Figure 2. Sample State; Figure 3. Hold State - ST STM32 Application Note

AN2834
1. Sample state: capacitors are charging to V
time.
1. Hold state: the input is disconnected, capacitors hold input voltage. Sb switch is open, then S1-S11
switched to ground and Sa switched to V

Figure 2. Sample state

voltage. Sa switched to V
IN

Figure 3. Hold state

.
REF
DocID15067 Rev 3
ADC internal principle
, Sb switch closed during sampling
IN
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