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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.
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