# Ideal Amethyst P.K.E. Meter ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** string2017 - **Created:** 3/2/2026 - **Last Updated:** 3/2/2026 - **Visibility:** Public - **System Architecture:** flowchart TD subgraph PATIENT [Patient Side Domain] DB15["DB15 Patient Connector"] PROT["Per Electrode Protection and EMI"] AFE["ADS1298 AFE"] RLD["RLD Drive and Protection"] PWRP["Isolated Patient Power Rails"] end subgraph BARRIER [Isolation Barrier] ISOUSB["USB 2.0 Full Speed Isolator"] ISODC["Isolated DC DC Converter"] BMARK["Creepage Clearance Keepout"] end subgraph HOST [Host Side Domain] USB["USB Connector"] ESDUSB["USB ESD Protection"] MCU["Host MCU"] PWRH["USB 5V Host Power"] end USB --> ESDUSB --> ISOUSB --> MCU PWRH --> ISODC --> PWRP DB15 --> PROT --> AFE AFE --> RLD BMARK --- ISOUSB BMARK --- ISODC ## Key Components ### D1 — [TPD4E02B04DQA](https://www.flux.ai/kicad-part-library/tpd4e02b04dqa.md) - Manufacturer Name: Texas Instruments Inc. - Datasheet URL: http://www.ti.com/lit/ds/symlink/tpd4e02b04.pdf - Package or Case Code: USON-10_2.5x1.0mm_P0.5mm - Package: USON-10 - Manufacturer Part Number: TPD4E02B04DQA - Role Details: USB ESD diode array for VBUS, D+, D-, ID/extra - Role: ESD Protection **Pins:** - G [pin 3] - G [pin 8] - IO1 [pin 1] - IO2 [pin 2] - IO3 [pin 4] - IO4 [pin 5] - NC [pin 10] - NC [pin 7] - NC [pin 9] - NC [pin 6] ### IC1 — [ADUM4160](https://www.flux.ai/vasyl/adum4160.md) - Manufacturer Part Number: ADUM4160 - Package: SOIC-16W - Part Type: Integrated Circuit - Role Details: Galvanically isolates USB 2.0 Full-Speed D+/D- across patient/host barrier - Manufacturer Name: Analog Devices Inc. - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/ADuM3160.pdf - Role: USB Isolator **Pins:** - DD- [pin 11] - DD+ [pin 10] - GND1 [pin 8] - GND1 [pin 2] - GND2 [pin 9] - GND2 [pin 15] - PDEN [pin 4] - PIN [pin 12] - SPD [pin 13] - SPU [pin 5] - UD- [pin 6] - UD+ [pin 7] - VBUS1 [pin 1] - VBUS2 [pin 16] - VDD1 [pin 3] - VDD2 [pin 14] ### J1 — [USB3131-30-0230-A](https://www.flux.ai/adrian95/usb3131-30-0230-a.md) - Part Type: Connector - Role Details: Host-side USB micro-B receptacle for USB FS link into ADuM4160 - Datasheet URL: https://gct.co/files/specs/usb3131-spec.pdf - Role: USB Connector - Manufacturer Name: GCT - License: https://creativecommons.org/licenses/by/4.0/ - Package: Through Hole - Manufacturer Part Number: USB3131-30-0230-A **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] ### U1 — [ADS1298IPAGR](https://www.flux.ai/vasy_skral/ads1298ipagr.md) - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fads1294 - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments - Role Details: ADS1298 patient-side biopotential ADC for 12-lead ECG - Package: TQFP-64 - Role: AFE ADC - Manufacturer Part Number: ADS1298IPAGR **Pins:** - ~CS [pin 39] - ~DRDY [pin 47] - ~PWDN [pin 35] - ~RESET [pin 36] - AVDD [pin 59] - AVDD [pin 21] - AVDD [pin 22] - AVDD [pin 19] - AVDD [pin 56] - AVDD1 [pin 54] - AVSS [pin 23] - AVSS [pin 57] - AVSS [pin 20] - AVSS [pin 58] - AVSS [pin 32] - AVSS1 [pin 53] - CLK [pin 37] - CLKSEL [pin 52] - DAISY_IN [pin 41] - DGND [pin 51] - DGND [pin 33] - DGND [pin 49] - DIN [pin 34] - DOUT [pin 43] - DVDD [pin 50] - DVDD [pin 48] - GPIO1 [pin 42] - GPIO2 [pin 44] - GPIO3 [pin 45] - GPIO4 [pin 46] - IN1N [pin 15] - IN1P [pin 16] - IN2N [pin 13] - IN2P [pin 14] - IN3N [pin 11] - IN3P [pin 12] - IN4N [pin 9] - IN4P [pin 10] - IN5N [pin 7] - IN5P [pin 8] - IN6N [pin 5] - IN6P [pin 6] - IN7N [pin 4] - IN7P [pin 3] - IN8N [pin 1] - IN8P [pin 2] - NC [pin 27] - NC [pin 29] - RESV1 [pin 31] - RLDIN [pin 62] - RLDINV [pin 61] - RLDOUT [pin 63] - RLDREF [pin 60] - SCLK [pin 40] - START [pin 38] - TESTP_PACE_OUT1 [pin 17] - TESTP_PACE_OUT2 [pin 18] - VCAP1 [pin 28] - VCAP2 [pin 30] - VCAP3 [pin 55] - VCAP4 [pin 26] - VREFN [pin 25] - VREFP [pin 24] - WCT [pin 64] ### U10 — [B88069X5591T902](https://www.flux.ai/adrian95/b88069x5591t902.md) - Role: Defib Protection - Manufacturer Part Number: B88069X5591T902 - Package: SMD - Role Details: Primary high-energy surge shunt (GDT) for electrode line to protective reference - Manufacturer Name: EPCOS - TDK Electronics - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Circuit Protection - Datasheet URL: https://www.tdk-electronics.tdk.com/inf/100/ds/ES400XSMD-X5591T902.pdf - Package or Case Code: B88069X5591T902 **Pins:** - 1 [pin 1] - 2 [pin 2] ### U11 — [B88069X5591T902](https://www.flux.ai/adrian95/b88069x5591t902.md) - Datasheet URL: https://www.tdk-electronics.tdk.com/inf/100/ds/ES400XSMD-X5591T902.pdf - Role Details: Primary high-energy surge shunt (GDT) for electrode line to protective reference - Package or Case Code: B88069X5591T902 - Manufacturer Part Number: B88069X5591T902 - Role: Defib Protection - Part Type: Circuit Protection - Manufacturer Name: EPCOS - TDK Electronics - License: https://creativecommons.org/licenses/by/4.0/ - Package: SMD **Pins:** - 1 [pin 1] - 2 [pin 2] ### U12 — [B88069X5591T902](https://www.flux.ai/adrian95/b88069x5591t902.md) - Role: Defib Protection - Package or Case Code: B88069X5591T902 - Datasheet URL: https://www.tdk-electronics.tdk.com/inf/100/ds/ES400XSMD-X5591T902.pdf - Role Details: Primary high-energy surge shunt (GDT) for electrode line to protective reference - Manufacturer Part Number: B88069X5591T902 - Part Type: Circuit Protection - Manufacturer Name: EPCOS - TDK Electronics - License: https://creativecommons.org/licenses/by/4.0/ - Package: SMD **Pins:** - 1 [pin 1] - 2 [pin 2] ### U13 — [B88069X5591T902](https://www.flux.ai/adrian95/b88069x5591t902.md) - Part Type: Circuit Protection - Manufacturer Name: EPCOS - TDK Electronics - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: B88069X5591T902 - Role Details: Primary high-energy surge shunt (GDT) for electrode line to protective reference - Role: Defib Protection - Package or Case Code: B88069X5591T902 - Datasheet URL: https://www.tdk-electronics.tdk.com/inf/100/ds/ES400XSMD-X5591T902.pdf - Package: SMD **Pins:** - 1 [pin 1] - 2 [pin 2] ### U14 — [B88069X5591T902](https://www.flux.ai/adrian95/b88069x5591t902.md) - Role Details: Primary high-energy surge shunt (GDT) for electrode line to protective reference - Manufacturer Part Number: B88069X5591T902 - Package: SMD - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: EPCOS - TDK Electronics - Part Type: Circuit Protection - Role: Defib Protection - Package or Case Code: B88069X5591T902 - Datasheet URL: https://www.tdk-electronics.tdk.com/inf/100/ds/ES400XSMD-X5591T902.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] ### U15 — [B88069X5591T902](https://www.flux.ai/adrian95/b88069x5591t902.md) - Package or Case Code: B88069X5591T902 - Datasheet URL: https://www.tdk-electronics.tdk.com/inf/100/ds/ES400XSMD-X5591T902.pdf - Package: SMD - Role: Defib Protection - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: EPCOS - TDK Electronics - Part Type: Circuit Protection - Manufacturer Part Number: B88069X5591T902 - Role Details: Primary high-energy surge shunt (GDT) for electrode line to protective reference **Pins:** - 1 [pin 1] - 2 [pin 2] ### U16 — [SRDA3.3-6.TBT](https://www.flux.ai/baueralex174/srda3p3-6ptbt.md) - Role Details: Secondary low-capacitance TVS array after series resistors to protect ADS1298 inputs - Package or Case Code: SOIC127P600X170-9N - Datasheet URL: https://www.semtech.com/uploads/documents/SRDA3.3-6.pdf - Manufacturer Name: Semtech Corporation - Package: SO-8 - Compliance: Pb-Free,Halogen Free,RoHS/WEEE Compliant - Manufacturer Part Number: SRDA3.3-6.TBT - Role: Clamp - Part Type: SRDA3.3-6.TBT - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - GND [pin 8] - I/O 1 [pin 1] - I/O 2 [pin 2] - I/O 3 [pin 4] - I/O 4 [pin 5] - I/O 5 [pin 6] - I/O 6 [pin 7] - VREF [pin 3] ### U17 — [SRDA3.3-6.TBT](https://www.flux.ai/baueralex174/srda3p3-6ptbt.md) - Manufacturer Part Number: SRDA3.3-6.TBT - Compliance: Pb-Free,Halogen Free,RoHS/WEEE Compliant - License: https://creativecommons.org/licenses/by/4.0/ - Package: SO-8 - Part Type: SRDA3.3-6.TBT - Role: Clamp - Manufacturer Name: Semtech Corporation - Package or Case Code: SOIC127P600X170-9N - Datasheet URL: https://www.semtech.com/uploads/documents/SRDA3.3-6.pdf - Role Details: Secondary low-capacitance TVS array after series resistors to protect ADS1298 inputs **Pins:** - GND [pin 8] - I/O 1 [pin 1] - I/O 2 [pin 2] - I/O 3 [pin 4] - I/O 4 [pin 5] - I/O 5 [pin 6] - I/O 6 [pin 7] - VREF [pin 3] ### U18 — [SRDA3.3-6.TBT](https://www.flux.ai/baueralex174/srda3p3-6ptbt.md) - Role: Clamp - Role Details: Secondary low-capacitance TVS array after series resistors to protect ADS1298 inputs - Manufacturer Name: Semtech Corporation - Package: SO-8 - Package or Case Code: SOIC127P600X170-9N - Datasheet URL: https://www.semtech.com/uploads/documents/SRDA3.3-6.pdf - Manufacturer Part Number: SRDA3.3-6.TBT - Compliance: Pb-Free,Halogen Free,RoHS/WEEE Compliant - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: SRDA3.3-6.TBT **Pins:** - GND [pin 8] - I/O 1 [pin 1] - I/O 2 [pin 2] - I/O 3 [pin 4] - I/O 4 [pin 5] - I/O 5 [pin 6] - I/O 6 [pin 7] - VREF [pin 3] ### U19 — [TLV70025DDCR](https://www.flux.ai/jharwinflux/tlv70025ddcr.md) - Role Details: 2.5 V low-noise LDO for ADS1298 AVDD alternative to adjustable TPS79301-EP config - Role: LDO - Datasheet URL: https://www.ti.com/lit/ds/symlink/tlv700.pdf - Package: SOT-23-5 - Manufacturer Part Number: TLV70025DDCR - Manufacturer Name: Texas Instruments Inc. - Part Type: Power Management - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - EN [pin 3] - GND [pin 2] - IN [pin 1] - N/C [pin 4] - OUT [pin 5] ### U2 — [Si8641BB-B-IS1](https://www.flux.ai/kicad-part-library/si8641bb-b-is1.md) - Datasheet URL: https://www.silabs.com/documents/public/data-sheets/si864x-datasheet.pdf - Package: SOIC-16 - Manufacturer Name: Texas Instruments Inc. - Manufacturer Part Number: Si8641BB-B-IS1 - Package or Case Code: SOIC-16_3.9x9.9mm_P1.27mm - Role Details: Isolates ADS1298 SPI control/status lines between host MCU and patient domain - Role: Digital Isolator **Pins:** - A1 [pin 3] - A2 [pin 4] - A3 [pin 5] - A4 [pin 6] - B1 [pin 14] - B2 [pin 13] - B3 [pin 12] - B4 [pin 11] - EN1 [pin 7] - EN2 [pin 10] - GND1 [pin 2] - GND1 [pin 8] - GND2 [pin 9] - GND2 [pin 15] - VDD1 [pin 1] - VDD2 [pin 16] ### U20 — [STM32F042K6U6](https://www.flux.ai/lcsc/stm32f042k6u6.md) - JLCPCB Part Class: Extended Part - Package or Case Code: QFN-32_L5.0-W5.0-P0.50-BL-EP3.4 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_STMicroelectronics-STM32F042K6U6_C110616.pdf - Role: MCU - Role Details: Host-side USB FS MCU to acquire ADS1298 data via isolated SPI and stream to USB; schema-safe pin naming for connection tool - LCSC Part Number: C110616 - Part Type: ST Microelectronics - Product Info Url: https://lcsc.com/product-detail/ST-Microelectronics_STMicroelectronics_STM32F042K6U6_STM32F042K6U6_C110616.html - Manufacturer Name: ST(意法半导体) - Package: QFN-32 - Manufacturer Part Number: STM32F042K6U6 **Pins:** - NRST [pin 4] - PA0 [pin 6] - PA1 [pin 7] - PA10 [pin 20] - PA11 [pin 21] - PA12 [pin 22] - PA13 [pin 23] - PA14 [pin 24] - PA15 [pin 25] - PA2 [pin 8] - PA3 [pin 9] - PA4 [pin 10] - PA5 [pin 11] - PA6 [pin 12] - PA7 [pin 13] - PA8 [pin 18] - PA9 [pin 19] - PB0 [pin 14] - PB1 [pin 15] - PB2 [pin 16] - PB3 [pin 26] - PB4 [pin 27] - PB5 [pin 28] - PB6 [pin 29] - PB7 [pin 30] - PB8 [pin 32] - PF0/OSC_IN [pin 2] - PF1/OSC_OUT [pin 3] - PF11_BOOT0 [pin 31] - VDD [pin 1] - VDDA [pin 5] - VDDIO2 [pin 17] - VSS [pin 33] ### U20 — [STM32F042F6P6](https://www.flux.ai/holdenk/stm32f042f6p6.md) - Package: TSSOP-20 - Manufacturer Name: STMicroelectronics NV - Role Details: Host-side USB FS MCU to acquire ADS1298 data via isolated SPI and stream to USB - Role: MCU - Manufacturer Part Number: STM32F042F6P6 **Pins:** - NRST - PA0 - PA1 - PA10_[PA12] - PA13 - PA14 - PA2 - PA3 - PA4 - PA5 - PA6 - PA7 - PA9_[PA11] - PB1 - PB8-BOOT0 - PF0-OSC_IN - PF1-OSC_OUT - VDD - VDDA - VSS ### U3 — [REM2A-0505S - 2W DC/DC-CONVERTER MEDLINE DIP](https://www.flux.ai/pokemonprofessor/rem2a-0505s-2w-dcdc-converter-medline-dip.md) - Manufacturer Name: RECOM Power GmbH - Max Output Voltage: 5V - Datasheet URL: https://cdn2.flux.ai/copilot-datasheets/pdf-upload-4284d145a62d20213546bf56dd6eaa82301e6d99dc42ac76df9b55694ba28a87/e70f86d11e17506a99527c6d40877bc141a11889b1df54f33c935aeceaae9ca7.pdf?GoogleAccessId=graviton-mvp%40appspot.gserviceaccount.com&Expires=4893490588&Signature=o4EfpsWoXIv84aX1SbLS7xhUTFYrnwOI2fWnbgFhocfpiA%2FuAGwwMjnA7vNyKvMfyrvoIrhWuL4pcbOefaejsjRPjXiRO7pGnSFMBzt7ses4gVvCqqLpCE%2FD8hQxu0P8j8dnUaihcgQq7kkWUHzLZ7%2ByvKK2y3k%2Fz4LAazmWmDMI3ZUjWLoAeCXUM6w2%2Bpm7BZdaPuEBP1sKmkNZUJr9RtuzQpOF7y3QDhngb3nbuGHZc%2BToOYUCSTdvod8koWUJv5zxHovpbWoadHDSItLzVsxSK3yl4hf%2BsdjaAoeR60qHbELrGHexTCc8bWzzRH%2Frjv%2B740M3CN19mvh5GtLT7g%3D%3D - Role: Isolated DC/DC - Manufacturer Part Number: REM2A-0505S - Package or Case Code: SMD - Current: 0.5A - Package: DIP Module - Digi-Key Part Number: 945-REM2A-0505S-ND - Operating Voltage: 12V - Role Details: Medical-grade isolated 5V->5V module feeding patient-side low-noise LDO rails - Part Type: Regulator **Pins:** - -Vin [pin 1] - -Vout [pin 10] - +Vin [pin 16] - +Vout [pin 9] - CTRL [pin 2] - NC [pin 7] - NC [pin 8] ### U4 — [10090928-P154XLF](https://www.flux.ai/lcsc/10090928-p154xlf.md) - Manufacturer Part Number: 10090928-P154XLF - Package: D-Sub-15 TH - Part Type: D-Sub/DVI/HDMI Connectors - Manufacturer Name: Amphenol - Role: Patient Connector - JLCPCB Part Class: Extended Part - Package or Case Code: DB15-TH_C9900020059 - Role Details: DB15 patient electrode connector; will map RA/LA/LL/RL/V1-V6 - LCSC Part Number: C3013505 **Pins:** - 1 [pin 1] - 10 [pin 10] - 11 [pin 11] - 12 [pin 12] - 13 [pin 13] - 14 [pin 14] - 15 [pin 15] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] - 9 [pin 9] ### U5 — [TPS78233DDC](https://www.flux.ai/kicad-part-library/tps78233ddc.md) - Package or Case Code: SOT-23-5 - Role Details: Patient-side 3.3V rail (DVDD and digital isolator VDD2) from isolated 5V - Manufacturer Name: Texas Instruments Inc. - Package: SOT-23-5 - Role: LDO - Manufacturer Part Number: TPS78233DDC - Datasheet URL: http://www.ti.com/lit/gpn/tps782 **Pins:** - EN [pin 3] - GND [pin 4] - GND [pin 2] - IN [pin 1] - OUT [pin 5] ### U6 — [TPS79301-EP](https://www.flux.ai/kicad-part-library/tps79301-ep.md) - Manufacturer Part Number: TPS79301-EP - Role: LDO - Manufacturer Name: Texas Instruments Inc. - Datasheet URL: http://www.ti.com/lit/ds/symlink/tps79333-ep.pdf - Role Details: Patient-side analog rail for ADS1298 AVDD (set to 2.5V) from isolated 5V - Package or Case Code: SOT-23-6 - Package: SOT-23 **Pins:** - BP [pin 4] - EN [pin 3] - FB [pin 5] - GND [pin 2] - IN [pin 1] - OUT [pin 6] ### U7 — [B88069X5591T902](https://www.flux.ai/adrian95/b88069x5591t902.md) - Role: Defib Protection - Role Details: Primary high-energy surge shunt (GDT) for electrode line to protective reference - Part Type: Circuit Protection - Manufacturer Name: EPCOS - TDK Electronics - License: https://creativecommons.org/licenses/by/4.0/ - Package: SMD - Manufacturer Part Number: B88069X5591T902 - Package or Case Code: B88069X5591T902 - Datasheet URL: https://www.tdk-electronics.tdk.com/inf/100/ds/ES400XSMD-X5591T902.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] ### U8 — [B88069X5591T902](https://www.flux.ai/adrian95/b88069x5591t902.md) - Part Type: Circuit Protection - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: EPCOS - TDK Electronics - Manufacturer Part Number: B88069X5591T902 - Package: SMD - Package or Case Code: B88069X5591T902 - Datasheet URL: https://www.tdk-electronics.tdk.com/inf/100/ds/ES400XSMD-X5591T902.pdf - Role: Defib Protection - Role Details: Primary high-energy surge shunt (GDT) for electrode line to protective reference **Pins:** - 1 [pin 1] - 2 [pin 2] ### U9 — [B88069X5591T902](https://www.flux.ai/adrian95/b88069x5591t902.md) - Role Details: Primary high-energy surge shunt (GDT) for electrode line to protective reference - Package or Case Code: B88069X5591T902 - Datasheet URL: https://www.tdk-electronics.tdk.com/inf/100/ds/ES400XSMD-X5591T902.pdf - Package: SMD - Role: Defib Protection - Manufacturer Part Number: B88069X5591T902 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: EPCOS - TDK Electronics - Part Type: Circuit Protection **Pins:** - 1 [pin 1] - 2 [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/string2017/ideal-amethyst-ppkpep-meter](https://www.flux.ai/string2017/ideal-amethyst-ppkpep-meter).* --- *Generated from [https://www.flux.ai/string2017/ideal-amethyst-ppkpep-meter](https://www.flux.ai/string2017/ideal-amethyst-ppkpep-meter)*