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Isolated_data_acquisition_system

2016-10-15 06:56  
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Isolated_data_acquisition_system
This circuit shows an 8-input LTC1090 data-acquisition IC connected to a system with 500-V isolation (provided by 4N28 opto-isolators). The number of channels can be increased to 16, 24, 32, etc, with one additional opto-isolator used to increase the number of channels in multiples of 8. Up to 24 channels can be powered directly by the LT1021. The circuit is capable of transferring serial data at about a 15-kHz rate. A code written for the Motorola 68HC05 processor is available from Linear Technology.