Freescale-semiconductor 56F8122 Manual do Utilizador Página 123

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Analog-to-Digital Converter (ADC) Parameters
56F8322 Technical Data, Rev. 10.0
Freescale Semiconductor 123
Preliminary
Signal-to-noise plus distortion ratio
SINAD 59.1 db
Total Harmonic Distortion
THD 60.6 db
Spurious Free Dynamic Range
SFDR 61.1 db
Effective Number Of Bits
8
ENOB 9.6 Bits
1. INL measured from V
in
= .1V
REFH
to V
in
= .9V
REFH
10% to 90% Input Signal Range
2. LSB = Least Significant Bit
3. ADC clock cycles
4. Assumes each voltage reference pin is bypassed with 0.1µF ceramic capacitors to ground
5. The current that can be injected or sourced from an unselected ADC signal input without impacting the performance of
the ADC. This allows the ADC to operate in noisy industrial environments where inductive flyback is possible.
6. Absolute error includes the effects of both gain error and offset error.
7. Please see the 56F8300 Peripheral User’s Manual for additional information on ADC calibration.
8. ENOB = (SINAD - 1.76)/6.02
Table 10-24 ADC Parameters (Continued)
Characteristic Symbol Min Typ Max Unit
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