HardLabs

PREAMP2311

dmsd-lab·AMP8611·PGA2311_3/PGA2311_3.kicad_pcb

PREAMP2311 PCB layout, top view — open source STM32 board by dmsd-lab

About the PREAMP2311 PCB

PREAMP2311 is an open source STM32 PCB design by dmsd-lab, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 234 × 58 mm, with 209 components from 59 distinct parts.

Its main chip is the STM32G070KBT6, from the STM32 family. Other key parts include the OPA1678IDR, CD74HCT4052, LM337LM, PGA2311UA and LM317LIDR. By type, the board carries 85 resistors, 79 capacitors, 17 connectors, 14 ICs, 7 diodes and 2 fuses.

It belongs with the audio designs in this gallery.

From the project

AMP8611 - Integrated Stereo Power Amplifier with a 2-channel input selector, PGA2311 digital volume control and LM3886 power stages

Open hardware project under CERN-OHL-S v2 license

Amplifier combining a 2-channel input selector, PGA2311 digital volume control and 45W per-channel LM3886 output stages.

Full documentation (description pdf, Kicad project schematic and PCB, Gerber files, BOM, STM32 firmware) is available in the repository.

Key Specifications: - Input resistance: 10kΩ; - Nominal input voltage: 0.85Vrms; - Maximum input voltage: 2.5Vrms; - Input Channels isolation: 95dB; - Maximum output power: 2 x 45W RMS (1kHz sinusoidal, 4ohm load); - Bandwidth (-3dB): 20Hz – 90kHz; - Volume control: -80 to +12dB; -…

PREAMP2311, from the project README
From the project README

Main components on the PREAMP2311

OPA1678IDRCD74HCT4052LM337LMPGA2311UALM317LIDRUA78L05AIDRTPS60403DBVWH1602BSN74LVC8T245DWSTM32G070KBT6TLV1117-50IDCLP2985-33DBVSN74LVC2G17DBV

PREAMP2311 bill of materials (BOM)

209 components, 59 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
OPA1678IDR
U201
2
CD74HCT4052
U202, U203
1
LM337LM
U204
1
PGA2311UA
U205
1
LM317LIDR
U206
1
UA78L05AIDR
U207
1
TPS60403DBV
U301
1
WH1602B
U302
1
SN74LVC8T245DW
U303
1
STM32G070KBT6
U304
1
TLV1117-50IDC
U305
1
LP2985-33DBV
U306
1
SN74LVC2G17DBV
U307
1
BC817-40
Q301
3
3
J201, J202, J402
2
2
J203, J204
4
2
J205, J206, J207, J208
1
CONN_01X16
Conn_01x16
J301
3
1
J302, J403, J404
1
CONN_01X02
Conn_01x02
J303
Show 39 more
QtyPartRefs
1
4
J304
1
4
J305
1
1
J401
2
MF-NSMF012-2
F401, F402
1
KLS4-3362P 5.1k
RV301
1
SW_Push
SW301
2
TestPoint
TP201, TP202
2
1N5819
D101, D202
1
BAS40-04
D201
1
LED_GREEN
D301
2
SMAJ15.0A
D401, D402
1
DF01S
D403
4
1.5U
1.5u
C201, C202, C203, C204
25
100N
100n
C205, C206, C208, C209, C211, C212, C221, C225 +17
4
100U
100u
C207, C227, C321, C323
21
10U
10u
C210, C218, C228, C232, C233, C240, C301, C302 +13
5
0
C213, C214, C216, C231, C234
2
220P
220p
C215, C217
2
33P
33p
C219, C220
2
1n
C222, C223
2
33U
33u
C224, C236
11
220U
220u
C315, C405, C406, C407, C408, C409, C410, C411 +3
1
100N
100n
C415
6
10k 1%
R201, R202, R203, R204, R212, R213
18
100
R205, R206, R227, R228, R308, R309, R310, R311 +10
7
0
R207, R222, R223, R226, R230, R304, R325
2
10
R208, R211
2
5.1K
5.1k
R209, R210
18
1k
R214, R215, R224, R233, R323, R326, R327, R331 +10
2
330 1%
R216, R231
2
1k 1%
R217, R232
12
10K
10k
R218, R219, R225, R328, R329, R330, R335, R340 +4
3
220
R220, R221, R343
3
1
R301, R401, R402
2
2.7K
2.7k
R302, R306
1
100
R303
3
2,7k
R305, R322, R324
2
0.33
R307, R342
2
0
R403, R404

PREAMP2311 design files

The KiCad project lives in the dmsd-lab/AMP8611 repository on GitHub; these links point at the commit this page was built from.

PREAMP2311: common questions

What microcontroller does the PREAMP2311 use?

The PREAMP2311 is built around the STM32G070KBT6, from the STM32 family.

How big is the PREAMP2311 PCB?

The PREAMP2311 measures 234 × 58 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PREAMP2311?

209 components, from 59 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the PREAMP2311 design files?

From the dmsd-lab/AMP8611 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the PREAMP2311 design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which dmsd-lab chose for the repository.

Can I test firmware for the PREAMP2311 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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