ADS1291IPBSR

{
  "slug": "ads1291ipbsr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Analog Front End (AFE), TQFP-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "data acquisition",
    "ads1291ipbsr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ads1291ipbsr.kicad_sym",
    "ads1291ipbsr.kicad_mod",
    "ads1291ipbsr.glb",
    "ads1291ipbsr.step",
    "ads1291ipbsr.lbr",
    "docs/hero.png",
    "docs/ads1291ipbsr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ads1291ipbsr-hero.glb",
    "ads1291ipbsr-hero.overlay.json"
  ],
  "component": {
    "mpn": "ADS1291IPBSR",
    "manufacturer": "Texas Instruments",
    "package": "TQFP-32(5x5)",
    "pin_count": 32,
    "category": "Data Acquisition",
    "subcategory": "Analog Front End (AFE)",
    "datasheet": "https://www.ti.com/cn/lit/gpn/ads1291",
    "parts": {
      "symbol": "ads1291ipbsr.kicad_sym",
      "footprint": "ads1291ipbsr.kicad_mod",
      "model_3d": "ads1291ipbsr-hero.glb",
      "model_3d_plain": "ads1291ipbsr.glb",
      "model_3d_step": "ads1291ipbsr-etched.step",
      "model_3d_step_plain": "ads1291ipbsr.step",
      "lbr": "ads1291ipbsr.lbr"
    },
    "distributor_links": {
      "lcsc": "C543023",
      "digikey": "ADS1291IPBSR-ND",
      "mouser": "595-ADS1291IPBSR"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T03:21:28Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ADS1291IPBSR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-ADS1291IPBSR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PGA1N",
        "type": "output",
        "description": "PGA1 inverting output."
      },
      {
        "number": "2",
        "name": "PGA1P",
        "type": "output",
        "description": "PGA1 noninverting output."
      },
      {
        "number": "3",
        "name": "IN1N",
        "type": "input",
        "description": "Differential analog negative input 1; connect to AVDD if unused."
      },
      {
        "number": "4",
        "name": "IN1P",
        "type": "input",
        "description": "Differential analog positive input 1; connect to AVDD if unused."
      },
      {
        "number": "5",
        "name": "IN2N",
        "type": "input",
        "description": "Differential analog negative input 2; connect to AVDD if unused."
      },
      {
        "number": "6",
        "name": "IN2P",
        "type": "input",
        "description": "Differential analog positive input 2; connect to AVDD if unused."
      },
      {
        "number": "7",
        "name": "PGA2N",
        "type": "output",
        "description": "PGA2 inverting output."
      },
      {
        "number": "8",
        "name": "PGA2P",
        "type": "output",
        "description": "PGA2 noninverting output."
      },
      {
        "number": "9",
        "name": "VREFP",
        "type": "bidirectional",
        "description": "Positive reference voltage (analog input/output pin)."
      },
      {
        "number": "10",
        "name": "VREFN",
        "type": "input",
        "description": "Negative reference voltage; must be connected to AVSS."
      },
      {
        "number": "11",
        "name": "VCAP1",
        "type": "passive",
        "description": "Analog bypass capacitor connection."
      },
      {
        "number": "12",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog supply, 2.7 V to 5.25 V referenced to AVSS."
      },
      {
        "number": "13",
        "name": "AVSS",
        "type": "power_in",
        "description": "Analog ground; also the required connection for the thermal pad and VREFN."
      },
      {
        "number": "14",
        "name": "CLKSEL",
        "type": "input",
        "description": "Master clock select."
      },
      {
        "number": "15",
        "name": "PWDN/RESET",
        "type": "input",
        "description": "Power-down or system reset, active low."
      },
      {
        "number": "16",
        "name": "START",
        "type": "input",
        "description": "Start conversion."
      },
      {
        "number": "17",
        "name": "CLK",
        "type": "input",
        "description": "Master clock input."
      },
      {
        "number": "18",
        "name": "CS",
        "type": "input",
        "description": "SPI chip select."
      },
      {
        "number": "19",
        "name": "DIN",
        "type": "input",
        "description": "SPI data input."
      },
      {
        "number": "20",
        "name": "SCLK",
        "type": "input",
        "description": "SPI serial clock."
      },
      {
        "number": "21",
        "name": "DOUT",
        "type": "output",
        "description": "SPI data output."
      },
      {
        "number": "22",
        "name": "DRDY",
        "type": "output",
        "description": "Data ready, active low."
      },
      {
        "number": "23",
        "name": "DVDD",
        "type": "power_in",
        "description": "Digital power supply, 1.7 V to 3.6 V referenced to DGND."
      },
      {
        "number": "24",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "25",
        "name": "GPIO2/RCLK2",
        "type": "bidirectional",
        "description": "General-purpose I/O 2, or respiration clock 2 (ADS1292R only)."
      },
      {
        "number": "26",
        "name": "GPIO1/RCLK1",
        "type": "bidirectional",
        "description": "General-purpose I/O 1, or respiration clock 1 (ADS1292R only)."
      },
      {
        "number": "27",
        "name": "VCAP2",
        "type": "passive",
        "description": "Analog bypass capacitor connection."
      },
      {
        "number": "28",
        "name": "RLDINV",
        "type": "input",
        "description": "Right leg drive inverting input; connect to AVDD if not used."
      },
      {
        "number": "29",
        "name": "RLDIN/RLDREF",
        "type": "input",
        "description": "Right leg drive input to MUX or RLD amplifier noninverting input; connect to AVDD if not used."
      },
      {
        "number": "30",
        "name": "RLDOUT",
        "type": "output",
        "description": "Right leg drive analog output."
      },
      {
        "number": "31",
        "name": "RESP_MODP/IN3P",
        "type": "bidirectional",
        "description": "P-side respiration excitation signal (analog output) or auxiliary input 3P (analog input); respiration function is ADS1292R only."
      },
      {
        "number": "32",
        "name": "RESP_MODN/IN3N",
        "type": "bidirectional",
        "description": "N-side respiration excitation signal (analog output) or auxiliary input 3N (analog input); respiration function is ADS1292R only."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The thermal pad on the TQFP-32 package is a power pad with no printed pin number. It must be connect; The pin table covers the whole ADS1291/ADS1292/ADS1292R family. The respiration functions (RESP_MOD,; Pin types for analog and mixed-function pins (VREFP, RESP_MODP/IN3P, RESP_MODN/IN3N, GPIO1/RCLK1, GP"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0874,
        "at": "2026-10-08T03:20:59"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/ads1291",
        "pages": 83,
        "sha256": "82b2aac52bf182df",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 32,
        "described": 32,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ads1291ipbsr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.96,
          6.96,
          1.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "9daebc29f42260700753da2065619a0c66fa88fb68ac06210fb3f077462b72e4",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ads1291ipbsr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.96,
          6.96,
          1.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "e497c13216010f2293db27ee7f87b982f56905caf3b8dec88c892fb2cbe50ca1",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}