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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST72325AR7-Auto 데이터시트(PDF) 222 Page - STMicroelectronics |
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ST72325AR7-Auto 데이터시트(HTML) 222 Page - STMicroelectronics |
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222 / 243 page  Obsolete Product(s) - Obsolete Product(s) Electrical characteristics ST72325xxx-Auto 222/243 Doc ID 13770 Rev 3 19.12.3 ADC accuracy Figure 99. ADC error classification Table 138. ADC accuracy Symbol Parameter(1) Conditions Typ Max(2) Unit 48/60 Kbyte Flash 16/32 Kbyte Flash |ET| Total unadjusted error VDD =5V (1) CPU in run mode @ fADC 2 MHz 34 6 LSB |EO| Offset error 2 3 5 |EG| Gain error 0.5 3 4.5 |ED| Differential linearity error 12 2 |EL| Integral linearity error 3 1. ADC Accuracy versus Negative Injection Current: Injecting negative current may reduce the accuracy of the conversion being performed on another analog input. Any positive injection current within the limits specified for IINJ(PIN) and IINJ(PIN) in Section 19.8 does not affect the ADC accuracy. 2. Data based on characterization results, monitored in production to guarantee 99.73% within ± max value from -40°C to 125°C (± 3 distribution limits). EO EG 1LSBIDEAL 1LSB IDEAL V AREF V SSA – 1024 -------------------------------------------- = Vin (LSBIDEAL) Digital Result ADCDR 1023 1022 1021 5 4 3 2 1 0 7 6 1 234 567 1021 1022 1023 1024 (1) (2) ET ED EL (3) VAREF VSSA Legend: (1) Example of an actual transfer curve (2) The ideal transfer curve (3) End point correlation line ET = Total Unadjusted Error: maximum deviation between the actual and the ideal transfer curves. EO = Offset Error: deviation between the first actual transition and the first ideal one. EG = Gain Error: deviation between the last ideal transition and the last actual one. ED = Differential Linearity Error: maximum deviation between actual steps and the ideal one. EL = Integral Linearity Error: maximum deviation between any actual transition and the end point correlation line. |
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