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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC5646C датащи(PDF) 79 Page - Freescale Semiconductor, Inc |
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MPC5646C датащи(HTML) 79 Page - Freescale Semiconductor, Inc |
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79 / 114 page  MPC5646C Microcontroller Data Sheet, Rev. 3 Preliminary—Subject to Change Without Notice Freescale Semiconductor 79 Figure 20. ADC_1 characteristic and error definitions 3 V AINx may exceed VSS_ADC0 and VDD_ADC0 limits, remaining on absolute maximum ratings, but the results of the conversion will be clamped respectively to 0x000 or 0x3FF. 4 During the sample time the input capacitance C S can be charged/discharged by the external source. The internal resistance of the analog source must allow the capacitance to reach its final voltage level within tADC0_S. After the end of the sample time tADC0_S, changes of the analog input voltage have no effect on the conversion result. Values for the sample clock tADC0_S depend on programming. 5 Conversion time = Bit evaluation time + Sampling time + 1 Clock cycle delay. 6 Refer to ADC conversion table for detailed calculations. 7 Total Unadjusted Error: The maximum error that occurs without adjusting Offset and Gain errors. This error is a combination of Offset, Gain and Integral Linearity errors. (2) (1) (3) (4) (5) Offset Error OSE Offset Error OSE Gain Error GE 1 LSB (ideal) Vin(A) (LSBideal) (1) Example of an actual transfer curve (2) The ideal transfer curve (3) Differential non-linearity error (DNL) (4) Integral non-linearity error (INL) (5) Center of a step of the actual transfer curve code out 4095 4094 4093 4092 4091 4090 5 4 3 2 1 0 7 6 1 2 3 4 5 6 7 4090 4091 4092 4093 4094 4095 1 LSB ideal = AVDD / 4096 |
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