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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST72141K2 датащи(PDF) 126 Page - STMicroelectronics |
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ST72141K2 датащи(HTML) 126 Page - STMicroelectronics |
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126 / 132 page  ST72141K 126/132 MEMORY AND PERIPHERAL CHARACTERISTICS (Cont’d) Notes: 1) Unless otherwise specified, typical data is based on TA=25°C and VDD-VSS=5V. This data is provided only for design guidelines and is not tested. 2) Tested in production at TA=25°C, characterized over all temperature range. 3) ADC Accuracy vs. Negative Injection Current: For IINJ-=0.8mA, the typical leakage induced inside the die is 1.6µA and the effect on the ADC accuracy is a loss of 1 LSB by 10K Ω increase of the external analog source impedance. These measurement results and recommendations have been done under worst conditions for injection: - negative injection - injection to an Input with analog capability, adjacent to the enabled Analog Input - at 5V VDD supply, and worst case temperature. 4) Data based on characterization results, not tested in production. ADC Analog to Digital Converter (8-bit) Symbol Parameter Conditions Min Typ 1) Max Unit |TUE| Total unadjusted error 3) TA=25°C,VDD=VDDA=5V, 2) fCPU=8MHz 2 LSB OE Offset error 3) -1 1 GE Gain Error 3) -2 2 |DLE| Differential linearity error 3) 1 |ILE| Integral linearity error 3) 2 VAIN Conversion range voltage VSSA VDDA V IADC A/D conversion supply current fADC=fCPU=4MHz VDD=VDDA=5V 1mA tSTAB Stabilization time after ADC enable 30 µs tLOAD Sample capacitor loading time 8 32 µs 1/fADC tCONV Hold conversion time 8 32 µs 1/fADC RAIN External input resistor 20 4) k Ω RADC Internal input resistor 18 k Ω CSAMPLE Sample capacitor 22 pF |
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