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Update ads1115.rst Multiplexer and Gain (#1232)

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Update ads1115.rst notes with gentle warning about over voltage measurement which is not entirely clear at first sight / observation of the sensor.
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Ockert Marais 2021-06-10 12:48:32 +02:00 committed by Jesse Hills
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@ -93,9 +93,15 @@ Configuration variables:
to check the sensor. Defaults to ``60s``.
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
Multiplexer And Gain
Multiplexer and Gain
--------------------
.. note::
As per (`datasheet <http://www.ti.com/lit/ds/symlink/ads1115.pdf>`__, `Adafruit`_) Section 7.3 Note 2:
"No more than VDD + 0.3V must be applied to the analog inputs of the device."
This means if you power the device with 3.3V, take care not to supply the 4 AIN pins with more than 3.6V.
The ADS1115 has a multiplexer that can be configured to measure voltage between several pin configurations. These are:
- ``A0_A1`` (between Pin 0 and Pin 1)