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Cpl adc board

matham·cpl_adc_board·Layout/CPL ADC Board rev 1.kicad_pcb

Cpl adc board layout, top view — open source AVR/Arduino board by matham

About the Cpl adc board

Cpl adc board is an open source AVR/Arduino PCB design by matham, published on GitHub. It is a 4-layer board measuring 101.6 × 50.8 mm, with 74 components from 35 distinct parts.

Its main chip is the ATMEGA1284P, from the AVR/Arduino family. Other key parts include the AD780, AD7732, 74HC2G17GW, 7805_SMD and MAX13089E. By type, the board carries 41 capacitors, 8 ICs, 8 diodes, 7 connectors, 6 resistors and 2 crystals.

From the project

The PCB design of the CPL ADC board

The CPL ADC Board is an AD7732 based fully differential two-channel, 15.075 kHz, 24-bit, +/-10V analog to digital converter.

Its digital interface is composed of an 8-bit wide data bus and a clock line. The data is clocked out asynchronously with a maximum rate of 1MHz. Once programmed, at runtime one can select which channels are active as well as the sampling frequency. One can also select at runtime how many of the 8 data bus bits are used for transferring data ot the host (the minimum is 2 bits) if the host doesn't have enough free lines. At the largest sampling rates with both channels…

Main components on the Cpl adc board

AD780AD773274HC2G17GW7805_SMDATMEGA1284PMAX13089E

Cpl adc board bill of materials (BOM)

74 components, 35 distinct parts.

QtyPartRefs
1
AD780
U1
1
AD7732
U2
3
74HC2G17GW
U3, U4, U5
1
7805_SMD
U6
1
ATMEGA1284P
U7
1
MAX13089E
U8
1
6MHz
X1
1
20MHz
X2
2
ACJM-NH35
J1, J2
1
CONN_2
J3
1
CONN_9X2_
J5
1
Protocol
J6
1
BAUD
J7
1
DB9_SHIELD
J8
1
P***
1PIN
1
CONN_1
W1
1
LED
D1
6
TVS
D2, D3, D4, D5, D6, D7
1
TVS
D8
9
1uF
C1, C4, C8, C11, C13, C19, C22, C24 +1
Show 15 more
QtyPartRefs
1
1nF
C2
1
0.47uF
C3
11
10uF
C5, C9, C10, C12, C14, C20, C23, C25 +3
2
30pF
C6, C7
2
0.33uF
C15, C16
2
6pF
C17, C18
10
0.1uF
C21, C28, C29, C30, C31, C32, C33, C34 +2
1
100nF
C38
1
47nF
C39
1
10uF
C41
2
4.7k
R1, R3
1
300
R2
1
1M
R4
1
100
R5
1
120
R6

Cpl adc board design files

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

Cpl adc board: common questions

What microcontroller does the Cpl adc board use?

The Cpl adc board is built around the ATMEGA1284P, from the AVR/Arduino family.

How big is the Cpl adc board?

The Cpl adc board measures 101.6 × 50.8 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Cpl adc board?

74 components, from 35 distinct parts. The full bill of materials is listed on this page.

Where can I download the Cpl adc board design files?

From the matham/cpl_adc_board repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Cpl adc board design in my own project?

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

Can I test firmware for the Cpl adc board without the hardware?

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

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