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.. _cpn_mcp3008:

MCP3008
==============

MCP3008 is a 10-bit successive approximation analog-to-digital converter (ADC) with 8 input channels and an SPI (Serial Peripheral Interface) communication protocol. It is capable of interfacing with a microcontroller to convert analog input signals into digital data for further processing.

.. image:: img/MCP3008.jpg
      :width: 40%

**Sequence of Operation**

A conversion on the MCP3008 begins by setting the CS (chip select) pin low, which activates communication with the device. The microcontroller then sends a 3-byte control stream via the SPI interface to specify the configuration and select the input channel.

The first byte sent contains the start bit and the single/differential selection bit. The next bits indicate which of the 8 channels (CH0–CH7) to read from. Data is shifted into the device on each rising edge of the SPI clock (SCLK), and the conversion result is returned simultaneously.

A short delay is included internally for the selected input channel to settle before conversion begins. The MCP3008 then performs a 10-bit analog-to-digital conversion using a sample-and-hold circuit and a successive approximation register (SAR) comparator.

The conversion result is transmitted back to the microcontroller through the MISO (Master In Slave Out) line. The most significant bit (MSB) of the 10-bit result is sent first, followed by the remaining bits. The microcontroller reads the result over the SPI bus during this time.

After the full 10-bit digital value is shifted out, the MCP3008 completes the cycle and waits for the next command.

* `MCP3008 series Datasheet <https://www.alldatasheet.com/datasheet-pdf/view/304558/MICROCHIP/MCP3008-ISLASHP.html>`_

.. image:: img/MCP3008detail.png

.. **Example**

.. * :ref:`2.1.7_c_mcp3008` (C Project)
.. * :ref:`2.2.1_c_mcp3008` (C Project)
.. * :ref:`2.2.2_c_mcp3008` (C Project)
.. * :ref:`3.1.4_c_mcp3008` (C Project)
.. * :ref:`3.1.5_c_mcp3008` (C Project)
.. * :ref:`3.1.7_c_mcp3008` (C Project)
.. * :ref:`2.1.7_py_mcp3008` (Python Project)
.. * :ref:`2.2.1_py_mcp3008` (Pyhton Project)
.. * :ref:`2.2.2_py_mcp3008` (Pyhton Project)
.. * :ref:`4.1.10_py_mcp3008` (Pyhton Project)
.. * :ref:`4.1.11_py_mcp3008` (Pyhton Project)
.. * :ref:`4.1.13_py_mcp3008` (Pyhton Project)