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When the supply voltage is low, what can I do to increase the dynamic range of an op-amp?

The op-amps do not operate properly if the input voltage exceeds the input common-mode voltage range specified as one of their electrical characteristics. Therefore, they cannot handle a signal that varies over the full range of the supply voltage (GND to VDD). This has greater impact at low voltage.

An Input and Output (I/O) rail-to-rail op-amp is the preferred choice to amplify a low-voltage signal.
The I/O rail-to-rail op-amp can handle an input signal that swings from GND to VDD. It is suitable for amplifying a low-voltage signal without any input constraints.
However, the output signal from an I/O rail-to-rail op-amp swings only from GND to VDD.

TC75S51 general-purpose op-amp
TC75S51 general-purpose op-amp
TC75S102 I/O rail-to-rail op-amp
TC75S102 I/O rail-to-rail op-amp

To view a list of I/O rail-to-rail op-amps, click the following link:
List of I/O rail-to-rail op-amps

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