Signal Chain Solution for 4-mA to 20-mA HART Enabled Field Instrument Applications

  Signal Chain Solution for 4-mA to 20-mA HART Enabled Field Instrument

Business Wire

NORWOOD, Mass. -- March 26, 2013

Analog Devices, Inc. (NASDAQ: ADI) introduced today the CN0267 demonstration
circuit for a loop powered HART® (Highway Addressable Remote Transducer)
enabled smart transmitter, for industrial applications that need to operate
within a set 3.5-mA power budget. This field instrument circuit demonstrates a
complete low power, high precision signal chain solution with minimum area
overhead, which has been tested and verified by ADI as part of their Circuits
from the Lab™ reference circuits’ initiative.

• To buy and evaluate this circuit and download the application note and watch
the video:

• Connect with engineers and ADI product experts on EngineerZone™, an online
technical support community:

• Find application notes and technical articles about field instrument
solutions from ADI:

This circuit has been compliance tested, verified and registered as an
approved HART solution by the HART Communication Foundation. This ensures that
systems designed with these ADI devices will adhere to HART protocol
requirements and that DEMO-AD5700D2Z is a proven, tested solution.

Combining the lowest power components in their class, this solution enables
system engineers to support increased system functionality including the
communications of diagnostics and additional measurement or calibration data.
The 7-cm by 2.3-cm CN0267 PCB demonstrates a direct sensor interface,
microprocessor and two-way HART communication over a 4- 20-mA loop.

About the CN0267 Circuit Design

CN0267 combines three of ADI’s lowest power, high performance components,
optimized for field instrument designs;

The ADuCM360, a low power, fully integrated, 3.9-kSPS, 24-bit data acquisition
system-on-a-chip incorporating dual, sigma-delta A/D converters, a 32-bit ARM
Cortex^TM M3 MCU, and flash/EE memory. Using less than 1-mA of operating
current it delivers more processing-per-mW of power than any other analog
microcontroller within its class.

The AD5421, is a complete, loop powered, 16-bit, 4-mA to 20-mA DAC that
incorporates a programmable voltage regulator used to power the demonstration
board. The AD5421 consumes less than 300-µA of quiescent current providing a
50 percent power saving and a 55 percent footprint saving over competing

The AD5700 is a complete HART modem IC, consuming 38 percent less power and
supporting a greater than 75 percent saving in board area over alternative

Pricing, Availability and Complementary Components

Product             Sample     Production     Price Each
                                                          Per 1000
DEMO-AD5700D2Z                NOW            $90 (per unit)
AD5421BREZ          NOW        NOW            $ 5.55
AD5700BCPZ-RL7      NOW        NOW            $4.45
ADUCM360BCPZ128     NOW        NOW            $8.58

About Analog Devices

Innovation, performance, and excellence are the cultural pillars on which
Analog Devices has built one of the longest standing, highest growth companies
within the technology sector. Acknowledged industry-wide as the world leader
in data conversion and signal conditioning technology, Analog Devices serves
over 60,000 customers, representing virtually all types of electronic
equipment. Celebrating over 40 years as a leading global manufacturer of
high-performance integrated circuits used in analog and digital signal
processing applications, Analog Devices is headquartered in Norwood,
Massachusetts, with design and manufacturing facilities throughout the world.
Analog Devices' is included in the S&P 500 Index.

Follow ADI on Twitter at

To subscribe to Analog Dialogue, ADI's monthly technical journal, visit:

Photos/Multimedia Gallery Available:



Analog Devices, Inc.
Grainne Murphy, 353-61-495540
Porter Novelli
Andrew MacLellan, 617-897-8270
Press spacebar to pause and continue. Press esc to stop.