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Maxim > Design Support > Technical Documents > Application Notes > A/D and D/A Conversion/Sampling Circuits > APP 4639
Maxim > Design Support > Technical Documents > Application Notes > Measurement Circuits > APP 4639
Maxim > Design Support > Technical Documents > Application Notes > Sensors > APP 4639
Keywords: signal conditioning, simultaneous-sampling ADCs, power-grid monitoring, precision operational
amplifiers
APPLICATION NOTE 4639
Use High-Performance Simultaneous-Sampling ADCs
for Sensor Signal Conditioning in Industrial
Multichannel Data Acquisition Systems (DASs)
By: Joseph Shtargot, Strategic Applications Engineer
Jul 02, 2010
Abstract:
This application note
will help the designer of high-performance multichannel data acquisition
systems (DASs) to optimize the interface between industrial sensors and a high-performance ADC. The
example used is a power-grid monitoring system. The article explains how to select the proper components to
achieve optimal system performance with the high-resolution MAX11046, MAX1320, MAX1308 multichannel
ADCs. Schematics are shown.
Introduction
Many advanced industrial applications use high-performance multichannel data acquisition systems (DASs) to
manage real-time information from precision industrial sensors. These complex systems require the use of
high-performance, simultaneous-sampling, multichannel ADCs like the MAX11046, MAX1320, and MAX1308.
Consider an advanced three-phase power-line monitoring/measurement system shown in Figure 1. These
industrial applications require accurate simultaneous, multichannel measurement over a wide dynamic range
up to 90dB (depending on the application) at a typical sample rate up to 64ksps. To optimize system
precision, signals from the sensors (CT and PT transformers in Figure 1) should be properly conditioned to
meet the ADCs' input ranges and ensure that the DAS's characteristics will enable measurements that comply
with international standards.
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