BA3123F-E2

{
  "schema_version": 1,
  "type": "component",
  "slug": "ba3123f-e2",
  "title": "BA3123F-E2",
  "brief": "ROHM Audio Power OpAmps, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "BA3123F-E2",
    "manufacturer": "ROHM",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Op-amp/Cmp",
    "subcategory": "Audio Power OpAmps",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/c64124645c6d1566008f4ca827eb627a.pdf",
    "parts": {
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      "footprint": "ba3123f-e2.kicad_mod",
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      "lbr": "ba3123f-e2.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "OUT1",
        "type": "output",
        "description": "Channel 1 audio output. AC-coupled (typ. 4.7 uF electrolytic) to the power amplifier input. Maximum output swing V_OM ~2.0 Vrms at V_CC = 8 V, THD = 0.1 %."
      },
      {
        "number": "2",
        "name": "VM1",
        "type": "passive",
        "description": "Channel 1 common-mode reference / noise-cancel input. External electrolytic capacitor (typ. 4.7 uF) to the source (tape deck/tuner) ground so the op-amp can subtract the car-body noise voltage from IN1. Larger caps here improve low-frequency CMRR (see Figure 10)."
      },
      {
        "number": "3",
        "name": "IN1",
        "type": "input",
        "description": "Channel 1 audio input. AC-coupled (typ. 4.7 uF electrolytic) from the tuner/tape-deck output. Input resistance R_IN typ. 55 kOhm (44-66 kOhm)."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the IC. Tied to the local (power-amplifier / car body) ground; the isolation topology intentionally references the IC ground separately from the source ground."
      },
      {
        "number": "5",
        "name": "IN2",
        "type": "input",
        "description": "Channel 2 audio input. AC-coupled (typ. 4.7 uF electrolytic) from the tuner/tape-deck output. Input resistance R_IN typ. 55 kOhm (44-66 kOhm)."
      },
      {
        "number": "6",
        "name": "VM2",
        "type": "passive",
        "description": "Channel 2 common-mode reference / noise-cancel input. External electrolytic capacitor (typ. 10 uF in the front-page circuit) to the source ground so the op-amp can subtract the car-body noise voltage from IN2. Cap value trades off low-frequency CMRR vs. board area."
      },
      {
        "number": "7",
        "name": "OUT2",
        "type": "output",
        "description": "Channel 2 audio output. AC-coupled (typ. 4.7 uF electrolytic) to the power amplifier input. Maximum output swing V_OM ~2.0 Vrms at V_CC = 8 V, THD = 0.1 %."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply. Recommended operating range 4 V to 18 V (typ. 12 V), absolute maximum 18 V. Quiescent current I_Q typ. 9.0 mA (max 14 mA). Bypass locally to GND."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/c64124645c6d1566008f4ca827eb627a.pdf",
        "pages": 15,
        "sha256": "7d7f8f0e50bbea12",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
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        "checked": "2026-11-03",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "ROHM",
      "Package": "SOP-8",
      "Category": "Op-amp/Cmp",
      "Pins": "8"
    }
  },
  "variants": [
    {
      "mpn": "BA3123F-E2",
      "kind": "packaging"
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  "discovery_triggers": [
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  "discovery_pitch": "BA3123F-E2 (ROHM) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
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  "files": [
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  "updated_at": "2026-09-24T17:28:22.852Z"
}