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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST10F276 датащи(PDF) 194 Page - STMicroelectronics |
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ST10F276 датащи(HTML) 194 Page - STMicroelectronics |
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194 / 229 page  Electrical characteristics ST10F276 194/229 then half a count (considering the worst case when VA = 5V): The other conditions to verify are if the time constants of the transients are really and significantly shorter than the sampling period duration TS: For a complete set of parameters characterizing the ST10F276 A/D converter equivalent circuit, refer to A/D Converter Characteristics table at page 185. 23.8 AC characteristics 23.8.1 Test waveforms Figure 50. Input/output waveforms Figure 51. Float waveforms VA RS RF RL RSW RAD ++ + + REQ ------------------------------------------------------------------------- 2.35mV = ⋅ 1 2 ---LSB < τ1 RSW RAD + () = CS 2.8ns = ⋅ << TS = 1µs 10 τ2 ⋅ 10R ⋅ L = CS CP1 CP2 ++ () 290ns = ⋅ < TS = 1µs 2.4V 0.4V Test Points 2.0V 2.0V 0.8V 0.8V AC inputs during testing are driven at 2.4V for a logic ‘1’ and 0.4V for a logic ‘0’. Timing measurements are made at VIH min. for a logic ‘1’ and VIL max for a logic ‘0’. Timing Reference Points VLOAD + 0.1V VLOAD - 0.1V VOH - 0.1V VOL + 0.1V VLOAD VOL VOH For timing purposes a port pin is no longer floating when VLOAD changes of ±100mV occur. It begins to float when a 100mV change from the loaded VOH/VOL level occurs (IOH/IOL = 20mA). |
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