CH70120AB5PR

{
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  "type": "component",
  "slug": "ch70120ab5pr",
  "title": "CH70120AB5PR",
  "brief": "COSEMITECH Current Sensors, SOIC-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "sensor",
    "ch70120ab5pr"
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  "component": {
    "mpn": "CH70120AB5PR",
    "manufacturer": "COSEMITECH",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Sensor",
    "subcategory": "Current Sensors",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2205071500_COSEMITECH-CH70120AB5PR_C455297.pdf",
    "parts": {
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      "footprint": "ch70120ab5pr.kicad_mod",
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      "lbr": "ch70120ab5pr.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "IP+",
        "type": "passive",
        "description": "Positive terminal of the internal current-sense copper conduction path (fused with pin 2). Current flowing from IP+ (pins 1,2) into IP− (pins 3,4) yields a positive-slope output. Primary conductor resistance is 0.8 mΩ typical; electrically isolated from the sensor leads by 3000 VRMS."
      },
      {
        "number": "2",
        "name": "IP+",
        "type": "passive",
        "description": "Positive terminal of the internal current-sense copper conduction path (fused with pin 1). Carries the primary current being measured. Primary conductor resistance is 0.8 mΩ typical."
      },
      {
        "number": "3",
        "name": "IP-",
        "type": "passive",
        "description": "Negative terminal of the internal current-sense copper conduction path (fused with pin 4). Return terminal for the primary current being measured. Electrically isolated from the low-voltage sensor leads (pins 5-8)."
      },
      {
        "number": "4",
        "name": "IP-",
        "type": "passive",
        "description": "Negative terminal of the internal current-sense copper conduction path (fused with pin 3). Return terminal for the primary current being measured."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Signal ground reference for the sensor circuitry and the VIOUT output."
      },
      {
        "number": "6",
        "name": "FILTER",
        "type": "passive",
        "description": "External filter-capacitor pin. A capacitor from FILTER to GND forms an RC low-pass with the internal 1.7 kΩ filter resistor to set the output bandwidth and adjust noise/resolution. Typical application uses ~10 nF for a bandwidth reduction, or the pin can be left with the recommended CF value from the electrical table."
      },
      {
        "number": "7",
        "name": "VIOUT",
        "type": "output",
        "description": "Analog output voltage proportional to the sensed primary current. For the CH70120AB5 (bidirectional, ratiometric, 5 V supply), VIOUT = VCC/2 at 0 A with sensitivity 100 mV/A over ±20 A. Recommended load ≥4.7 kΩ; output can swing from VOL (≤0.2 V) to VOH (≥VCC−0.2 V)."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Device power-supply input. Nominal 5 V ±0.5 V for the CH70120AB5 variant (absolute max 6 V). Supply current ICC ≈ 10 mA typical (14 mA max). Decouple with ~0.1 µF to GND close to the pin; VIOUT is ratiometric to this rail."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2205071500_COSEMITECH-CH70120AB5PR_C455297.pdf",
        "pages": 62,
        "sha256": "bc54e9c5ff632dd6",
        "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"
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        "zmin_mm": 0,
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        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "COSEMITECH",
      "Package": "SOIC-8",
      "Category": "Sensor",
      "Pins": "8"
    }
  },
  "variants": [
    {
      "mpn": "CH70120AB5PR",
      "kind": "packaging"
    },
    {
      "mpn": "CH70120AB3PR",
      "kind": "unknown"
    },
    {
      "mpn": "CH70120BB5PR",
      "kind": "unknown"
    },
    {
      "mpn": "CH70120CB3PR",
      "kind": "unknown"
    }
  ],
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  "discovery_pitch": "CH70120AB5PR (COSEMITECH) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
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  "visibility": {
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  "updated_at": "2026-09-24T19:03:36.949Z"
}