2 layers40.3 × 128.5 mm
2 layers100 × 100 mm
Amplifier
PatrickJohnDavies/Hydrophone8- Size
- 100 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 107
- Nets
- 67
- Pads
- 268
- Tracks, vias
- 328, 65
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 29 May 2023
- Updated
- 13 May 2025
Overview
Amplifier is an open-source printed circuit board by PatrickJohnDavies, from the PatrickJohnDavies/Hydrophone repository on GitHub. It is a 2-layer board of 100 × 100 mm with 107 parts on 67 nets, routed with 328 tracks and 65 vias.
It is built around the AD8421ARZ, OPA1688ID and BAV199, with the SSM3J338R,LF among its other parts. Its parts include 41 capacitors, 29 resistors, 7 connectors, 6 diodes and 4 ICs. It belongs with the audio and music boards of this library.
Main components
4
AD8421ARZ
SOIC-8-18V~-2.5V、2.5V~18V -40℃~+85℃ 0.02% 1 10MHz 1V/V~10000V/V 1nA 1pA/℃ 2.3mA 2nA 3.2nV/√Hz@1kHz 35V/us 400nV/℃ 5V~36V 60uV 65mA 700ns 86dB 90dB External resistor gain、Overvoltage protection、Integrated ADC driver SOIC-8 Instrumentation Amplifiers ROHSAnalog DevicesInstrumentation OpAmps
OPA1688ID
SOP-8-18V~-2.25V、2.25V~18V -40℃~+85℃ 0.00005% 1.6mA SOP-8 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
BAV199
SOT-231 Pair Series Connection 1.25V@150mA 160mA 4A 5nA@75V 85V SOT-23 Diodes - General Purpose ROHSNexperiaDiodes - General Purpose
SSM3J338R,LF
SOT-23F1 P-Channel 1.4nF 12V 15.9mΩ@4.5V 19.5nC@4.5V 1V 1W 225pF 250pF 6A P-Channel SOT-23F MOSFETs ROHSToshibaMOSFETs
README
Readme.mdIntro
This project describes the construction of a stereo audio hydrophone system by building upon the hydrophone design from Sound Sleuth. Major parts of the system are:
- Hydrophone with preampifier
- Amplifier and headphone driver
- Stand for underwater stereo sound seperation
Release Notes:
- V0
- Bug. Instrumentation amplifier (U1, U2) footprint is incorrent. Therefore switched to AD620. Instrumentation amplifiers with this pinout seem have lower bandwidth.
- Bug. Q2 has its drain and source reversed.
Parts
107| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 0.1u | Capacitor_SMD:C_0603_1608Metric | C13, C14, C15, C16, C23, C24, C32, C34 |
| 8 | TestPoint | TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8 |
| 7 | 47u | Capacitor_SMD:CP_Elec_10x10 | C1, C2, C3, C4, C5, C6, C26 |
| 6 | 0 | Resistor_SMD:R_0603_1608Metric | R14, R15, R20, R21, R22, R23 |
| 6 | 10u | Capacitor_SMD:C_1206_3216Metric | C17, C18, C19, C20, C27, C36 |
| 5 | 1n | Capacitor_SMD:C_0603_1608Metric | C7, C9, C10, C12, C30 |
| 5 | 2.2k | Resistor_SMD:R_0603_1608Metric | R5, R6, R7, R8, R9 |
| 4 | 33 | Resistor_SMD:R_0603_1608Metric | R10, R11, R12, R13 |
| 4 | 6.8k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4 |
| 4 | BAV199 | Package_TO_SOT_SMD:SOT-23 | D1, D2, D3, D4 |
| 4 | Conn_01x04 | Connector_JST:JST_PH_B8B-PH-K_1x08_P2.00mm_Vertical | J1, J2, J4, J7 |
| 4 | DNP | Resistor_SMD:R_0603_1608Metric | R16, R17, R18, R19 |
| 4 | DNP | Capacitor_SMD:C_0603_1608Metric | C21, C22, C40, C41 |
| 4 | FerriteBead | Resistor_SMD:R_0603_1608Metric | FB1, FB2, FB3, FB4 |
| 3 | 10n | Capacitor_SMD:C_0603_1608Metric | C8, C11, C39 |
| 3 | 1u | Capacitor_SMD:C_0805_2012Metric | C28, C33, C38 |
| 2 | 22k | Resistor_SMD:R_0603_1608Metric | R25, R26 |
| 2 | 9V | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | BT1, BT2 |
| 2 | AD8421 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1, U2 |
| 2 | Conn_01x02 | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J5, J6 |
| 2 | SSM3J338R,LF | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 1 | 0.22u | Capacitor_SMD:C_0603_1608Metric | C29 |
| 1 | 0.47u | Resistor_SMD:R_0805_2012Metric | L1 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R24 |
| 1 | 100u | Capacitor_SMD:CP_Elec_10x10 | C37 |
| 1 | 10p | Capacitor_SMD:C_0603_1608Metric | C31 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric | R27 |
| 1 | 1N4148 | Diode_SMD:D_SOD-123 | D6 |
| 1 | 34.8k | Resistor_SMD:R_0603_1608Metric | R28 |
| 1 | 4.7p | Capacitor_SMD:C_0603_1608Metric | C35 |
| 1 | 4.7u | Capacitor_SMD:C_1206_3216Metric | C25 |
| 1 | 499 | Resistor_SMD:R_0603_1608Metric | R29 |
| 1 | 6.8u | pd_footprints:L_Wuerth_74437324068 | L2 |
| 1 | Conn_01x03 | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | J3 |
| 1 | DFLS260-7 | Diode_SMD:D_PowerDI-123 | D5 |
| 1 | LT8362 | Package_DFN_QFN:DFN-10-1EP_3x3mm_P0.5mm_EP1.65x2.38mm | U4 |
| 1 | OPA1688 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | SBCP56-16T1G | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | Q3 |
The 106 most common of 107 parts.
Questions
How big is the Amplifier PCB?
It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Amplifier use?
107 parts, built around the AD8421ARZ, OPA1688ID, BAV199 and SSM3J338R,LF. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Amplifier KiCad files?
From the PatrickJohnDavies/Hydrophone repository on GitHub, at the commit this page was made from: the board is hardware/amplifier/amplifier.kicad_pcb and its schematic hardware/amplifier/amplifier.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Amplifier design in my own project?
Its repository states no licence, so its author keeps all rights: ask PatrickJohnDavies before reusing the design.
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