ADS1231IDR

{
  "schema_version": 1,
  "type": "component",
  "slug": "ads1231idr",
  "title": "ADS1231IDR",
  "brief": "Texas Instruments Analog To Digital Converters (ADC), SOIC-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "data acquisition",
    "ads1231idr"
  ],
  "component": {
    "mpn": "ADS1231IDR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Data Acquisition",
    "subcategory": "Analog To Digital Converters (ADC)",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ads1231.pdf",
    "parts": {
      "symbol": "ads1231idr.kicad_sym",
      "footprint": "ads1231idr.kicad_mod",
      "model_3d": "ads1231idr-etched.glb",
      "model_3d_plain": "ads1231idr.glb",
      "model_3d_step": "ads1231idr-etched.step",
      "model_3d_step_plain": "ads1231idr.step",
      "lbr": "ads1231idr.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "DVDD",
        "type": "power_in",
        "description": "Digital power supply. 3 V to 5.3 V. Decouple to GND close to the pin."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground for digital and analog supplies (shared with pin 11)."
      },
      {
        "number": "3",
        "name": "CLKIN",
        "type": "input",
        "description": "External clock input, typically 4.9152 MHz (1-6 MHz). Tie low to activate the internal oscillator."
      },
      {
        "number": "4",
        "name": "SPEED",
        "type": "input",
        "description": "Data-rate select input. Logic 0 selects 10 SPS; logic 1 selects 80 SPS."
      },
      {
        "number": "5",
        "name": "CAP",
        "type": "passive",
        "description": "Gain-amplifier bypass capacitor connection. Connect an external bypass capacitor between the two CAP pins (pins 5 and 6)."
      },
      {
        "number": "6",
        "name": "CAP",
        "type": "passive",
        "description": "Gain-amplifier bypass capacitor connection. Second terminal of the PGA bypass capacitor."
      },
      {
        "number": "7",
        "name": "AINP",
        "type": "input",
        "description": "Positive analog input to the PGA/ADC. Common-mode range GND+1.5 V to AVDD-1.5 V; full-scale differential input +/-0.5*VREF/128."
      },
      {
        "number": "8",
        "name": "AINN",
        "type": "input",
        "description": "Negative analog input to the PGA/ADC. Paired with AINP as the bridge-sensor differential input."
      },
      {
        "number": "9",
        "name": "VREFN",
        "type": "input",
        "description": "Negative voltage reference input. Range GND-0.1 V to VREFP-1.5 V."
      },
      {
        "number": "10",
        "name": "VREFP",
        "type": "input",
        "description": "Positive voltage reference input. Range VREFN+1.5 V to AVDD+0.1 V (external reference up to 5 V for ratiometric measurements)."
      },
      {
        "number": "11",
        "name": "GND",
        "type": "power_in",
        "description": "Ground for digital and analog supplies (shared with pin 2)."
      },
      {
        "number": "12",
        "name": "SW",
        "type": "output",
        "description": "Low-side power switch for the bridge sensor. Ron typ 3.5 ohm at AVDD=5V; max continuous switch current 30 mA."
      },
      {
        "number": "13",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply. 3 V to 5.3 V. Decouple to GND close to the pin."
      },
      {
        "number": "14",
        "name": "PDWN",
        "type": "input",
        "description": "Power-down (active-low). Holding this pin low powers down the entire converter and resets the ADC."
      },
      {
        "number": "15",
        "name": "SCLK",
        "type": "input",
        "description": "Serial clock: clocks out data on the rising edge. Also used to initiate Standby mode. Max 5 MHz."
      },
      {
        "number": "16",
        "name": "DRDY/DOUT",
        "type": "output",
        "description": "Dual-purpose output. Data ready: indicates valid data by going low. Data output: outputs data MSB-first on the first rising edge of SCLK."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/ads1231.pdf",
        "pages": 24,
        "sha256": "37a2ab763b8d0e7d",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ads1231idr-etched.step",
        "role": "eda",
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        "zmin_mm": -0.0,
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        "sha256": "63a106967c5a2306cb7ae12b180c798fe6320d7a595e8917c61f11b74831bf9e",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-16",
      "Category": "Data Acquisition",
      "Pins": "16"
    }
  },
  "variants": [
    {
      "mpn": "ADS1231IDR",
      "kind": "packaging"
    }
  ],
  "sections": [
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  "discovery_triggers": [
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  "discovery_pitch": "ADS1231IDR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
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  "files": [
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  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T15:57:30.141Z"
}