LM4890S

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm4890s",
  "title": "LM4890S",
  "brief": "IDCHIP Audio Power OpAmps, MSOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "op-amp-cmp",
    "lm4890s"
  ],
  "component": {
    "mpn": "LM4890S",
    "manufacturer": "IDCHIP",
    "package": "MSOP-8",
    "pin_count": 8,
    "category": "Op-amp/Cmp",
    "subcategory": "Audio Power OpAmps",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/69d3bfc68f71af0ee59ded178ca676e7.pdf",
    "parts": {
      "symbol": "lm4890s.kicad_sym",
      "footprint": "lm4890s.kicad_mod",
      "model_3d": "lm4890s-etched.glb",
      "model_3d_plain": "lm4890s.glb",
      "model_3d_step": "lm4890s-etched.step",
      "model_3d_step_plain": "lm4890s.step",
      "lbr": "lm4890s.lbr"
    },
    "distributor_links": {
      "lcsc": "C329452"
    },
    "pins": [
      {
        "number": "1",
        "name": "SHUTDOWN",
        "type": "input",
        "description": "Active-low shutdown control. Drive high (VIH ≥ 1.2V) for normal operation; drive low (VIL ≤ 0.4V) to place the amplifier into low-power shutdown mode (ISD ≈ 0.1µA typ)."
      },
      {
        "number": "2",
        "name": "BYPASS",
        "type": "passive",
        "description": "Internal common-mode (half-supply) bias bypass node. Connect a bypass capacitor (typically 1µF) from this pin to GND to filter the internal mid-rail reference and improve PSRR / pop suppression."
      },
      {
        "number": "3",
        "name": "+IN",
        "type": "input",
        "description": "Non-inverting analog audio input of the internal amplifier A1. Typically AC-referenced to the BYPASS mid-rail in the standard application."
      },
      {
        "number": "4",
        "name": "-IN",
        "type": "input",
        "description": "Inverting analog audio input. Sets the closed-loop gain via external RIN (typ 20kΩ) and Rf (typ 68kΩ); combines with CIN to form the input high-pass filter fC = 1/(2π·RIN·CIN)."
      },
      {
        "number": "5",
        "name": "VO1",
        "type": "output",
        "description": "BTL speaker output (negative/inverting side of the bridge, VOUT-). Connect one terminal of the 8Ω speaker load between VO1 (pin 5) and VO2 (pin 8). No output coupling capacitor required."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply input, 2.2V to 5.5V operating range (5.5V absolute max). Decouple locally with CS (typ 1µF) to GND."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / supply return. All voltages in the datasheet are referenced to this pin."
      },
      {
        "number": "8",
        "name": "VO2",
        "type": "output",
        "description": "BTL speaker output (positive/non-inverting side of the bridge, VOUT+). Connect the other terminal of the 8Ω speaker load here. No output coupling capacitor required."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/69d3bfc68f71af0ee59ded178ca676e7.pdf",
        "pages": 8,
        "sha256": "a83b352f78b378f3",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.1125,
        -0.975
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "MSOP-8_3x3mm_P0.65mm@sha256:c85207be7edf4b5e",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "lm4890s.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3,
          0.95
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "847c4c5023fe1603fbd36900a5dcc4bd3901ba473f71d42c9a469f0236eaadf3",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm4890s-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          3,
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "845b60fd322ef83a1006220ef51b67084d50b8ad8bf5d10185126dbbef224673",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "IDCHIP",
      "Package": "MSOP-8",
      "Category": "Op-amp/Cmp",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm4890s"
  ],
  "discovery_pitch": "LM4890S (IDCHIP) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm4890s.kicad_sym",
    "lm4890s.kicad_mod",
    "lm4890s.glb",
    "lm4890s.step",
    "lm4890s-etched.step",
    "lm4890s.lbr",
    "docs/hero.png",
    "docs/lm4890s-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "LM4890SS",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-28T16:59:12.303Z"
}