# 8-Channel USB Audio Line Input Board ## Description 8-channel USB Audio Class 2.0 line-input interface using AK5558 ADC and XMOS XU208 USB bridge ## Project Details - **Owner:** saiko1992 - **Created:** 7/1/2026 - **Last Updated:** 7/1/2026 - **Visibility:** Public - **Operating Voltage:** 5V - **Domain:** Audio - **Connectivity:** USB-C - **Power Requirements:** USB powered ## Key Components ### D1 — [USBLC6-2SC6](https://www.flux.ai/lcsc/usblc6-2sc6~2e9x.md) - Part Type: ESD Protection Devices - Manufacturer Part Number: USBLC6-2SC6 - Operating Temperature: -55°C ~ 125°C (TJ) - Symbol Style: parametric-v1 - Role: USB ESD protection - Datasheet URL: https://www.lcsc.com/datasheet/C2687116.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNRTlhdUVdURFlXXzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Power: 150W - Breakdown Voltage: 6V - JLCPCB Part Class: Extended Part - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL - Maximum Clamping Voltage: 17V - Peak Pulse Current: 5A - Manufacturer Name: UMW(友台半导体) - LCSC Part Number: C2687116 **Pins:** - GND [pin 2] - I/O1 [pin 1] - I/O1 [pin 6] - I/O2 [pin 3] - I/O2 [pin 4] - VBUS [pin 5] ### J1 — [UJ20-C-H-G-SMT-2-P16-TR](https://www.flux.ai/adrian95/uj20-c-h-g-smt-2-p16-tr~v05.md) - Manufacturer Part Number: UJ20-C-H-G-SMT-2-P16-TR - Mount: Surface Mount - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Datasheet URL: https://www.sameskydevices.com/product/resource/uj20-c-h-g-smt-2-p16-tr.pdf - Manufacturer Name: Same Sky (Formerly CUI Devices) - Symbol Style: parametric-v1 - Role: USB-C upstream connector **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin A1_B12] - GND__1 [pin B1_A12] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD [pin SH1] - SHIELD__1 [pin SH2] - SHIELD__2 [pin SH3] - SHIELD__3 [pin SH4] - VBUS [pin A4_B9] - VBUS__1 [pin B4_A9] ### J10 — [FTSH-105-01-F-DV-K-P-TR](https://www.flux.ai/adrian95/ftsh-105-01-f-dv-k-p-tr~f70.md) - Datasheet URL: http://suddendocs.samtec.com/prints/ftsh-1xx-xx-xxx-dv-xxx-xxx-mkt.pdf - Connector Type: 2x5 1.27mm SMT header - Part Type: Connectors - Role: XMOS xTAG/JTAG debug header - Manufacturer Name: Samtec - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: FTSH-105-01-F-DV-K-P-TR **Pins:** - 1 [pin 1] - 10 [pin 10] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] - 9 [pin 9] ### J2 — [SJ-3523-SMT-TR](https://www.flux.ai/vasy_skral/sj-3523-smt-tr~6n4.md) - Datasheet URL: https://www.cuidevices.com/product/resource/sj-352x-smt.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Part Number: SJ-3523-SMT-TR - Role: Line input jack - Manufacturer Name: CUI Devices **Pins:** - R [pin R] - S [pin S] - T [pin T] ### J3 — [SJ-3523-SMT-TR](https://www.flux.ai/vasy_skral/sj-3523-smt-tr~6n4.md) - Datasheet URL: https://www.cuidevices.com/product/resource/sj-352x-smt.pdf - Manufacturer Name: CUI Devices - Part Type: Connector - Manufacturer Part Number: SJ-3523-SMT-TR - Role: Line input jack - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - R [pin R] - S [pin S] - T [pin T] ### J4 — [SJ-3523-SMT-TR](https://www.flux.ai/vasy_skral/sj-3523-smt-tr~6n4.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Part Number: SJ-3523-SMT-TR - Manufacturer Name: CUI Devices - Role: Line input jack - Datasheet URL: https://www.cuidevices.com/product/resource/sj-352x-smt.pdf **Pins:** - R [pin R] - S [pin S] - T [pin T] ### J5 — [SJ-3523-SMT-TR](https://www.flux.ai/vasy_skral/sj-3523-smt-tr~6n4.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SJ-3523-SMT-TR - Manufacturer Name: CUI Devices - Role: Line input jack - Datasheet URL: https://www.cuidevices.com/product/resource/sj-352x-smt.pdf **Pins:** - R [pin R] - S [pin S] - T [pin T] ### J6 — [SJ-3523-SMT-TR](https://www.flux.ai/vasy_skral/sj-3523-smt-tr~6n4.md) - Manufacturer Name: CUI Devices - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SJ-3523-SMT-TR - Role: Line input jack - Datasheet URL: https://www.cuidevices.com/product/resource/sj-352x-smt.pdf **Pins:** - R [pin R] - S [pin S] - T [pin T] ### J7 — [SJ-3523-SMT-TR](https://www.flux.ai/vasy_skral/sj-3523-smt-tr~6n4.md) - Role: Line input jack - Datasheet URL: https://www.cuidevices.com/product/resource/sj-352x-smt.pdf - Manufacturer Name: CUI Devices - Manufacturer Part Number: SJ-3523-SMT-TR - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - R [pin R] - S [pin S] - T [pin T] ### J8 — [SJ-3523-SMT-TR](https://www.flux.ai/vasy_skral/sj-3523-smt-tr~6n4.md) - Manufacturer Name: CUI Devices - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SJ-3523-SMT-TR - Role: Line input jack - Datasheet URL: https://www.cuidevices.com/product/resource/sj-352x-smt.pdf **Pins:** - R [pin R] - S [pin S] - T [pin T] ### J9 — [SJ-3523-SMT-TR](https://www.flux.ai/vasy_skral/sj-3523-smt-tr~6n4.md) - Datasheet URL: https://www.cuidevices.com/product/resource/sj-352x-smt.pdf - Role: Line input jack - Manufacturer Name: CUI Devices - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SJ-3523-SMT-TR - Part Type: Connector **Pins:** - R [pin R] - S [pin S] - T [pin T] ### SW1 — [TS-1088-AR02016](https://www.flux.ai/lcsc/ts-1088-ar02016~e3n1.md) - LCSC Part Number: C720477 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302330_XUNPU-TS-1088-AR02016_C720477.pdf - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_XUNPU-TS-1088-AR02016_C720477.html - Role: Manual XMOS reset switch - Manufacturer Name: XUNPU(讯普) - Part Type: Tactile Switches - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 - Manufacturer Part Number: TS-1088-AR02016 **Pins:** - 1 [pin 1] - 2 [pin 2] ### U1 — [AK5558VN](https://www.flux.ai/lcsc/ak5558vn~sdg0.md) - Package or Case Code: VFQFN-64_L9.0-W9.0-P0.50-TL-EP6.3 - Role: 8-channel audio ADC - Manufacturer Name: AKM - LCSC Part Number: C2655448 - Manufacturer Part Number: AK5558VN - Role Details: Target ADC; input front-end must be finalized from AK5558 reference design before final pin wiring. - JLCPCB Part Class: Extended Part **Pins:** - AIN1N [pin 60] - AIN1P [pin 59] - AIN2N [pin 63] - AIN2P [pin 64] - AIN3N [pin 4] - AIN3P [pin 3] - AIN4N [pin 7] - AIN4P [pin 8] - AIN5N [pin 10] - AIN5P [pin 9] - AIN6N [pin 13] - AIN6P [pin 14] - AIN7N [pin 18] - AIN7P [pin 17] - AIN8N [pin 21] - AIN8P [pin 22] - AVDD1 [pin 2] - AVDD2 [pin 15] - AVSS1 [pin 1] - AVSS2 [pin 16] - BICK/DCLK [pin 33] - CKS0/SDA/CDTI [pin 43] - CKS1/CAD0_I2C/CSN [pin 44] - CKS2/SCL/CCLK [pin 45] - CKS3/CAD1 [pin 46] - DCKS/HPFE [pin 56] - DIF0/DSDSEL0 [pin 49] - DIF1/DSDSEL1 [pin 50] - DP [pin 55] - DSDOL4 [pin 40] - DSDOR4 [pin 41] - DVSS [pin 26] - EP [pin 65] - I2C [pin 54] - LDOE [pin 57] - LRCK/DSDOL1 [pin 34] - MCLK [pin 24] - MSN [pin 32] - ODP [pin 58] - OVF [pin 42] - PDN [pin 28] - PSN/CAD0_SPI [pin 53] - PW0 [pin 29] - PW1 [pin 30] - PW2 [pin 31] - SD/PMOD [pin 48] - SDTO1/DSDOL2 [pin 36] - SDTO2/DSDOR2 [pin 37] - SDTO3/DSDOL3 [pin 38] - SDTO4/DSDOR3 [pin 39] - SLOW/DCKB [pin 47] - TDM0 [pin 51] - TDM1 [pin 52] - TDMIN/DSDOR1 [pin 35] - TEST [pin 23] - TVDD [pin 25] - VDD18 [pin 27] - VREFH1 [pin 62] - VREFH2 [pin 6] - VREFH3 [pin 11] - VREFH4 [pin 19] - VREFL1 [pin 61] - VREFL2 [pin 5] - VREFL3 [pin 12] - VREFL4 [pin 20] ### U10 — [OPA1692IDGKR](https://www.flux.ai/jecstronic/opa1692idgkr~y0d.md) - Part Type: Operational Amplifier (OP-AMP) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Use as per-channel audio buffer/phase driver for AK5558 differential AIN+/AIN- nodes; final gain values follow AK5558 reference constraints. - Role: Amplification - Datasheet URL: https://www.ti.com/product/OPA1692?HQS=TI-null-null-octopart-df-pf-null-wwe - Manufacturer Part Number: OPA1692IDGKR - Manufacturer Name: Texas Instruments **Pins:** - -IN A [pin 2] - -IN B [pin 6] - +IN A [pin 3] - +IN B [pin 5] - OUT A [pin 1] - OUT B [pin 7] - V- [pin 4] - V+ [pin 8] ### U11 — [OPA1692IDGKR](https://www.flux.ai/jecstronic/opa1692idgkr~y0d.md) - Role Details: Use as per-channel audio buffer/phase driver for AK5558 differential AIN+/AIN- nodes; final gain values follow AK5558 reference constraints. - Datasheet URL: https://www.ti.com/product/OPA1692?HQS=TI-null-null-octopart-df-pf-null-wwe - Role: Amplification - Manufacturer Part Number: OPA1692IDGKR - Manufacturer Name: Texas Instruments - Part Type: Operational Amplifier (OP-AMP) - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - -IN A [pin 2] - -IN B [pin 6] - +IN A [pin 3] - +IN B [pin 5] - OUT A [pin 1] - OUT B [pin 7] - V- [pin 4] - V+ [pin 8] ### U12 — [OPA1692IDGKR](https://www.flux.ai/jecstronic/opa1692idgkr~y0d.md) - Datasheet URL: https://www.ti.com/product/OPA1692?HQS=TI-null-null-octopart-df-pf-null-wwe - Role: Amplification - Manufacturer Name: Texas Instruments - Manufacturer Part Number: OPA1692IDGKR - Part Type: Operational Amplifier (OP-AMP) - Role Details: Use as per-channel audio buffer/phase driver for AK5558 differential AIN+/AIN- nodes; final gain values follow AK5558 reference constraints. - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - -IN A [pin 2] - -IN B [pin 6] - +IN A [pin 3] - +IN B [pin 5] - OUT A [pin 1] - OUT B [pin 7] - V- [pin 4] - V+ [pin 8] ### U13 — [OPA1692IDGKR](https://www.flux.ai/jecstronic/opa1692idgkr~y0d.md) - Manufacturer Part Number: OPA1692IDGKR - Manufacturer Name: Texas Instruments - Role Details: Use as per-channel audio buffer/phase driver for AK5558 differential AIN+/AIN- nodes; final gain values follow AK5558 reference constraints. - Role: Amplification - Datasheet URL: https://www.ti.com/product/OPA1692?HQS=TI-null-null-octopart-df-pf-null-wwe - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Operational Amplifier (OP-AMP) **Pins:** - -IN A [pin 2] - -IN B [pin 6] - +IN A [pin 3] - +IN B [pin 5] - OUT A [pin 1] - OUT B [pin 7] - V- [pin 4] - V+ [pin 8] ### U14 — [OPA1692IDGKR](https://www.flux.ai/jecstronic/opa1692idgkr~y0d.md) - Datasheet URL: https://www.ti.com/product/OPA1692?HQS=TI-null-null-octopart-df-pf-null-wwe - Role: Amplification - Manufacturer Part Number: OPA1692IDGKR - Manufacturer Name: Texas Instruments - Part Type: Operational Amplifier (OP-AMP) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Use as per-channel audio buffer/phase driver for AK5558 differential AIN+/AIN- nodes; final gain values follow AK5558 reference constraints. **Pins:** - -IN A [pin 2] - -IN B [pin 6] - +IN A [pin 3] - +IN B [pin 5] - OUT A [pin 1] - OUT B [pin 7] - V- [pin 4] - V+ [pin 8] ### U15 — [STM32H743VIT6](https://www.flux.ai/lcsc/stm32h743vit6~z1ju.md) - Manufacturer Name: ST(意法半导体) - Voltage Supply: 1.71 ~ 3.6V - Manufacturer Part Number: STM32H743VIT6 - Operating Temperature: -40°C ~ 85°C (TA) - LCSC Part Number: C114409 - Product Info Url: https://lcsc.com/product-detail/ST-Microelectronics_STMicroelectronics-STM32H743VIT6_C114409.html - Symbol Style: parametric-v1 - Frequency: 480MHz - Package or Case Code: LQFP-100_L14.0-W14.0-P0.50-LS16.0-BL - Part Type: ST Microelectronics - Datasheet URL: https://www.st.com/resource/en/datasheet/stm32h743bi.pdf - JLCPCB Part Class: Extended Part - Role: USB Audio Class 2.0 controller - Role Details: Migration target replacing XMOS XU208. Captures AK5558 TDM via SAI/DMA and streams 8-channel PCM via USB HS ULPI PHY. **Pins:** - BOOT0 [pin 94] - NRST [pin 14] - PA0 [pin 22] - PA1 [pin 23] - PA10 [pin 69] - PA11 [pin 70] - PA12 [pin 71] - PA13 [pin 72] - PA14 [pin 76] - PA15 [pin 77] - PA2 [pin 24] - PA3 [pin 25] - PA4 [pin 28] - PA5 [pin 29] - PA6 [pin 30] - PA7 [pin 31] - PA8 [pin 67] - PA9 [pin 68] - PB0 [pin 34] - PB1 [pin 35] - PB10 [pin 46] - PB11 [pin 47] - PB12 [pin 51] - PB13 [pin 52] - PB14 [pin 53] - PB15 [pin 54] - PB2 [pin 36] - PB3 [pin 89] - PB4 [pin 90] - PB5 [pin 91] - PB6 [pin 92] - PB7 [pin 93] - PB8 [pin 95] - PB9 [pin 96] - PC0 [pin 15] - PC1 [pin 16] - PC10 [pin 78] - PC11 [pin 79] - PC12 [pin 80] - PC13 [pin 7] - PC14-OSC32_IN [pin 8] - PC15-OSC32_OUT [pin 9] - PC2_C [pin 17] - PC3_C [pin 18] - PC4 [pin 32] - PC5 [pin 33] - PC6 [pin 63] - PC7 [pin 64] - PC8 [pin 65] - PC9 [pin 66] - PD0 [pin 81] - PD1 [pin 82] - PD10 [pin 57] - PD11 [pin 58] - PD12 [pin 59] - PD13 [pin 60] - PD14 [pin 61] - PD15 [pin 62] - PD2 [pin 83] - PD3 [pin 84] - PD4 [pin 85] - PD5 [pin 86] - PD6 [pin 87] - PD7 [pin 88] - PD8 [pin 55] - PD9 [pin 56] - PE0 [pin 97] - PE1 [pin 98] - PE10 [pin 40] - PE11 [pin 41] - PE12 [pin 42] - PE13 [pin 43] - PE14 [pin 44] - PE15 [pin 45] - PE2 [pin 1] - PE3 [pin 2] - PE4 [pin 3] - PE5 [pin 4] - PE6 [pin 5] - PE7 [pin 37] - PE8 [pin 38] - PE9 [pin 39] - PH0-OSC_IN [pin 12] - PH1-OSC_OUT [pin 13] - VBAT [pin 6] - VCAP [pin 48] - VCAP [pin 73] - VDD [pin 50] - VDD [pin 27] - VDD [pin 100] - VDD [pin 11] - VDD [pin 75] - VDDA [pin 21] - VREF+ [pin 20] - VSS [pin 10] - VSS [pin 49] - VSS [pin 74] - VSS [pin 26] - VSS [pin 99] - VSSA [pin 19] ### U16 — [USB3343-CP-TR](https://www.flux.ai/lcsc/usb3343-cp-tr~6uhy.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1809090209_Microchip-Tech-USB3343-CP-TR_C112967.pdf - Package or Case Code: QFN-24_L4.0-W4.0-P0.50-BL-EP2.6 - Role: USB HS ULPI PHY - Manufacturer Name: MICROCHIP(美国微芯) - Product Info Url: https://lcsc.com/product-detail/USB_MICROCHIP_USB3343-CP-TR_USB3343-CP-TR_C112967.html - Role Details: Temporary validation only; compare footprint route-feasibility versus USB3300/USB3320. - Manufacturer Part Number: USB3343-CP-TR - Part Type: USB ICs - JLCPCB Part Class: Extended Part - LCSC Part Number: C112967 **Pins:** - CLKOUT [pin 2] - DATA0 [pin 4] - DATA1 [pin 5] - DATA2 [pin 6] - DATA3 [pin 7] - DATA4 [pin 8] - DATA5 [pin 10] - DATA6 [pin 11] - DATA7 [pin 12] - DIR [pin 1] - DM [pin 14] - DP [pin 13] - EP [pin 25] - ID [pin 18] - NXT [pin 3] - RBIAS [pin 19] - REFCLK/XI [pin 21] - RESETB [pin 22] - STP [pin 24] - VBAT [pin 16] - VBUS [pin 17] - VDD18 [pin 23] - VDD33 [pin 15] - VDDIO [pin 9] - XO [pin 20] ### U3 — [W25Q16JVUXIQ](https://www.flux.ai/lcsc/w25q16jvuxiq~9aq5.md) - Manufacturer Part Number: W25Q16JVUXIQ - Supply Voltage: 1.65 to 3.6V - Package or Case Code: USON-8_L3.0-W2.0-P0.50-BL-EP - Operating Temperature: -40 ~ +85°C - Frequency: 133MHz - Datasheet URL: https://www.lcsc.com/datasheet/C2843335.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1RZUl1fRVFbUTsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - License: https://creativecommons.org/licenses/by/4.0/ - LCSC Part Number: C2843335 - Manufacturer Name: WINBOND(华邦) - Symbol Style: parametric-v1 - Role: XMOS QSPI boot flash - Part Type: NOR FLASH - JLCPCB Part Class: Extended Part **Pins:** - ~{CS} [pin 1] - CLK [pin 6] - DI(IO0) [pin 5] - DO(IO1) [pin 2] - EP [pin 9] - GND [pin 4] - HOLD#orRESET#(IO3) [pin 7] - VCC [pin 8] - WP#(IO2) [pin 3] ### U4 — [RT9013-33GB](https://www.flux.ai/jecstronic/rt9013-33gb~xl8.md) - Role: 3.3V LDO - Part Type: Integrated Circuit - Manufacturer Name: Richtek Tech - Datasheet URL: https://datasheet.lcsc.com/lcsc/1809081207_Richtek-Tech-RT9013-33GB_C47773.pdf - Manufacturer Part Number: RT9013-33GB **Pins:** - EN - GND - IN - NC - OUT ### U5 — [MIC5219YMM](https://www.flux.ai/kicad-part-library/mic5219ymm~8bh.md) - Datasheet URL: http://ww1.microchip.com/downloads/en/DeviceDoc/MIC5219-500mA-Peak-Output-LDO-Regulator-DS20006021A.pdf - Role: 1.8V LDO - Manufacturer Part Number: MIC5219YMM - Manufacturer Name: Microchip Technology Inc. - Package or Case Code: MSOP-8_3x3mm_P0.65mm **Pins:** - ADJ [pin 4] - EN [pin 1] - GND [pin 6] - GND [pin 8] - GND [pin 5] - GND [pin 7] - IN [pin 2] - OUT [pin 3] ### U6 — [LDK130PU-R](https://www.flux.ai/adrian95/ldk130pu-r~4l1.md) - Role Details: Flux library did not provide a confirmed >=500mA 1.0V regulator; replace before final PCB. - License: https://creativecommons.org/licenses/by/4.0/ - Role: 1.0V regulator placeholder - Datasheet URL: https://www.st.com/resource/en/datasheet/ldk130.pdf - Manufacturer Name: STMicroelectronics - Manufacturer Part Number: LDK130PU-R - Part Type: Integrated Circuit **Pins:** - ADJ [pin 3] - EN [pin 4] - GND [pin 2] - IN [pin 6] - NC [pin 5] - OUT [pin 1] ### U7 — [OPA1692IDGKR](https://www.flux.ai/jecstronic/opa1692idgkr~y0d.md) - Role Details: Use as per-channel audio buffer/phase driver for AK5558 differential AIN+/AIN- nodes; final gain values follow AK5558 reference constraints. - Datasheet URL: https://www.ti.com/product/OPA1692?HQS=TI-null-null-octopart-df-pf-null-wwe - Manufacturer Part Number: OPA1692IDGKR - Manufacturer Name: Texas Instruments - Role: Amplification - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Operational Amplifier (OP-AMP) **Pins:** - -IN A [pin 2] - -IN B [pin 6] - +IN A [pin 3] - +IN B [pin 5] - OUT A [pin 1] - OUT B [pin 7] - V- [pin 4] - V+ [pin 8] ### U8 — [OPA1692IDGKR](https://www.flux.ai/jecstronic/opa1692idgkr~y0d.md) - Datasheet URL: https://www.ti.com/product/OPA1692?HQS=TI-null-null-octopart-df-pf-null-wwe - Role: Amplification - Manufacturer Part Number: OPA1692IDGKR - Manufacturer Name: Texas Instruments - Role Details: Use as per-channel audio buffer/phase driver for AK5558 differential AIN+/AIN- nodes; final gain values follow AK5558 reference constraints. - Part Type: Operational Amplifier (OP-AMP) - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - -IN A [pin 2] - -IN B [pin 6] - +IN A [pin 3] - +IN B [pin 5] - OUT A [pin 1] - OUT B [pin 7] - V- [pin 4] - V+ [pin 8] ### U9 — [OPA1692IDGKR](https://www.flux.ai/jecstronic/opa1692idgkr~y0d.md) - Datasheet URL: https://www.ti.com/product/OPA1692?HQS=TI-null-null-octopart-df-pf-null-wwe - Role: Amplification - Manufacturer Name: Texas Instruments - Manufacturer Part Number: OPA1692IDGKR - Role Details: Use as per-channel audio buffer/phase driver for AK5558 differential AIN+/AIN- nodes; final gain values follow AK5558 reference constraints. - Part Type: Operational Amplifier (OP-AMP) - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - -IN A [pin 2] - -IN B [pin 6] - +IN A [pin 3] - +IN B [pin 5] - OUT A [pin 1] - OUT B [pin 7] - V- [pin 4] - V+ [pin 8] ### X1 — [ASV-xxxMHz](https://www.flux.ai/kicad-part-library/asv-xxxmhz~22.md) - Frequency: 24.576MHz - Role: Audio MCLK oscillator - Part Type: Oscillator - Manufacturer Part Number: ASV-xxxMHz - Package or Case Code: Oscillator_SMD_Abracon_ASV-4Pin_7.0x5.1mm - Datasheet URL: http://www.abracon.com/Oscillators/ASV.pdf **Pins:** - EN [pin 1] - GND [pin 2] - OUT [pin 3] - Vdd [pin 4] ### X2 — [ASV-xxxMHz](https://www.flux.ai/kicad-part-library/asv-xxxmhz~22.md) - Role: Signal Generation - Manufacturer Part Number: ASV-xxxMHz - Part Type: Oscillator - Datasheet URL: http://www.abracon.com/Oscillators/ASV.pdf - Package or Case Code: Oscillator_SMD_Abracon_ASV-4Pin_7.0x5.1mm - Frequency: 24MHz **Pins:** - EN [pin 1] - GND [pin 2] - OUT [pin 3] - Vdd [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/saiko1992/8-channel-usb-audio-line-input-board~ys](https://www.flux.ai/saiko1992/8-channel-usb-audio-line-input-board~ys).* --- *Generated from [https://www.flux.ai/saiko1992/8-channel-usb-audio-line-input-board~ys](https://www.flux.ai/saiko1992/8-channel-usb-audio-line-input-board~ys)*