[UNVERIFIED] Astra diagram pass
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@@ -9,13 +9,7 @@ use `SENSOR_GND` and are kept separate from ignition/injector return currents.
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## General 0--5 V channels
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```text
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connector -- transient clamp -- R_TOP --+-- ADC-local C_HOLD -- ADC
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R_BOTTOM
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SENSOR_GND
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```
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`R_TOP` is the divider's upper resistor; do not add a separate series
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`R_PROT` in the normal passive channel. It is the element that limits current
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@@ -45,11 +39,7 @@ of `+5V_SENS` and sample it close to the sensor channel.
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## NTC temperature channels
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```text
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+5V_SENS -- R_PULLUP --+-- NTC -- SENSOR_GND
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attenuator / local filter --> ADC
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```
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The attenuator and ADC protection are required even if a normal temperature
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range appears below 3.3 V: an open thermistor raises the node to `+5V_SENS`.
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