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How to interface figaro tgs5042 to pic16f877a?

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piskot

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can anyone help me how to interface figaro tgs5042 to pic16f877a. do i need an amplifier before i can connect it to pic?

thank you
 

Re: figaro

An application circuit is given in the TGS5042 datasheet. You don't need necessarily the said Analog Devices amplifier, but a standard FET or CMOS OP with an input voltage range at least including the negative supply, e. g. TLC271 or any R2R amplifier. Also the 22 uF filter cap may be replaced by a lower value (e. g. 1 to 4.7u F ceramics) for faster response with optional software filtering.
 
figaro

what amplifier do i need to amplify dc without the need of frequency generator
 

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