Field Instruments/ Smart Transmitters

In field instrument and smart transmitter systems, designers work with various types of measurement approaches including temperature, pressure, flow, and voltage. Here, ADI's expert applications engineers offer tailored applications solutions to each of these implementations, along with considerations for line and loop powered interfaces.

SELECT A SOLUTION

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Thermocouple Measurement using 16/24 bit AD7792/AD7793 sigma delta ADCs. These ADCs are complete with an analog front end PGA that allows for direct connection to the ADC. It also includes internal current sources required for the TC compensation measurement providing a totally integrated solution.

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2 Wire RTD measurement using the AD7781, 20 bit Sigma Delta ADC.This solution is ratiometric therefore any drift in the current source is canceled out as the current source is also used to drive the reference input resistor.

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3 wire 16/24 bit RTD measurement. The AD7792/AD7793 are 16/24 bit Sigma Delta complete with an analog front end PGA that allows for direct connection to the ADC. It also includes internal current sources required for the RTD measurement providing a totally integrated solution.

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4 wire 16/24 bit RTD measurement. The AD7792/AD7793 are 16/24 bit Sigma Delta complete with an analog front end PGA that allows for direct connection to the ADC. It also includes internal current sources required for the RTD measurement providing a totally integrated solution.

Resistive Bridge
Capacitive Bridge

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Resistive Bridge Pressure Sensor Solution using AD7794 24 Bit Sigma Delta ADC.

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Capacitive Bridge Pressure Sensor Soltuion using AD7746 Capacitive sensing technology.

Differential Resistive Measurement
Differential Capacitive Measurement

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Resistive Bridge Flowmeter measurement using AD7794 24 Bit Sigma Delta ADC.

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Differential Pressure Flowmeter using AD7746 Capacitive sensing technology.

Low Power Sigma-Delta ADC
High Performance Sigma Delta ADC

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Low Power High performance Sigma Delta Measurement using AD7781 20 Bit Sigma Delta ADC.

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High Performance Voltage Measuremetn using AD7193 24 bit Sigma Delta.

SELECT A PRODUCT

Temperature Measurement

Pressure Measurement

Flow Measurement

Voltage Measurement

Loop Interface Stage

Circuits from the Lab

Learning Resources

Webinar: Design Considerations for Industrial, Instrumentation & Process Control Systems
Webinar: Data Conversion Applications and Solutions for Precision Process Control
Article: Build a Smart Analog Process-Instrument Transmitter with Low-Power Converters and a Microcontroller
AN-534 Application Note: Adding HART® Capability to the AD421, Loop-Powered 4 mA–20 mA DAC Using the 20C15 HART Modem (pdf)

Circuit Types:	All ADC Drivers
Applications:	Energy, Field Instruments/ Smart Transmitters, Instrumentation & Measurement, Process Control & Industrial Automation
Optimized For:	High Precision; High Resolution; Low Distortion; Low Noise

Circuit Types:	Clocking, RF/IF, Signal Generation, Signal Processing
Applications:	Communications, Field Instruments/ Smart Transmitters, Instrumentation & Measurement
Optimized For:	High Speed; Low Distortion

Circuit Types:	All DAC Output, General DAC Output, Isolation
Applications:	Building Control & Automation, Field Instruments/ Smart Transmitters, Heating, Ventilation & Air Conditioning, Instrumentation & Measurement, Process Control & Industrial Automation, Programmable Logic Controllers/ Distributed Control Systems
Optimized For:	High Resolution; Isolation

Circuit Types:	All DAC Output, General DAC Output
Applications:	Instrumentation & Measurement, Process Control & Industrial Automation
Optimized For:	High Precision; High Resolution

PROCESS CONTROL & INDUSTRIAL AUTOMATION