MC9S08SG32 Datasheet, PDF (148/328 Pages) Freescale Semiconductor, Inc – HCS08 Microcontrollers

Chapter 8 Analog-to-Digital Converter (S08ADC10V1)
converter yields the lower code (and vice-versa). However, even small amounts of system noise can cause
the converter to be indeterminate (between two codes) for a range of input voltages around the transition
voltage. This range is normally around 1/2LSB and increases with noise. This error may be reduced by
repeatedly sampling the input and averaging the result. Additionally the techniques discussed in
Section 9.6.2.3 reduces this error.
Non-monotonicity is defined as when, except for code jitter, the converter converts to a lower code for a
higher input voltage. Missing codes are those values never converted for any input value.
In 8-bit or 10-bit mode, the ADC is guaranteed to be monotonic and have no missing codes.
MC9S08SG32 Data Sheet, Rev. 7
138
Freescale Semiconductor