The AD202 are general purpose, two-port,transformer-coupled isolation amplifiers
In applications where the output ofthermocouples must be isolated, a low drift input amplifier can be used with an AD204,as shown in Picture.
A three-pole active filter is included in the design toget normal-mode rejection of frequencies above a few Hz and to provide enhanced common-mode rejection at 60 Hz.
If offset adjustment is needed, it is best done at the trim pins of the OP07 itself; gain adjustment can be done at the feedback resistor. Note that the isolated supply current is large enough to Mandate the use of 1 mF supply bypass capacitors.
This circuit from AD202 Application
Technorati Tags: Isolated Thermocouple Transducer Circuit
In applications where the output ofthermocouples must be isolated, a low drift input amplifier can be used with an AD204,as shown in Picture.
A three-pole active filter is included in the design toget normal-mode rejection of frequencies above a few Hz and to provide enhanced common-mode rejection at 60 Hz.
If offset adjustment is needed, it is best done at the trim pins of the OP07 itself; gain adjustment can be done at the feedback resistor. Note that the isolated supply current is large enough to Mandate the use of 1 mF supply bypass capacitors.
This circuit from AD202 Application
Technorati Tags: Isolated Thermocouple Transducer Circuit
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