, operation over large temperature and supply tolerances, and performance are key in addressing the challenges faced by OEMs in an increasingly competitive and safety conscious marketplace.

ADI offers two new families of DACs that help solve critical process control challenges: the AD54xx family of highly integrated, 12-bit and 16-bit digitally controlled current output ICs. These products handle industry-standard 4 mA to 20 mA data transmission and diagnostic requirements, eliminating bulky discrete analog drive and fault detect circuitry, thus increasing the reliability of the system.

Enabled by ADI's proprietary iCMOS® industrial manufacturing process technology, the AD5420 operates from single supply voltages of 10.8 V to 60 V. The output current range is software-selectable from options 4 mA to 20 mA, 0 mA to 20 mA, or an overrange setting of 0 mA to 24 mA. Analog outputs can drive resistive loads up to 1.5 kΩ and inductive loads of 1 H and feature 0.1% TUE (total unadjusted error). Internal fault detection circuitry provides hardware and software indication of system faults such as opens in cable wiring or overtemperature conditions. The part also integrates a digital slew rate control feature, thereby reducing the rate of change of the output current in systems with large inductance and an asynchronous CLEAR pin for output control during power-up/power-down conditions. The flexible serial interface is SPI and MICROWIRE™-compatible and can be operated in 3-wire mode to minimize the digital isolation required in per channel isolated systems. The AD5410 is a pin-compatible 12-bit device.

Current Source and Voltage Output DACs

The AD5422 and AD5412 are, respectively, 16-bit and 12-bit current source and voltage output DACs that operate from a single 12 V to 48 V supply or dual ±12 V to ±24 V supplies. All devices in the AD54xx family integrate a precision 5 ppm/°C reference and are specified over the extended industrial temperature range of –40°C to +105°C. Devices are housed in LFCSP and TSSOP packaging.

AD5420 Features

Resolution: 16-bits
Current output: 0.1% TUE
Drive capability: 1.5 kΩ, 1 H
Integrated 5 ppm/°C reference
On-chip fault detection
Asynchronous output control
Package: 24-lead TSSOP, 6 mm × 6 mm LFCSP

Part Number	Resolution/Configuration	Compliance (V)	Accuracy (TUE)	Price ($U.S.)
AD5410	12-bit, 4 mA to 20 mA current source DAC	10.8 to 60	0.3%	3.35
AD5412	12-bit, 4 mA to 20 mA current source and voltage output DAC	±12 to ±24, 10.8 to 40	0.3%	3.79
AD5420	16-bit, 4 mA to 20 mA current source DAC	10.8 to 60	0.1%	4.32
AD5422	16-bit, 4 mA to 20 mA current source and voltage output DAC	±12 to ±24, 10.8 to 40	0.1%	4.95