Extended Range Incremental Sigma Delta ADC
The IP reduces the required sampling time (one order of magnitude) compared to the other industrially and academically reported ER-I-SD converters. This makes the IP suitable for applications where the input is available only for a short period of time, for example IR sensor arrays.
The built-in offset cancellation subtracts a deterministic offset voltage from the input signal. This function is suitable for cancelling the inherent offset of the IR sensors.
The AXIOM_ERISD_ADC_1MS16b has a built-in variable gain amplifier (VGA) to provide selectable gains from 0 to 20 dB in 1 dB steps. This function provides 3-bit extension to the non-simultaneous dynamic range of the converter.
The chip is functional in a wide temperature range from -223 °C to 85 °C. Therefore the ADC is suitable from commercial to space applications.
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Block Diagram of the Extended Range Incremental Sigma Delta ADC

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