# Neura Vital Patch

## Description

Schematics and PCB layout for Neura Vital Patch with parameters

## Project Details

- **Owner:** gnsk27
- **Created:** 7/27/2026
- **Last Updated:** 7/27/2026
- **Visibility:** Public
- **Stars:** 1

## Key Components

### D3 — [PESD3V3L5UY](https://flux.ai/kicad-part-library/pesd3v3l5uy~ysh.md)

- Manufacturer Name: Texas Instruments Inc\.
- Role: Low\-Leakage ESD Protection
- Manufacturer Part Number: PESD3V3L5UY
- Package or Case Code: SOT\-363\_SC\-70\-6
- Role Details: Candidate electrode/biopotential ESD array; leakage must be verified against patient/electrochemical input budget\.
- Datasheet URL: https://assets\.nexperia\.com/documents/data\-sheet/PESDXL5UF\_V\_Y\.pdf
- Functional Group: Protection

**Pins:**
- A [pin 2]
- K1 [pin 1]
- K2 [pin 3]
- K3 [pin 4]
- K4 [pin 5]
- K5 [pin 6]

### J1 — [TYPE\-C\-16M\-0243MD](https://flux.ai/lcsc/type-c-16m-0243md~qm.md)

- Functional Group: Connectors
- Part Type: USB Connectors
- JLCPCB Part Class: Extended Part
- LCSC Part Number: C2798172
- Manufacturer Part Number: TYPE\-C\-16M\-0243MD
- Role Details: USB\-C sink for charging; patient\-connected measurements must be hardware\-disabled while attached\.
- Manufacturer Name: USAKRO\(美韩\)
- Datasheet URL: https://www\.lcsc\.com/datasheet/C2798172\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=QlUIU1dSRgJcA1FQQVUMBgdeElQIVldRQ1daVQdeQAcxVlNRTlhWVFFTQ1hXUjsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D
- Package or Case Code: USB\-C\-SMD\_TYPE\-611\-T3\-W
- Role: USB\-C Connector

**Pins:**
- 17 [pin 17]
- 18 [pin 18]
- 19 [pin 19]
- 20 [pin 20]
- CC1 [pin A5]
- CC2 [pin B5]
- DN1 [pin A7]
- DN2 [pin B7]
- DP1 [pin A6]
- DP2 [pin B6]
- GND [pin A1]
- GND [pin A12]
- GND [pin B1]
- GND [pin B12]
- SBU1 [pin A8]
- SBU2 [pin B8]
- VBUS [pin A9]
- VBUS [pin B4]
- VBUS [pin B9]
- VBUS [pin A4]

### J2 — [S2B\-PH\-SM4\-TB\(LF\)\(SN\)](https://flux.ai/lcsc/s2b-ph-sm4-tblfsn~dy5m.md)

- Manufacturer Name: JST
- Role: Battery Connector
- Role Details: 2\-pin JST\-PH LiPo pack input; use protected cell/pack with NTC routed separately or local thermistor\.
- JLCPCB Part Class: Extended Part
- Connector Type: Wire\-to\-board connector
- Part Type: Wire To Board / Wire To Wire Connector
- Product Info Url: https://lcsc\.com/product\-detail/\_JST\-Sales\-America\_S2B\-PH\-SM4\-TB\-LF\-SN\_JST\-Sales\-America\-S2B\-PH\-SM4\-TB\-LF\-SN\_C295747\.html
- Package or Case Code: CONN\-SMD\_P2\.00\_S2B\-PH\-SM4\-TB\-LF\-SN
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2102031704\_JST\-S2B\-PH\-SM4\-TB\-LF\-SN\_C295747\.pdf
- Manufacturer Part Number: S2B\-PH\-SM4\-TB\(LF\)\(SN\)
- Connector Rows: 1
- Connector Gender: Female
- Functional Group: Connectors
- LCSC Part Number: C295747
- Connector Positions: 2
- Connector Pitch: 2mm

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]
- 4 [pin 4]

### J3 — [5034801000](https://flux.ai/adrian95/5034801000~ef9.md)

- Role: FPC Sensor/Electrode Connector
- Manufacturer Name: Molex
- Datasheet URL: https://tools\.molex\.com/pdm\_docs/sd/5034801000\_sd\.pdf
- Manufacturer Part Number: 5034801000
- Role Details: Routes ECG electrodes, electrochemical WE/RE/CE electrodes, pressure/optical flex tails, and guard/reference lines\.
- License: https://creativecommons\.org/licenses/by/4\.0/
- Functional Group: Connectors
- Part Type: Connector

**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]

### J4 — [5034801000](https://flux.ai/adrian95/5034801000~ef9.md)

- Functional Group: Connectors
- Manufacturer Name: Molex
- Datasheet URL: https://tools\.molex\.com/pdm\_docs/sd/5034801000\_sd\.pdf
- Manufacturer Part Number: 5034801000
- Role Details: Routes ECG electrodes, electrochemical WE/RE/CE electrodes, pressure/optical flex tails, and guard/reference lines\.
- Role: FPC Sensor/Electrode Connector
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Connector

**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]

### J5 — [ARM JTAG SWD 10Pin 0\.05" Connector](https://flux.ai/vasy_skral/arm-jtag-swd-10pin-005-connector~y0b.md)

- Role Details: Cortex 10\-pin SWD header; lock/secure debug for production biomedical builds\.
- Part Type: Connector
- Role: SWD Debug Connector
- Symbol Style: parametric\-v1
- Manufacturer Part Number: FTSH\-105\-01\-L\-DV\-007\-K
- Functional Group: Debug / Programming
- Manufacturer Name: Analog Devices
- Datasheet URL: https://suddendocs\.samtec\.com/catalog\_english/ftsh\_smt\.pdf

**Pins:**
- \~RESET\~ [pin 10]
- GND [pin 5]
- GND [pin 3]
- GNDDetect [pin 9]
- NC/TDI [pin 8]
- SWDCLK/TCK [pin 4]
- SWDIO/TMS [pin 2]
- SWO/TDO [pin 6]
- VTref [pin 1]

### Q1 — [IRLML2502](https://flux.ai/lcsc/irlml2502~q9d8.md)

- Product Info Url: https://lcsc\.com/product\-detail/MOSFET\_HUASHUO\-IRLML2502\_C518800\.html
- Role: Protection
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2005121032\_HUASHUO\-IRLML2502\_C518800\.pdf
- Functional Group: Patient Safety Disconnect, Power / Charging
- Part Type: MOSFETs
- JLCPCB Part Class: Extended Part
- LCSC Part Number: C518800
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: USB\-present hardware interlock: NMOS clamps PATIENT\_SW\_CTRL low via drain\-source path whenever USB\_VBUS drives gate high through R27; R25 limits MCU contention current\.
- Manufacturer Part Number: IRLML2502
- Manufacturer Name: HUASHUO\(华朔\)
- Package or Case Code: SOT\-23\-3\_L2\.9\-W1\.3\-P1\.90\-LS2\.4\-BR

**Pins:**
- D [pin 3]
- G [pin 1]
- S [pin 2]

### RT1 — [NTCSC0402E3103FLFT](https://flux.ai/adrian95/ntcsc0402e3103flft~i0t.md)

- Functional Group: Power / Charging, Patient Safety
- Manufacturer Part Number: NTCSC0402E3103FLFT
- License: https://creativecommons\.org/licenses/by/4\.0/
- Resistance: 10kΩ
- Part Type: Thermistor
- Datasheet URL: https://www\.vishay\.com/docs/29238/ntcsc0402e3t\.pdf
- Role Details: 10 kΩ NTC thermistor on BQ24074 TS; place/bond in thermal contact with the LiPo cell\. Charger suspends outside approximately 0°C to 50°C for 10 kΩ NTC curve per BQ24074 datasheet\.
- Role: Sensing \(Shunt\)
- Manufacturer Name: Vishay Dale

**Pins:**
- \~ [pin 2]
- \~ [pin 1]

### SW1 — [TS\-1088\-AR02016](https://flux.ai/lcsc/ts-1088-ar02016~e3n1.md)

- Role Details: Reset/boot/user control switch for bring\-up\.
- Role: Tactile Switch
- Manufacturer Name: XUNPU\(讯普\)
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2409302330\_XUNPU\-TS\-1088\-AR02016\_C720477\.pdf
- JLCPCB Part Class: Extended Part
- Functional Group: User / Debug Controls
- Manufacturer Part Number: TS\-1088\-AR02016
- Product Info Url: https://lcsc\.com/product\-detail/Tactile\-Switches\_XUNPU\-TS\-1088\-AR02016\_C720477\.html
- LCSC Part Number: C720477
- Part Type: Tactile Switches
- Package or Case Code: SW\-SMD\_L3\.9\-W3\.0\-P4\.45

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW2 — [TS\-1088\-AR02016](https://flux.ai/lcsc/ts-1088-ar02016~e3n1.md)

- Role Details: Reset/boot/user control switch for bring\-up\.
- Manufacturer Name: XUNPU\(讯普\)
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2409302330\_XUNPU\-TS\-1088\-AR02016\_C720477\.pdf
- JLCPCB Part Class: Extended Part
- Role: Tactile Switch
- Manufacturer Part Number: TS\-1088\-AR02016
- Product Info Url: https://lcsc\.com/product\-detail/Tactile\-Switches\_XUNPU\-TS\-1088\-AR02016\_C720477\.html
- LCSC Part Number: C720477
- Part Type: Tactile Switches
- Package or Case Code: SW\-SMD\_L3\.9\-W3\.0\-P4\.45
- Functional Group: User / Debug Controls

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### U1 — [MDBT50Q\-1MV2](https://flux.ai/jecstronic/mdbt50q-1mv2~4xq.md)

- Part Type: Module
- Datasheet URL: https://www\.raytac\.com/download/index\.php?index\_id=43
- Role: BLE MCU Module
- Functional Group: BLE MCU / Compute
- Role Details: nRF52840 module; central controller, BLE telemetry, SPI/I2C sensor master; antenna must sit at flex edge with keepout\.
- Manufacturer Name: Raytac
- Manufacturer Part Number: MDBT50Q\-1MV2
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- D\- [pin 34]
- D\+ [pin 35]
- DCCH [pin 31]
- GND [pin 55]
- GND [pin 33]
- GND [pin 1]
- GND [pin 2]
- GND [pin 15]
- P0\.00/XL1 [pin 17]
- P0\.01/XL2 [pin 18]
- P0\.02/AIN0 [pin 11]
- P0\.03/AIN1 [pin 9]
- P0\.04/AIN2 [pin 20]
- P0\.05/AIN3 [pin 21]
- P0\.06 [pin 22]
- P0\.07/TRACECLK [pin 23]
- P0\.08 [pin 24]
- P0\.09/NFC1 [pin 52]
- P0\.10/NFC2 [pin 54]
- P0\.11/TRACEDATA2 [pin 27]
- P0\.12/TRACEDATA1 [pin 29]
- P0\.13 [pin 37]
- P0\.14 [pin 36]
- P0\.15 [pin 39]
- P0\.16 [pin 38]
- P0\.17 [pin 41]
- P0\.18/\~RESET [pin 40]
- P0\.19 [pin 42]
- P0\.20 [pin 44]
- P0\.21 [pin 43]
- P0\.22 [pin 46]
- P0\.23 [pin 45]
- P0\.24 [pin 48]
- P0\.25 [pin 49]
- P0\.26 [pin 19]
- P0\.27 [pin 16]
- P0\.28/AIN4 [pin 13]
- P0\.29/AIN5 [pin 10]
- P0\.30/AIN6 [pin 14]
- P0\.31/AIN7 [pin 12]
- P1\.00/TRACEDATA0 [pin 47]
- P1\.01 [pin 61]
- P1\.02 [pin 50]
- P1\.03 [pin 60]
- P1\.04 [pin 56]
- P1\.05 [pin 59]
- P1\.06 [pin 57]
- P1\.07 [pin 58]
- P1\.08 [pin 25]
- P1\.09/TRACEDATA3 [pin 26]
- P1\.10 [pin 3]
- P1\.11 [pin 4]
- P1\.12 [pin 5]
- P1\.13 [pin 6]
- P1\.14 [pin 7]
- P1\.15 [pin 8]
- SWDCLK [pin 53]
- SWDIO [pin 51]
- VBUS [pin 32]
- VDD [pin 28]
- VDDH [pin 30]

### U10 — [MAX17048G\+T10](https://flux.ai/lcsc/max17048gplust10~jvyd.md)

- Manufacturer Name: MAXIM
- Manufacturer Part Number: MAX17048G\+T10
- LCSC Part Number: C2682616
- Package or Case Code: DFN\-8\_L2\.0\-W2\.0\-P0\.50\-BL\-EP
- Role Details: I2C fuel gauge for LiPo SOC/runtime tracking and battery safety telemetry\.
- Datasheet URL: https://www\.analog\.com/media/en/technical\-documentation/data\-sheets/MAX17048\-MAX17049\.pdf
- Functional Group: Power / Battery Monitor
- Part Type: Battery Management ICs
- Role: Battery Fuel Gauge
- Symbol Style: parametric\-v1
- JLCPCB Part Class: Extended Part

**Pins:**
- \~\{ALRT\} [pin 5]
- CELL [pin 2]
- CTG [pin 1]
- EP [pin 9]
- GND [pin 4]
- QSTRT [pin 6]
- SCL [pin 7]
- SDA [pin 8]
- VDD [pin 3]

### U11 — [ADG824BCP](https://flux.ai/kicad-part-library/adg824bcp~e78.md)

- Role: Patient Electrode Disconnect Switch
- Datasheet URL: https://www\.analog\.com/media/en/technical\-documentation/data\-sheets/ADG884\.pdf
- Manufacturer Name: Texas Instruments Inc\.
- Package or Case Code: Analog\_LFCSP\-UQ\-10\_1\.3x1\.6mm\_P0\.4mm
- Manufacturer Part Number: ADG824BCP
- Role Details: Hardware disconnect for ECG/electrochemical electrode paths during USB presence; exact leakage/fault rating requires datasheet verification\.
- Functional Group: Patient Safety Disconnect

**Pins:**
- D1 [pin 2]
- D2 [pin 8]
- GND [pin 10]
- IN1 [pin 4]
- IN2 [pin 5]
- S1A [pin 1]
- S1B [pin 3]
- S2A [pin 9]
- S2B [pin 7]
- VDD [pin 6]

### U12 — [ADG824BCP](https://flux.ai/kicad-part-library/adg824bcp~e78.md)

- Role Details: Hardware disconnect for ECG/electrochemical electrode paths during USB presence; exact leakage/fault rating requires datasheet verification\.
- Datasheet URL: https://www\.analog\.com/media/en/technical\-documentation/data\-sheets/ADG884\.pdf
- Manufacturer Name: Texas Instruments Inc\.
- Package or Case Code: Analog\_LFCSP\-UQ\-10\_1\.3x1\.6mm\_P0\.4mm
- Manufacturer Part Number: ADG824BCP
- Functional Group: Patient Safety Disconnect
- Role: Patient Electrode Disconnect Switch

**Pins:**
- D1 [pin 2]
- D2 [pin 8]
- GND [pin 10]
- IN1 [pin 4]
- IN2 [pin 5]
- S1A [pin 1]
- S1B [pin 3]
- S2A [pin 9]
- S2B [pin 7]
- VDD [pin 6]

### U13 — [ADG824BCP](https://flux.ai/kicad-part-library/adg824bcp~e78.md)

- Datasheet URL: https://www\.analog\.com/media/en/technical\-documentation/data\-sheets/ADG884\.pdf
- Manufacturer Name: Texas Instruments Inc\.
- Package or Case Code: Analog\_LFCSP\-UQ\-10\_1\.3x1\.6mm\_P0\.4mm
- Manufacturer Part Number: ADG824BCP
- Role Details: Hardware disconnect for ECG/electrochemical electrode paths during USB presence; exact leakage/fault rating requires datasheet verification\.
- Functional Group: Patient Safety Disconnect
- Role: Patient Electrode Disconnect Switch

**Pins:**
- D1 [pin 2]
- D2 [pin 8]
- GND [pin 10]
- IN1 [pin 4]
- IN2 [pin 5]
- S1A [pin 1]
- S1B [pin 3]
- S2A [pin 9]
- S2B [pin 7]
- VDD [pin 6]

### U14 — [TPD1E05U06DPYR](https://flux.ai/lcsc/tpd1e05u06dpyr~sh59.md)

- Manufacturer Name: TPD1E05U06DPYR
- Part Type: ESD and Surge Protection \(TVS/ESD\)
- Role Details: USB\-C VBUS transient/ESD clamp placed close to connector\.
- Functional Group: Protection
- JLCPCB Part Class: Extended Part
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/tpd1e05u06\.pdf
- Role: ESD Protection
- Manufacturer Part Number: TPD1E05U06DPYR
- LCSC Part Number: C2937017
- Package or Case Code: DFN1006\-2L\-RD

**Pins:**
- A [pin 2]
- C [pin 1]

### U2 — [BQ24074RGTT](https://flux.ai/lcsc/bq24074rgtt~fpyl.md)

- Functional Group: Power / Charging
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/bq24074\.pdf
- Part Type: Battery Management ICs
- JLCPCB Part Class: Extended Part
- Package: VQFN\-16 RGT \(3 mm × 3 mm\) with exposed thermal pad
- Implementation Details: Standalone single\-cell Li\-Ion/Li\-Polymer linear charger and power\-path management IC; 4\.2 V battery regulation, 4\.4 V OUT regulation, 10\.5 V OVP, 1\.5 A programmable fast charge/input current limit\.
- Role Details: USB\-C input to LiPo/SYS power path; charge current to be conservative for skin\-contact wearable; TS used for battery NTC\.
- LCSC Part Number: C2861252
- Operating Voltage: IN operating range 4\.35–10\.2 V for BQ24074; IN withstand/recommended range up to 26 V, abs max 28 V
- Role: Battery Charger / Power Path
- License: https://creativecommons\.org/licenses/by/4\.0/
- Symbol Style: parametric\-v1
- Operating Temperature: \-40 to 85°C
- Manufacturer Part Number: BQ24074RGTT
- Package or Case Code: VQFN\-16\_L3\.0\-W3\.0\-P0\.50\-TL\-EP1\.7
- Manufacturer Name: Texas Instruments

**Pins:**
- \~\{CE\} [pin 4]
- \~\{CHG\} [pin 9]
- \~\{PGOOD\} [pin 7]
- BAT [pin 2]
- BAT [pin 3]
- EN1 [pin 6]
- EN2 [pin 5]
- EP [pin 17]
- ILIM [pin 12]
- IN [pin 13]
- ISET [pin 16]
- ITERM [pin 15]
- OUT [pin 11]
- OUT [pin 10]
- TMR [pin 14]
- TS [pin 1]
- VSS [pin 8]

### U3 — [TPS63031DSKR](https://flux.ai/adrian95/tps63031dskr~yd3.md)

- Manufacturer Name: Texas Instruments
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/tps63030\.pdf
- Manufacturer Part Number: TPS63031DSKR
- Role: 3\.3V Buck\-Boost Regulator
- Functional Group: Power / Regulation
- Role Details: Generates VSYS\_3V3 from charger SYS/BAT rail; sized for BLE \+ AFEs \+ PPG LED pulse load budget \~150 mA peak\.
- Part Type: Integrated Circuit

**Pins:**
- EN [pin 6]
- EP [pin 11]
- FB [pin 10]
- GND [pin 9]
- L1 [pin 4]
- L2 [pin 2]
- PGND [pin 3]
- PS/SYNC [pin 7]
- VIN [pin 5]
- VINA [pin 8]
- VOUT [pin 1]

### U4 — [LDK130PU\-R](https://flux.ai/adrian95/ldk130pu-r~4l1.md)

- Role Details: Creates VDD\_1V8 for MAX30102 core and optional 1\.8 V digital/analog domains\.
- Manufacturer Name: STMicroelectronics
- Part Type: Integrated Circuit
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://www\.st\.com/resource/en/datasheet/ldk130\.pdf
- Manufacturer Part Number: LDK130PU\-R
- Role: 1\.8V Low\-Noise LDO
- Functional Group: Power / Regulation

**Pins:**
- ADJ [pin 3]
- EN [pin 4]
- GND [pin 2]
- IN [pin 6]
- NC [pin 5]
- OUT [pin 1]

### U5 — [ADS1292RIRSMR](https://flux.ai/lcsc/ads1292rirsmr~kn10.md)

- Functional Group: ECG AFE
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2410010131\_Texas\-Instruments\-ADS1292RIRSMR\_C456281\.pdf
- Manufacturer Name: TI\(德州仪器\)
- Package or Case Code: QFN\-32\_L4\.0\-W4\.0\-P0\.40\-TL\-EP2\.8
- JLCPCB Part Class: Extended Part
- Role: ECG Analog Front End
- Product Info Url: https://lcsc\.com/product\-detail/Analog\-To\-Digital\-Converters\-ADCs\_Texas\-Instruments\-Texas\-Instruments\-ADS1292RIRSMR\_C456281\.html
- LCSC Part Number: C456281
- Role Details: Battery\-only patient\-applied ECG acquisition; inputs routed through current limiting, ESD, and hardware disconnect\.
- Part Type: Analog To Digital Converters \(ADCs\)
- Manufacturer Part Number: ADS1292RIRSMR

**Pins:**
- \~\{CS\} [pin 18]
- \~\{DRDY\} [pin 22]
- \~\{PWDN\}/\~\{RESET\} [pin 15]
- AVDD [pin 12]
- AVSS [pin 13]
- CLK [pin 17]
- CLKSEL [pin 14]
- DGND [pin 24]
- DIN [pin 19]
- DOUT [pin 21]
- DVDD [pin 23]
- EP [pin 33]
- GPIO1/RCLK1 [pin 26]
- GPIO2/RCLK2 [pin 25]
- IN1N [pin 3]
- IN1P [pin 4]
- IN2N [pin 5]
- IN2P [pin 6]
- PGA1N [pin 1]
- PGA1P [pin 2]
- PGA2N [pin 7]
- PGA2P [pin 8]
- RESP\_MODN/IN3N [pin 32]
- RESP\_MODP/IN3P [pin 31]
- RLDIN/RLDREF [pin 29]
- RLDINV [pin 28]
- RLDOUT [pin 30]
- SCLK [pin 20]
- START [pin 16]
- VCAP1 [pin 11]
- VCAP2 [pin 27]
- VREFN [pin 10]
- VREFP [pin 9]

### U6 — [MAX30102EFD\+T](https://flux.ai/adrian95/max30102efdplust~tfq.md)

- Functional Group: PPG / Heart Rate
- Role Details: Heart\-rate PPG; requires 1\.8 V VDD, 3\.3 V LED supply, optical isolation, and contact\-pressure compensation\.
- Manufacturer Name: Analog Devices Inc\./Maxim Integrated
- Manufacturer Part Number: MAX30102EFD\+T
- Role: PPG Heart\-Rate Sensor
- Part Type: Sensor
- Datasheet URL: https://www\.analog\.com/media/en/technical\-documentation/data\-sheets/MAX30102\.pdf
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- \~INT [pin 13]
- GND [pin 12]
- PGND [pin 4]
- SCL [pin 2]
- SDA [pin 3]
- VDD [pin 11]
- VLED\+ [pin 10]
- VLED\+ [pin 9]

### U7 — [AD5940BCBZ\-RL7](https://flux.ai/lcsc/ad5940bcbz-rl7~ibmq.md)

- Role: Electrochemical AFE
- Manufacturer Name: ADI\(亚德诺\)
- Manufacturer Part Number: AD5940BCBZ\-RL7
- Role Details: Research\-grade sweat/ISF lactate and glucose acquisition; supports amperometric/EIS methods; clinical analyte claims require validation\.
- LCSC Part Number: C650308
- JLCPCB Part Class: Extended Part
- Package or Case Code: BGA\-56\_L4\.2\-W3\.6\-R8\-C7\-P0\.40\-TL
- Functional Group: Electrochemical AFE

**Pins:**
- \~\{RESET\} [pin F1]
- AFE1 [pin B2]
- AFE2 [pin C2]
- AFE3 [pin A2]
- AFE4 [pin A1]
- AGND [pin E3]
- AGND [pin C4]
- AGND\_REF [pin D5]
- AIN0 [pin D2]
- AIN1 [pin B3]
- AIN2 [pin A3]
- AIN3/BUF\_VREF1V8 [pin B5]
- AIN4/LPF0 [pin B4]
- AIN6 [pin C5]
- AVDD [pin F2]
- AVDD [pin A4]
- AVDD\_REG [pin D8]
- CE0 [pin A7]
- CS [pin F7]
- DE0 [pin B6]
- DGND [pin E4]
- DGND [pin E6]
- DGND [pin E5]
- DNC [pin G8]
- DNC [pin C3]
- DNC [pin D4]
- DNC [pin G1]
- DNC [pin D3]
- DVDD [pin F3]
- DVDD\_REG\_1V8 [pin G3]
- GPIO0 [pin F5]
- GPIO1 [pin D6]
- GPIO2 [pin E1]
- GPIO3 [pin E2]
- GPIO4 [pin G7]
- GPIO5 [pin F6]
- GPIO6 [pin F4]
- GPIO7 [pin G4]
- IOVDD [pin G2]
- MISO [pin E8]
- MOSI [pin E7]
- RC0\_0 [pin C8]
- RC0\_1 [pin B8]
- RC0\_2 [pin C6]
- RCAL0 [pin C1]
- RCAL1 [pin B1]
- RE0 [pin A8]
- SCLK [pin F8]
- SE0 [pin A6]
- VBIAS\_CAP [pin D1]
- VBIAS0 [pin C7]
- VREF\_1V82 [pin A5]
- VREF\_2V5 [pin D7]
- VZERO0 [pin B7]
- XTALI [pin G5]
- XTALO [pin G6]

### U8 — [MPRLS0300YG00001B](https://flux.ai/jecstronic/mprls0300yg00001b~xpa.md)

- Functional Group: Pressure / Contact
- Role: Pressure Sensor
- Role Details: I2C gauge pressure/contact\-quality sensor; not sufficient alone for clinical blood\-pressure claim\.
- Manufacturer Name: Honeywell Sensing and Productivity Solutions
- Manufacturer Part Number: MPRLS0300YG00001B
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Sensor
- Datasheet URL: https://prod\-edam\.honeywell\.com/content/dam/honeywell\-edam/sps/siot/en\-us/products/sensors/pressure\-sensors/board\-mount\-pressure\-sensors/micropressure\-mpr\-series/documents/sps\-siot\-mpr\-series\-datasheet\-32332628\-ciid\-172626\.pdf

**Pins:**
- EOC [pin 8]
- MISO [pin 7]
- MOSI/SDA [pin 2]
- NC [pin 5]
- NC [pin 11]
- RES [pin 9]
- SCL/SCLK [pin 3]
- SS [pin 1]
- VDD [pin 12]
- VO\- [pin 6]
- VO\+ [pin 4]
- VSS [pin 10]

### U9 — [KX022\-1020](https://flux.ai/kicad-part-library/kx022-1020~cg.md)

- Datasheet URL: https://kionixfs\.azureedge\.net/en/datasheet/KX022\-1020%20Specifications%20Rev%2012\.0\.pdf
- Manufacturer Name: Texas Instruments Inc\.
- Manufacturer Part Number: KX022\-1020
- Role Details: I2C/SPI motion data for artifact rejection and wear\-state detection\.
- Role: 3\-Axis Accelerometer
- Functional Group: Motion Sensing
- Package or Case Code: LGA\-12\_2x2mm\_P0\.5mm

**Pins:**
- \~\{CS\} [pin 10]
- GND [pin 9]
- INT1 [pin 5]
- INT2 [pin 6]
- IO\_VDD [pin 3]
- NC [pin 11]
- SCLK/SCL [pin 12]
- SDI/SDA [pin 2]
- SDO/ADDR [pin 1]
- TRIG [pin 4]
- VDD [pin 7]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/gnsk27/neura\-vital\-patch\~er](https://flux.ai/gnsk27/neura-vital-patch~er).*

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*Generated from [https://flux\.ai/gnsk27/neura\-vital\-patch\~er](https://flux.ai/gnsk27/neura-vital-patch~er)*