Difference between revisions of "Si5351 Oscillator Breakout Board"

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(Created page with "File:Si5351_001_720px.jpg == Features === File:VFO3.PNG * I2C Daisy-chain connector * 3 outputs * Heat shrinked assembly with cables ==== Measurements ==== * 10 M...")
 
 
(26 intermediate revisions by the same user not shown)
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[[File:Si5351_001_720px.jpg]]
 
[[File:Si5351_001_720px.jpg]]
  
−
== Features ===
+
== Features ==
 +
 
 +
* I2C Daisy-chain connector
 +
* 3 outputs
 +
* 25 or 27 MHz crystal (Rev 1)
 +
* 27 MHz TCXO (Rev 3)
 +
* Can be used as a heat shrinked assembly with cables
 +
 
 +
== Pinout ==
  
 
[[File:VFO3.PNG]]
 
[[File:VFO3.PNG]]
  
−
* I2C Daisy-chain connector
+
=== J1 - Daisy-chained I2C ===
−
* 3 outputs
+
 
−
* Heat shrinked assembly with cables
+
# SCL
 +
# SDA
 +
# +3.3V
 +
# GND
 +
 
 +
=== J2 - VFO Outputs ===
 +
 
 +
* VFO out / GND Pairs
 +
 
 +
# VFO0
 +
# VFO1
 +
# VFO2
 +
 
 +
== Test Setup ==
 +
 
 +
=== Test Hardware ===
 +
 
 +
* [[Arduino Pro Mini]]
 +
** 3.3V/8MHz
 +
* Rotary Encoder/Breakout Board
 +
* 128x32 OLED
 +
* Breadboard Power Supply
 +
** 3.3V operation
 +
 
 +
=== Test Software ===
 +
 
 +
* [https://github.com/land-boards/lb-Arduino-Code/tree/master/LBCards/I2C-VFO3 I2C-VFO3 Arduino Code on GitHub]
  
−
==== Measurements ====
+
== Measurements ==
  
 
* 10 MHz FFT
 
* 10 MHz FFT
Line 15: Line 49:
  
 
[[File:10MHz_VFO_FFT-01.png]]
 
[[File:10MHz_VFO_FFT-01.png]]
 +
 +
== Revision History ==
 +
 +
=== Rev 3 ===
 +
 +
* TXCO
 +
* Fixed solder mask clearance
 +
* Tested
 +
** Correction factor less than +10 Hz at 10 MHz
 +
*** 1ppm (spec 2.5ppm)
 +
 +
=== Rev 2 ===
 +
 +
* TXCO instead of crystal
 +
* Insufficient solder mask (too big a clearance)
 +
 +
=== Rev 1 ===
 +
 +
* Used crystal
 +
 +
== Assembly Sheet - Rev 3 ==
 +
 +
[[File:I2C-VFO3-CAD-Rev 2_Front_Back.png]]
 +
 +
{| class="wikitable"
 +
! Qty
 +
! Value
 +
! RefDes
 +
!
 +
! Qty
 +
! Value
 +
! RefDes
 +
|-
 +
| 2
 +
| 0.1uF
 +
| C1,C2
 +
|
 +
| 1
 +
| Header, Right Angle, 2x3
 +
| J2
 +
|-
 +
| 2
 +
| 2.2K
 +
| R1,R2
 +
|
 +
| 1
 +
| Header, Right Angle, 2x4
 +
| J1
 +
|-
 +
| 1
 +
| TCXO, 27 MHz [https://www.mouser.com/ProductDetail/559-FOX924B-27 FOX924B-27]
 +
| U2
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
| 1
 +
| [https://www.mouser.com/Semiconductors/Clock-Timer-ICs/Clock-Generators-Support-Products/Si5351-Series/_/N-4k38u?P=1y963j3Z1z0z33o&Keyword=Si5351A&FS=True Si5351A]
 +
| U1
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|}

Latest revision as of 13:04, 1 November 2021

Si5351 001 720px.jpg

Features

  • I2C Daisy-chain connector
  • 3 outputs
  • 25 or 27 MHz crystal (Rev 1)
  • 27 MHz TCXO (Rev 3)
  • Can be used as a heat shrinked assembly with cables

Pinout

VFO3.PNG

J1 - Daisy-chained I2C

  1. SCL
  2. SDA
  3. +3.3V
  4. GND

J2 - VFO Outputs

  • VFO out / GND Pairs
  1. VFO0
  2. VFO1
  3. VFO2

Test Setup

Test Hardware

  • Arduino Pro Mini
    • 3.3V/8MHz
  • Rotary Encoder/Breakout Board
  • 128x32 OLED
  • Breadboard Power Supply
    • 3.3V operation

Test Software

Measurements

  • 10 MHz FFT
    • Square wave has high odd harmonic content

10MHz VFO FFT-01.png

Revision History

Rev 3

  • TXCO
  • Fixed solder mask clearance
  • Tested
    • Correction factor less than +10 Hz at 10 MHz
      • 1ppm (spec 2.5ppm)

Rev 2

  • TXCO instead of crystal
  • Insufficient solder mask (too big a clearance)

Rev 1

  • Used crystal

Assembly Sheet - Rev 3

I2C-VFO3-CAD-Rev 2 Front Back.png

Qty Value RefDes Qty Value RefDes
2 0.1uF C1,C2 1 Header, Right Angle, 2x3 J2
2 2.2K R1,R2 1 Header, Right Angle, 2x4 J1
1 TCXO, 27 MHz FOX924B-27 U2
1 Si5351A U1
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