3690
правок
(Новая страница: «*Inactive (open), high impedance. Such outputs are called “open collectors”») |
(Новая страница: «Input stage of Ax channel consists of an analogue-to-digital converter ADCx and an input resistor Rx (100kOhm). The ADC has a high input impedance, so it doesn'…») |
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Input stage of Ax channel consists of an analogue-to-digital converter ADCx and an input resistor Rx (100kOhm). | |||
The ADC has a high input impedance, so it doesn't affect the channel operation even if the channel works as output. | |||
In input mode the Tx switch is inactive (open) and, thus, does not affect voltage measuring at the channel terminals. Input impedance in input mode is determined by the Rx resistance. | |||
If the channel terminal is left floating, the input voltage measured by ADCs is pulled down to zero by the Rx resistance. | |||