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Phono adc eval

birdybro·FPGA_Amp·hardware/kicad/phono_adc_eval_rev_a/phono_adc_eval.kicad_pcb

Phono adc eval PCB layout, top view — open source board by birdybro
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About the Phono adc eval PCB

Phono adc eval is an open source PCB design by birdybro, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 130 × 90 mm, with 119 components from 49 distinct parts.

Other key parts include the TPS7A39DSCR, TPS7A2050PDBVR, TPS7A2033PDBVR, OPA1656IDR and OPA1632DR. By type, the board carries 48 capacitors, 44 resistors, 8 ICs, 6 diodes, 5 connectors and 4 transistors.

It belongs with the audio designs in this gallery.

From the project

FPGA based audiophile phono preamp and amp integrated unit idea. WIP

This directory contains a routed four-layer KiCad 10 evaluation board for the flat-gain Architecture A input path. It is a concrete bench prototype, not a production fabrication release and not evidence of measured performance.

The board is 130 x 90 mm with F.Cu / continuous L2 GND / L3 POWER_SIG / B.Cu. Cartridge entry, relay loading, flat gain, differential drivers, ADC, local post-regulation, and digital headers are physically partitioned. The RCA and turntable-ground connectors are EVT harness/terminal choices; production parts remain enclosure decisions.

Main components on the Phono adc eval

TPS7A39DSCRTPS7A2050PDBVRTPS7A2033PDBVROPA1656IDROPA1632DRPCM4202DBR

Phono adc eval bill of materials (BOM)

119 components, 49 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TPS7A39DSCR
U1
1
TPS7A2050PDBVR
U2
1
TPS7A2033PDBVR
U3
2
OPA1656IDR
U4, U8
2
OPA1632DR
U5, U6
1
PCM4202DBR
U7
4
MMBT3904
Q1, Q2, Q3, Q4
1
ISOLATED_PANEL_RCA_HARNESS
J1
1
TURNTABLE_GROUND_POST
J2
1
ADC_AUDIO
J3
1
POWER_INPUT
J4
1
ADC_CONTROL
J5
1
G6K-2F-Y-5V_GAIN_BANK
K1
1
G6K-2F-Y-5V_GAIN_RANGE
K2
1
G6K-2F-Y-5V_CAP47
K3
1
G6K-2F-Y-5V_CAP100
K4
2
PESD5V0X1BCL_EVT
D1, D2
4
1N4148W
D3, D4, D5, D6
2
47pF_C0G_1%
C1, C2
2
100pF_C0G_1%
C3, C4
Show 29 more
QtyPartRefs
2
DNP_22PF_C0G_RF
DNP_22pF_C0G_RF
C5, C6
4
1NF_C0G
1nF_C0G
C20, C21, C30, C31
2
2.7NF_C0G
2.7nF_C0G
C22, C32
4
100PF_C0G
100pF_C0G
C23, C24, C33, C34
4
33UF_LOW_ESR
33uF_LOW_ESR
C40, C42, C46, C48
10
100NF_X7R
100nF_X7R
C41, C43, C44, C45, C47, C49, C71, C72 +2
3
10NF_X7R
10nF_X7R
C60, C61, C62
6
10UF_25V_X7R
10uF_25V_X7R
C63, C64, C65, C66, C79, C80
4
1UF_X7R
1uF_X7R
C67, C68, C69, C70
4
100NF_X7R
100nF_X7R
C73, C74, C75, C76
1
DNP_100NF_CHASSIS
DNP_100nF_CHASSIS
C81
2
100R_0.1%
R1, R2
2
47.5k_0.1%_25ppm
R3, R4
2
19.1k_0.1%
R5, R6
2
1.00k_0.1%
R7, R8
2
2.12k_0.1%
R9, R10
2
492R_0.1%
R11, R12
8
316R_0.1%
R20, R21, R22, R23, R30, R31, R32, R33
4
40.2R_0.1%
R24, R25, R34, R35
1
22R
R40
3
33R
R41, R42, R43
5
100K
100k
R44, R55, R56, R57, R58
1
10K
10k
R45
4
2.2K
2.2k
R51, R52, R53, R54
1
90.9k_0.1%
R60
2
10.0k_0.1%
R61, R63
1
100k_0.1%
R62
1
0R_CHASSIS_BOND
R70
1
DNP_10R_CHASSIS
R71

Phono adc eval design files

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

Phono adc eval: common questions

How big is the Phono adc eval PCB?

The Phono adc eval measures 130 × 90 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Phono adc eval?

119 components, from 49 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 Phono adc eval design files?

From the birdybro/FPGA_Amp 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 Phono adc eval design in my own project?

Yes, under the terms of its GPL-3.0 license, which birdybro chose for the repository.

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