HardLabs

PLL

OpenSiPM·PLL·PLL_AD9544/pll_ad9544.kicad_pcb

PLL PCB layout, top view — open source Microchip SAM board by OpenSiPM

About the PLL PCB

PLL is an open source Microchip SAM PCB design by OpenSiPM, published on GitHub. It is a 4-layer board measuring 74.8 × 44.5 mm, with 73 components from 26 distinct parts.

Its main chip is the ATSAMD21E18A-AFT, from the Microchip SAM family. Other key parts include the MIC5317-3.3YM5-TR, AZ1117CH-1.8TRG1, 24AA16-I/SN, AD9544BCPZ and SN65LVDS2DBVR. By type, the board carries 32 capacitors, 26 resistors, 7 ICs, 5 connectors and 2 diodes.

From the project

Resonant scanning is essential for high-speed and in vivo laser scanning microscopy. However, resonant scanners are susceptible to jitter due to a mismatch between the mirror's mechanical oscillation and the data acquisition system's pixel sampling clock. If the digitizer samples

Resonant scanning is essential for high-speed and in vivo laser scanning microscopy. However, resonant scanners are susceptible to jitter due to a mismatch between the mirror's mechanical oscillation and the data acquisition system's pixel sampling clock. If the digitizer samples at a fixed rate, the pixels on one line land in slightly different positions than on the next and the raw data appears shifted from line to line.

PLL, from the project README
From the project README

Main components on the PLL

ATSAMD21E18A-AFTMIC5317-3.3YM5-TRAZ1117CH-1.8TRG124AA16-I/SNAD9544BCPZSN65LVDS2DBVR

PLL bill of materials (BOM)

73 components, 26 distinct parts.

QtyPartRefs
1
ATSAMD21E18A-AFT
ATSAMD21E18A-MUT
IC1
1
MIC5317-3.3YM5-TR
U1
1
AZ1117CH-1.8TRG1
U2
1
24AA16-I/SN
U3
1
AD9544BCPZ
U4
2
SN65LVDS2DBVR
U5, U6
1
USB1130-15-A_REVA
J1
3
Conn_Coaxial
J3, J4, J5
1
Conn_01x04
J6
1
NX2016SA-52MHZ-EXS00A-CS07103
XTAL1
1
POWER
D1
1
PLL LOCK
D2
24
1uF
C1, C2, C5, C6, C7, C8, C9, C10 +16
2
22uF
C3, C4
2
15pF
C11, C12
2
3.9nF
C14, C16
2
DNP
C30, C31
4
0
R1, R23, R24, R25
5
5.1k
R2, R13, R14, R20, R21
2
R_Small_US
R3, R4
Show 6 more
QtyPartRefs
8
50
R5, R6, R8, R9, R10, R22, R26, R27
2
8.5
R7, R15
1
750
R11
1
141.9
R16
2
100k
R17, R18
1
68
R19

PLL design files

The KiCad project lives in the OpenSiPM/PLL repository on GitHub; these links point at the commit this page was built from.

PLL: common questions

What microcontroller does the PLL use?

The PLL is built around the ATSAMD21E18A-AFT, from the Microchip SAM family.

How big is the PLL PCB?

The PLL measures 74.8 × 44.5 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the PLL?

73 components, from 26 distinct parts. The full bill of materials is listed on this page.

Where can I download the PLL design files?

From the OpenSiPM/PLL repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the PLL design in my own project?

The repository has no license, so all rights stay with OpenSiPM. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the PLL without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Microchip SAM firmware against it before you order a PCB.

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