[PC-1555] - Opta MTBF information (datasheet) (#1743)

* Content update (MTBF table initial commit)

* Content update (Andrea's review)

* Content update (MTBF table information)

* Content update (MTBF table information)

* Small MTBF updates

* Content update (Julián's update)

* Content update (linter fix)

* Content update (MTBF table information update)

---------

Co-authored-by: José Antonio Bagur Nájera <josea.bagur@gmail.com>
Co-authored-by: jcarolinares <jcarolinares@gmail.com>

Author: 3 people

content/hardware/07.opta/opta-family/opta/datasheet/datasheet.md

@@ -429,11 +429,11 @@ Arduino Opta® is designed for industrial standard machinery control as a PLC wi
 ## Ratings
 ### Recommended Operating Conditions
 
-| Description                                       | Value                     |
-|---------------------------------------------------|---------------------------|
-| Temperature Operating Range                       | -20...50 °C                |
-| Protection degree rating                          | IP20                      |
-| Pollution degree                                  | 2 conforming to IEC 61010 |
+| Description                 | Value                     |
+| --------------------------- | ------------------------- |
+| Temperature Operating Range | -20...50 °C               |
+| Protection degree rating    | IP20                      |
+| Pollution degree            | 2 conforming to IEC 61010 |
 
 ### Power Specification
 
@@ -457,7 +457,7 @@ Arduino Opta® is designed for industrial standard machinery control as a PLC wi
 | 3A   | Power Supply Terminals 12...24 VDC                                  | 3H   | Ethernet Port Status LEDs                                           |
 | 3B   | I1...I8 digital/analog input terminals (0-10V) configurable via IDE | 3I   | Label Holder                                                        |
 | 3C   | Reset Button                                                        | 3J   | RS-485 terminal block (for Modbus RTU or proprietary communication) |
-| 3D   | User Programmable button                                            | 3K   | USB-C® for programming and data logging                                |
+| 3D   | User Programmable button                                            | 3K   | USB-C® for programming and data logging                             |
 | 3E   | Status LEDs 1...4 (User Programmable)                               | 3M   | Ethernet port                                                       |
 | 3F   | Relay Output Terminals 1...4, NO contact (SPST) 10A 250 VAC         | 3N   | Port for communication and connection of auxiliary modules          |
 | 3G   | Functional Earth                                                    |      |                                                                     |
@@ -539,6 +539,18 @@ Now that you have gone through the basics of what you can do with the device, yo
 
 <div style="page-break-after: always;"></div>
 
+## Mean Time Between Failure (MTBF)
+
+MTBF, which stands for Mean Time Between Failure, is calculated according to statistical device failures and indicates the reliability of a device.
+
+The MTBF figure (in hours/years) for each Arduino Opta® variant can be found in the table below. The MTBF figure was calculated according to the MIL-HDBK-217F parts count method.
+
+|  **Standard** | **All Opta® Variants** | **Environmental Conditions** |
+|:-------------:|:----------------------:|:----------------------------:|
+| MIL-HDBK-217F |    766205 h/87 years   |             25 ºC            |
+
+**Important note**: MTBF is the statistical representation of the likelihood of a unit failing and _does not necessarily represent a product's life_.
+
 ## Mechanical Information
 ### Product Dimensions
 ![Arduino Opta® Outline. Dimensions are in mm](assets/opta_mechanical.svg)
@@ -750,8 +762,9 @@ Hereby, Arduino S.r.l. declares that this product is in compliance with essentia
 
 ## Revision History
 
-| Date       | **Revision** | **Changes**        |
-|------------|--------------|------------------- |
-| 16/05/2023 | 3            | Legal updates      |
-| 13/04/2023 | 2            | Tech Specs Updates |
-| 02/03/2023 | 1            | First Release      |
+| Date       | **Revision** |     **Changes**    |
+|------------|:------------:|:------------------:|
+| 07/02/2023 |       4      |  MTBF information  |
+| 16/05/2023 |       3      |    Legal updates   |
+| 13/04/2023 |       2      | Tech Specs Updates |
+| 02/03/2023 |       1      |    First Release   |