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Based on the programmable gain amplifier chip PGA309's Coarse Offset and zero Adjustment function, a set of algorithms is designed in this paper to implement the measurement system program-controlled hardware zero adjustment without having to manually adjust the multiturn potentionmeters or program-controlled adjust the digital potentionmeters, thus avoiding all kinds of shortcomings which exists...
The paper introduces a kind of infrared temperature sensor having wide measure range and stable readings which is developed based on thermopile detector TPS334 and PGA309. The principle of PGA309 signal amplification, ambient temperature compensation and nonlinearity correction is discussed, and the relevant circuit and compensation algorithm are given. The sensor has accuracy up to 3 Celsius degree...
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