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AN546
Note that the digital output value is 00h for the analog input voltage range of 0 to 1LSb. In some converters, the first transition point is at 0.5LSb and not at 1LSb as shown in Figure 2. Either way, by knowing the transfer function the user can appropriately interpret the data.
Using the Analog-to-Digital (A/D) Converter
Sumit Mitra, Stan D’Souza, and Russ Cooper Microchip Technology Inc.
Transition Point
The analog input voltage at which the digital output switches from one code to the next is called the “Transition Point.” The transition point is typically not a single threshold, but rather a small region of uncertainty (Figure 3). The transition point is therefore defined as the statistical average of many conversions.
AN546 Datasheet
