AFE4400RHAR

{
  "slug": "afe4400rhar",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Analog Front End (AFE), VQFN-40(6x6). Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "data acquisition",
    "afe4400rhar",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "afe4400rhar.kicad_sym",
    "afe4400rhar.kicad_mod",
    "afe4400rhar.glb",
    "afe4400rhar.step",
    "afe4400rhar.lbr",
    "docs/hero.png",
    "docs/afe4400rhar-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "component": {
    "mpn": "AFE4400RHAR",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-40(6x6)",
    "pin_count": 41,
    "category": "Data Acquisition",
    "subcategory": "Analog Front End (AFE)",
    "datasheet": "https://www.ti.com/cn/lit/gpn/afe4400",
    "parts": {
      "symbol": "afe4400rhar.kicad_sym",
      "footprint": "afe4400rhar.kicad_mod",
      "model_3d": "afe4400rhar-etched.glb",
      "model_3d_plain": "afe4400rhar.glb",
      "model_3d_step": "afe4400rhar-etched.step",
      "model_3d_step_plain": "afe4400rhar.step",
      "lbr": "afe4400rhar.lbr"
    },
    "distributor_links": {
      "lcsc": "C918793"
    },
    "pins": [
      {
        "number": "1",
        "name": "INN",
        "type": "input",
        "description": "Receiver analog input pin, connect to photodiode anode."
      },
      {
        "number": "2",
        "name": "INP",
        "type": "input",
        "description": "Receiver analog input pin, connect to photodiode cathode."
      },
      {
        "number": "3",
        "name": "RX_ANA_GND",
        "type": "power_in",
        "description": "Rx analog ground pin, connect to common board ground."
      },
      {
        "number": "4",
        "name": "VCM",
        "type": "output",
        "description": "Input common-mode voltage output reference; connect 1 kΩ series resistor and 10 nF decoupling capacitor to ground for biasing and shielding."
      },
      {
        "number": "5",
        "name": "DNC",
        "type": "unconnected",
        "description": "Do not connect; leave as open circuit."
      },
      {
        "number": "6",
        "name": "DNC",
        "type": "unconnected",
        "description": "Do not connect; leave as open circuit."
      },
      {
        "number": "7",
        "name": "BG",
        "type": "power_out",
        "description": "Internal bandgap reference voltage output; connect 2.2 µF decoupling capacitor to ground."
      },
      {
        "number": "8",
        "name": "VSS",
        "type": "power_in",
        "description": "Substrate ground pin, connect to common board ground."
      },
      {
        "number": "9",
        "name": "TX_REF",
        "type": "power_out",
        "description": "Transmitter reference voltage output (0.75 V default); connect 2.2 µF decoupling capacitor to ground."
      },
      {
        "number": "10",
        "name": "DNC",
        "type": "unconnected",
        "description": "Do not connect; leave as open circuit."
      },
      {
        "number": "11",
        "name": "TX_CTRL_SUP",
        "type": "power_in",
        "description": "Transmit controller supply pin (3.0 V to 5.25 V); connect 0.1 µF decoupling capacitor to ground."
      },
      {
        "number": "12",
        "name": "LED_DRV_GND",
        "type": "power_in",
        "description": "LED driver ground pin for H-bridge, connect to common board ground."
      },
      {
        "number": "13",
        "name": "LED_DRV_GND",
        "type": "power_in",
        "description": "LED driver ground pin for H-bridge, connect to common board ground."
      },
      {
        "number": "14",
        "name": "TXN",
        "type": "output",
        "description": "LED driver analog output (H-bridge output B); connect to LED."
      },
      {
        "number": "15",
        "name": "TXP",
        "type": "output",
        "description": "LED driver analog output (H-bridge output A); connect to LED."
      },
      {
        "number": "16",
        "name": "LED_DRV_GND",
        "type": "power_in",
        "description": "LED driver ground pin for H-bridge, connect to common board ground."
      },
      {
        "number": "17",
        "name": "LED_DRV_SUP",
        "type": "power_in",
        "description": "LED driver supply pin for H-bridge (3.0 V to 5.25 V), capable of supplying large LED current."
      },
      {
        "number": "18",
        "name": "LED_DRV_SUP",
        "type": "power_in",
        "description": "LED driver supply pin for H-bridge (3.0 V to 5.25 V), capable of supplying large LED current."
      },
      {
        "number": "19",
        "name": "RX_DIG_GND",
        "type": "power_in",
        "description": "Rx digital ground pin, connect to common board ground."
      },
      {
        "number": "20",
        "name": "AFE_PDN",
        "type": "input",
        "description": "AFE power-down input (active low); can be connected to microcontroller port pin."
      },
      {
        "number": "21",
        "name": "DIAG_END",
        "type": "output",
        "description": "Diagnostic completion status output signal; can be connected to microcontroller port pin."
      },
      {
        "number": "22",
        "name": "LED_ALM",
        "type": "output",
        "description": "LED cable fault detection alarm output signal; can be connected to microcontroller port pin."
      },
      {
        "number": "23",
        "name": "PD_ALM",
        "type": "output",
        "description": "Photodiode sensor or cable fault detection alarm output signal; can be connected to microcontroller port pin."
      },
      {
        "number": "24",
        "name": "SCLK",
        "type": "input",
        "description": "SPI serial clock input pin with Schmitt-triggered input."
      },
      {
        "number": "25",
        "name": "SPISOMI",
        "type": "output",
        "description": "SPI serial data output pin (Master In Slave Out / slave output)."
      },
      {
        "number": "26",
        "name": "SPISIMO",
        "type": "input",
        "description": "SPI serial data input pin (Master Out Slave In / slave input)."
      },
      {
        "number": "27",
        "name": "SPISTE",
        "type": "input",
        "description": "SPI serial interface enable (chip select) input pin."
      },
      {
        "number": "28",
        "name": "ADC_RDY",
        "type": "output",
        "description": "ADC conversion completion indicator output signal; can be connected to microcontroller interrupt input."
      },
      {
        "number": "29",
        "name": "RESET",
        "type": "input",
        "description": "AFE reset input (active low); can be connected to microcontroller port pin."
      },
      {
        "number": "30",
        "name": "CLKOUT",
        "type": "output",
        "description": "Buffered 4 MHz output clock from internal crystal oscillator; can be connected to microcontroller clock input."
      },
      {
        "number": "31",
        "name": "RX_DIG_SUP",
        "type": "power_in",
        "description": "Rx digital supply pin (2.0 V to 3.6 V); connect 0.1 µF decoupling capacitor to ground."
      },
      {
        "number": "32",
        "name": "RX_DIG_GND",
        "type": "power_in",
        "description": "Rx digital ground pin, connect to common board ground."
      },
      {
        "number": "33",
        "name": "RX_ANA_SUP",
        "type": "power_in",
        "description": "Rx analog supply pin (2.0 V to 3.6 V); connect 0.1 µF decoupling capacitor to ground."
      },
      {
        "number": "34",
        "name": "DNC",
        "type": "unconnected",
        "description": "Do not connect; leave as open circuit."
      },
      {
        "number": "35",
        "name": "DNC",
        "type": "unconnected",
        "description": "Do not connect; leave as open circuit."
      },
      {
        "number": "36",
        "name": "RX_ANA_GND",
        "type": "power_in",
        "description": "Rx analog ground pin, connect to common board ground."
      },
      {
        "number": "37",
        "name": "XOUT",
        "type": "output",
        "description": "Crystal oscillator output pin; connect external 8 MHz crystal with load capacitor to ground."
      },
      {
        "number": "38",
        "name": "XIN",
        "type": "input",
        "description": "Crystal oscillator input pin; connect external 8 MHz crystal with load capacitor to ground."
      },
      {
        "number": "39",
        "name": "RX_ANA_SUP",
        "type": "power_in",
        "description": "Rx analog supply pin (2.0 V to 3.6 V); connect 0.1 µF decoupling capacitor to ground."
      },
      {
        "number": "40",
        "name": "RX_ANA_GND",
        "type": "power_in",
        "description": "Rx analog ground pin, connect to common board ground."
      },
      {
        "number": "41",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Crystal oscillator pins (XIN/XOUT) may be bidirectional in Pierce oscillator configuration rather th; VCM reference output could alternatively be classified as power_out rather than output, depending on",
          "exposed pad 41 added from the footprint"
        ],
        "pages_sent": 84,
        "cost_usd": 0.7994,
        "at": "2026-09-18T00:12:57"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/afe4400",
        "pages": 84,
        "sha256": "d0befbf8c7df9113",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 41,
        "described": 41,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "afe4400rhar.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          6.0,
          1.0
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "e5b4286c2329085d9ef7f90d5eb5bf41a435241ecc1baaf1383823b6d6a946ae",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "afe4400rhar-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          6.0,
          1.0
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "a669ea37f239070a1926e1e58af470e043b6ac4a9108b8903abe28bab62e16be",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}