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fix(bom): replace MGJ2D121505SC with R2D-0505/R — wrong part (gate driver, not ±5V supply)

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pyr0ball 2026-04-26 21:57:11 -07:00
parent 451b7ee341
commit a5cd544e9d
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hardware/bom/merlin-bci-rev0.csv
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@ -1,7 +1,7 @@
RefDes,Qty,Value / MPN,Package,Description,Notes
U1,1,ADS1299IPAGR,TQFP-64,8-ch 24-bit delta-sigma EEG/ECG ADC,"TI; DVDD 1.8–3.6V, AVDD ±(2.5–5.25V)"
U2,1,ESP32-WROOM-32E (4MB),SMD module (18×25.5mm),"Dual-core 240MHz, WiFi+BT MCU","brainflow CUSTOM_BOARD via WiFi; or use devkit during firmware dev"
U3,1,MGJ2D121505SC,12-SMD SIP,"Isolated DC/DC 5V in → ±5V out, 2W","Murata; patient isolation barrier for AVDD/AVSS supply"
U3,1,R2D-0505/R,SIP-7,"Isolated DC/DC 5V in → ±5V out, 2W","Recom; patient isolation barrier for AVDD/AVSS supply. Alt: Murata MEE1S0505SC. NOTE: MGJ2D121505SC is WRONG — it outputs +15V/−5V (gate driver), not ±5V"
U4,1,REF3325AIDBZR,SOT-23-5,"2.5V precision ref/LDO, 50ppm/°C","TI; AVDD rail (patient side)"
U5,1,TPS60403DBVR,SOT-23-5,"Inverting charge pump −2.5V (AVSS)","TI; no inductor; in from isolated +5V"
U6,1,TLV1117-33DCYR,SOT-223,"3.3V 800mA LDO for DVDD + MCU","Input from isolated +5V rail"

1 RefDes Qty Value / MPN Package Description Notes
2 U1 1 ADS1299IPAGR TQFP-64 8-ch 24-bit delta-sigma EEG/ECG ADC TI; DVDD 1.8–3.6V, AVDD ±(2.5–5.25V)
3 U2 1 ESP32-WROOM-32E (4MB) SMD module (18×25.5mm) Dual-core 240MHz, WiFi+BT MCU brainflow CUSTOM_BOARD via WiFi; or use devkit during firmware dev
4 U3 1 MGJ2D121505SC R2D-0505/R 12-SMD SIP SIP-7 Isolated DC/DC 5V in → ±5V out, 2W Murata; patient isolation barrier for AVDD/AVSS supply Recom; patient isolation barrier for AVDD/AVSS supply. Alt: Murata MEE1S0505SC. NOTE: MGJ2D121505SC is WRONG — it outputs +15V/−5V (gate driver), not ±5V
5 U4 1 REF3325AIDBZR SOT-23-5 2.5V precision ref/LDO, 50ppm/°C TI; AVDD rail (patient side)
6 U5 1 TPS60403DBVR SOT-23-5 Inverting charge pump −2.5V (AVSS) TI; no inductor; in from isolated +5V
7 U6 1 TLV1117-33DCYR SOT-223 3.3V 800mA LDO for DVDD + MCU Input from isolated +5V rail