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SPC572L64F2 Datasheet(PDF) 45 Page - STMicroelectronics |
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SPC572L64F2 Datasheet(HTML) 45 Page - STMicroelectronics |
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45 / 112 page ![]() DocID027866 Rev 5 45/112 SPC572Lx Electrical characteristics 111 Figure 13. Input equivalent circuit (SARB channels) RSW1 CP3 CS VDD Sampling RSW: Channel Selection Switch Impedance (two contributions RSW1 and RSW2) RAD: Sampling Switch Impedance CP: Pin Capacitance (three contributions, CP1, CP2 and CP3) CS: Sampling Capacitance RCMSW: Common mode switch RCML: Common mode resistive ladder The above figure can be used as approximation circuitry for external filtering definition. It is applicable for all SARB channels except AN 16, AN17 and AN24 (Fast channels). CP1 RAD Channel Selection CP2 Extended RSW2 Switch Common mode switch Common mode resistive ladder INTERNAL CIRCUIT SCHEME Table 24. ADC pin specification(1) Symbol C Parameter Conditions Value Unit Min Max ILK_INUD CC C Input leakage current, two ADC channels input with weak pull-up and weak pull-down TJ <40 °C, no current injection on adjacent pin —70 nA CTJ < 150 °C, no current injection on adjacent pin —220 ILK_INUSD CC C Input leakage current, two ADC channels input with weak pull-up and strong pull-down TJ <40 °C, no current injection on adjacent pin —80 nA CTJ < 150 °C, no current injection on adjacent pin —250 |
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