Schematic review - v1.1

[kaolpr]

Use this issue for small corrections required for schematics. List them as tasks list. If a more complex problem is noticed feel free to create a new issue. Please mention created issues resulting from the review in this issue.

[skuchars]

• power sequencing #2 - it has already been done in first version, now I only organized schematic SiLPA_CPCIS_Con_P1_P6
• IC18 Reference Voltage for MAX1329 is damaged #5
• Delay startup circuit #6
• IC25 decoupling capacitor  #7 - these capacitors were placed wrongly on board, but they exist on schematic, so that is only a layout issue
• SERVMOD #8
• P3V3_MP no protection between IC converter and EEM #10 - added diode as @kaolpr suggested
• PGOOD LED not working #11
• Incorrect IC12 gain annotation #12

[skuchars]

• Comparator input pins swapped #13
• Wrong pins assigned to I2C2 #14
• USB data pins swapped #16
• Better control over interlocks #17
• Change user interface #18
• Remove IC22 EEPROM #20
• RF channel characteristics #21
• SMA connectors #26

[skuchars]

• Output amplifier has 75 ohm not 50 char. impedance #29

[gkasprow]

@skuchars whare are you with layout?

[skuchars]

I have been doing it bit by bit for some time, but I can maximize effort now so hopefully I could finish most of the issues in few days time; then I will make a commit. But still any of my schematic changes weren't actually approved so it would be great if that can happen soon, for example by @kaolpr.

[skuchars]

@gkasprow

[gkasprow]

pls make sure you follow the newest DIOT template
sinara-hw/DIOT-Template#1

[skuchars]

Questions:

1. In sequencing circuit posted in Sinara@DIOT Power Sequencing meta#91 (comment) there are absent transistors T3 and T4, but they do appear in the newest DIOT template. Which version should I implement, probably the newer one?
2. In LVDS schematic IC32 is fully used (all sub-parts, A-D), was this intentional or I can drop this design and copy new DIOT template (only A B sub-parts in use)?

[gkasprow]

1. yes
2. it's better to use all parts, this lowers RDSon

[gkasprow]

2. I fixed that in the template