075c1786af
Verified the receiver from THAT doc 600035 rev05 instead of guessing: - THAT1240 = 0 dB (unity) -- correct as specced; 1243=-3dB, 1246=-6dB would be wrong. - SO-8 pinout 1=Ref 2=In- 3=In+ 4=Vee 5=Sense 6=Vout 7=Vcc 8=NC. My initial SKiDL pins were mostly wrong; corrected. Netlist now matches the datasheet. - KiCad Device:D is pin1=K/pin2=A; my clamp diodes were reversed -- fixed so they actually clamp (D high->cathode to +15, D low->anode to -15). - BOM part numbers had a bogus "W16" suffix; corrected to S08-U (SO-8). Noted INA134/SSM2141 as pin-compatible 2nd sources for long-term availability. ERC 0 errors, netlist 0 errors. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
3.5 KiB
3.5 KiB
| 1 | Ref | Block | Part | Manufacturer | MPN | Qty | Approx_USD_ea | Notes |
|---|---|---|---|---|---|---|---|---|
| 2 | U1 | MCU | RP2350A microcontroller | Raspberry Pi | RP2350A | 1 | 1.10 | QFN-60; mind E9 input-latch erratum (external pulldowns) |
| 3 | U2 | MCU | 16MB QSPI flash | Winbond | W25Q128JVSIQ | 1 | 1.20 | genuine part; firmware wear-levels history.json |
| 4 | Y1 | MCU | 12MHz crystal | Abracon | ABM8-272-12.000MHZ | 1 | 0.30 | +/-30ppm |
| 5 | U3 | Power | 3V3 IO LDO | Diodes Inc | AP2112K-3.3TRG1 | 1 | 0.25 | digital domain |
| 6 | L1 | Power | RP2350 core SMPS inductor | TDK | VLS3012 | 1 | 0.15 | per RP2350 reference |
| 7 | U4 | Power | Dual boost/inverter +/-18V | Texas Instruments | TPS65131RGER | 1 | 2.50 | raw +/-18V from 5V; guarded corner |
| 8 | U5 | Power | Ultra-low-noise +15V LDO | Texas Instruments | TPS7A4901DGNR | 1 | 1.80 | post-regulates +18 to clean +15 |
| 9 | U6 | Power | Ultra-low-noise -15V LDO | Texas Instruments | TPS7A3001DGNR | 1 | 1.90 | post-regulates -18 to clean -15 |
| 10 | J1 | Power/USB | USB-C receptacle (TH-anchored) | GCT | USB4085-GF-A | 1 | 0.60 | through-hole anchor tabs for strain |
| 11 | U7 | Power/USB | USB ESD protection array | STMicroelectronics | USBLC6-2SC6 | 1 | 0.30 | D+/D-/CC/VBUS |
| 12 | FL1 | Power/USB | USB common-mode choke | Wurth | 744232090 | 1 | 0.35 | data-pair EMI |
| 13 | U8 | Click | I2S audio DAC | Texas Instruments | PCM5102APWR | 1 | 2.20 | Burr-Brown; reliability-first |
| 14 | X1 | Click | Low-jitter audio oscillator | Abracon | ASEM1-24.576MHZ-LR-T | 1 | 1.40 | dedicated MCLK; not PIO-jittered |
| 15 | U9 | Audio-in | Balanced line receiver | THAT Corp | THAT1240S08-U | 1 | 3.20 | 0dB unity; pinout verified doc600035 rev05; 2nd-src INA134/SSM2141 |
| 16 | U10 | Audio-in | JFET Hi-Z instrument buffer | Texas Instruments | OPA1641AID | 1 | 1.60 | >=1Mohm DI buffer + gain |
| 17 | U11 | Audio-mix | Dual audio op-amp (sum/filter) | Texas Instruments | OPA1612AIDR | 1 | 2.40 | signal-path low noise |
| 18 | U12 | Audio-out | Balanced line driver | THAT Corp | THAT1646S08-U | 1 | 3.30 | near-zero source; 47ohm build-out per leg; pinout TBV at output stage |
| 19 | RV1 | Audio-out | Output level cal trimmer 25-turn | Bourns | 3296W-1-103LF | 1 | 0.70 | factory-set DAC FS -> +4dBu |
| 20 | U13 | Indicator | Dual comparator (sig/clip) | Texas Instruments | LM393DR | 1 | 0.15 | peak-detect -> RP2350 GPIO + LED lines |
| 21 | K1 | Audio-in | Signal relay line/inst (DPDT gold) | Panasonic | TQ2SA-5V | 1 | 1.30 | sealed gold bifurcated contacts |
| 22 | K2 | Audio-out | Mute relay (fail-safe DPDT gold) | Panasonic | TQ2SA-5V | 1 | 1.30 | de-energized=muted |
| 23 | K3 | Audio-out | Ground-lift relay (gold) | Panasonic | TQ2SA-5V | 1 | 1.30 | series with face panel switch; soft-lift 100R||10nF |
| 24 | U14 | Control | Relay driver array | Texas Instruments | ULN2003ADR | 1 | 0.20 | drives K1-K3 with flyback |
| 25 | U15 | RTC | Real-time clock (integrated xtal) | Micro Crystal | RV-8803-C7 | 1 | 1.50 | I2C on touch bus; drift irrelevant |
| 26 | BT1 | RTC | CR2032 holder (socketed) | Keystone | 1066 | 1 | 0.30 | user-replaceable |
| 27 | U16 | MIDI(DNP) | Opto-isolator MIDI IN | Vishay | H11L1M | 1 | 0.55 | DNP populate-option |
| 28 | U17 | MIDI(DNP) | Hex Schmitt buffer MIDI OUT/THRU | Nexperia | 74LVC14APW | 1 | 0.20 | DNP populate-option |
| 29 | U18 | Speaker(DNP) | Class-D mono amp | Diodes Inc | PAM8302AASCR | 1 | 0.35 | DNP monitor option per face |
| 30 | J2 | Interconnect | Digital ribbon header 2x13 shrouded keyed | Wurth | 61303421821 | 1 | 0.45 | Pico-pinout-compatible |
| 31 | J3 | Interconnect | Analog audio header 2x5 shrouded keyed | Wurth | 61301021821 | 1 | 0.35 | twisted/shielded; away from digital |
| 32 | J4 | Interconnect | MIDI header 1x6 | Wurth | 61300611121 | 1 | 0.20 | used only if DNP MIDI populated |
| 33 | J5 | Debug | SWD Cortex-Debug 2x5 1.27mm | Samtec | FTSH-105-01-L-DV-K | 1 | 0.50 | service header |
| 34 | D-arr | ESD | Interconnect ESD clamp arrays | Texas Instruments | TPD2E2U06DCKR | 3 | 0.10 | on user-touchable lines |
| 35 | PASS | Passives | Film caps / 0.1% thin-film R / clamp diodes / ferrites | various | various | 1 | 4.00 | WIMA film signal caps; Panasonic ERA 0.1%; no electrolytics in signal path |
| 36 | PCB | Fabrication | 4-layer PCB ENIG finish | JLCPCB/PCBWay | custom | 1 | 3.00 | gold finish; qty-dependent |