ADS1299-4PAGR

{
  "schema_version": 1,
  "type": "component",
  "slug": "ads1299-4pagr",
  "title": "ADS1299-4PAGR",
  "brief": "Texas Instruments Analog Front End (AFE), TQFP-64(10x10). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "data acquisition",
    "ads1299-4pagr"
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  "component": {
    "mpn": "ADS1299-4PAGR",
    "manufacturer": "Texas Instruments",
    "package": "TQFP-64(10x10)",
    "pin_count": 64,
    "category": "Data Acquisition",
    "subcategory": "Analog Front End (AFE)",
    "datasheet": "https://www.ti.com/cn/lit/gpn/ads1299-4",
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    "pins": [
      {
        "number": "1",
        "name": "IN8N",
        "type": "input",
        "description": "Differential analog negative input 8. Not used on ADS1299-4 (channels 5-8 are absent on this variant); tie unused analog inputs directly to AVDD."
      },
      {
        "number": "2",
        "name": "IN8P",
        "type": "input",
        "description": "Differential analog positive input 8. Not used on ADS1299-4; tie to AVDD when unused."
      },
      {
        "number": "3",
        "name": "IN7N",
        "type": "input",
        "description": "Differential analog negative input 7. Not used on ADS1299-4; tie to AVDD when unused."
      },
      {
        "number": "4",
        "name": "IN7P",
        "type": "input",
        "description": "Differential analog positive input 7. Not used on ADS1299-4; tie to AVDD when unused."
      },
      {
        "number": "5",
        "name": "IN6N",
        "type": "input",
        "description": "Differential analog negative input 6. Not used on ADS1299-4; tie to AVDD when unused."
      },
      {
        "number": "6",
        "name": "IN6P",
        "type": "input",
        "description": "Differential analog positive input 6. Not used on ADS1299-4; tie to AVDD when unused."
      },
      {
        "number": "7",
        "name": "IN5N",
        "type": "input",
        "description": "Differential analog negative input 5. Not used on ADS1299-4; tie to AVDD when unused."
      },
      {
        "number": "8",
        "name": "IN5P",
        "type": "input",
        "description": "Differential analog positive input 5. Not used on ADS1299-4; tie to AVDD when unused."
      },
      {
        "number": "9",
        "name": "IN4N",
        "type": "input",
        "description": "Differential analog negative input for channel 4. Tie unused inputs directly to AVDD."
      },
      {
        "number": "10",
        "name": "IN4P",
        "type": "input",
        "description": "Differential analog positive input for channel 4."
      },
      {
        "number": "11",
        "name": "IN3N",
        "type": "input",
        "description": "Differential analog negative input for channel 3."
      },
      {
        "number": "12",
        "name": "IN3P",
        "type": "input",
        "description": "Differential analog positive input for channel 3."
      },
      {
        "number": "13",
        "name": "IN2N",
        "type": "input",
        "description": "Differential analog negative input for channel 2."
      },
      {
        "number": "14",
        "name": "IN2P",
        "type": "input",
        "description": "Differential analog positive input for channel 2."
      },
      {
        "number": "15",
        "name": "IN1N",
        "type": "input",
        "description": "Differential analog negative input for channel 1."
      },
      {
        "number": "16",
        "name": "IN1P",
        "type": "input",
        "description": "Differential analog positive input for channel 1."
      },
      {
        "number": "17",
        "name": "SRB1",
        "type": "bidirectional",
        "description": "Patient stimulus, reference, and bias signal 1. Analog input/output for common-signal routing to reference-montage configurations."
      },
      {
        "number": "18",
        "name": "SRB2",
        "type": "bidirectional",
        "description": "Patient stimulus, reference, and bias signal 2."
      },
      {
        "number": "19",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog supply 4.75-5.25 V. Connect a 1-uF bypass capacitor to AVSS."
      },
      {
        "number": "20",
        "name": "AVSS",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "21",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog supply 4.75-5.25 V. Connect a 1-uF bypass capacitor to AVSS."
      },
      {
        "number": "22",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog supply 4.75-5.25 V. Connect a 1-uF bypass capacitor to AVSS."
      },
      {
        "number": "23",
        "name": "AVSS",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "24",
        "name": "VREFP",
        "type": "bidirectional",
        "description": "Positive analog reference voltage input/output (4.5 V typ.). Connect a minimum 10-uF capacitor from VREFP to VREFN."
      },
      {
        "number": "25",
        "name": "VREFN",
        "type": "input",
        "description": "Negative analog reference voltage input (tied to AVSS typically)."
      },
      {
        "number": "26",
        "name": "VCAP4",
        "type": "passive",
        "description": "Analog bypass capacitor pin. Connect a 1-uF capacitor to AVSS."
      },
      {
        "number": "27",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection. Leave as open circuit."
      },
      {
        "number": "28",
        "name": "VCAP1",
        "type": "passive",
        "description": "Analog bypass capacitor pin. Connect a 100-uF capacitor to AVSS."
      },
      {
        "number": "29",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection. Leave as open circuit."
      },
      {
        "number": "30",
        "name": "VCAP2",
        "type": "passive",
        "description": "Analog bypass capacitor pin. Connect a 1-uF capacitor to AVSS."
      },
      {
        "number": "31",
        "name": "RESV1",
        "type": "input",
        "description": "Reserved for future use. Connect directly to DGND."
      },
      {
        "number": "32",
        "name": "AVSS",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "33",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "34",
        "name": "DIN",
        "type": "input",
        "description": "SPI serial data input (MOSI, from host to ADS1299)."
      },
      {
        "number": "35",
        "name": "PWDN",
        "type": "input",
        "description": "Power-down, active low. Drive low to power down the device."
      },
      {
        "number": "36",
        "name": "RESET",
        "type": "input",
        "description": "System reset, active low."
      },
      {
        "number": "37",
        "name": "CLK",
        "type": "input",
        "description": "Master clock input. External-clock frequency 1.5-2.25 MHz (2.048 MHz nom.) when CLKSEL=0."
      },
      {
        "number": "38",
        "name": "START",
        "type": "input",
        "description": "Synchronization signal to start or restart a conversion. Hold high >=2 tCLK to start; also used to synchronize multiple devices."
      },
      {
        "number": "39",
        "name": "CS",
        "type": "input",
        "description": "SPI chip select, active low."
      },
      {
        "number": "40",
        "name": "SCLK",
        "type": "input",
        "description": "SPI serial clock input."
      },
      {
        "number": "41",
        "name": "DAISY_IN",
        "type": "input",
        "description": "Daisy-chain data input for cascading multiple ADS1299 devices on one SPI bus."
      },
      {
        "number": "42",
        "name": "GPIO1",
        "type": "bidirectional",
        "description": "General-purpose input/output pin 1. Connect to DGND with a >=10-kOhm resistor if unused."
      },
      {
        "number": "43",
        "name": "DOUT",
        "type": "output",
        "description": "SPI serial data output (MISO, from ADS1299 to host)."
      },
      {
        "number": "44",
        "name": "GPIO2",
        "type": "bidirectional",
        "description": "General-purpose input/output pin 2. Connect to DGND with a >=10-kOhm resistor if unused."
      },
      {
        "number": "45",
        "name": "GPIO3",
        "type": "bidirectional",
        "description": "General-purpose input/output pin 3. Connect to DGND with a >=10-kOhm resistor if unused."
      },
      {
        "number": "46",
        "name": "GPIO4",
        "type": "bidirectional",
        "description": "General-purpose input/output pin 4. Connect to DGND with a >=10-kOhm resistor if unused."
      },
      {
        "number": "47",
        "name": "DRDY",
        "type": "output",
        "description": "Data-ready, active low. Falls when a new conversion result is available."
      },
      {
        "number": "48",
        "name": "DVDD",
        "type": "power_in",
        "description": "Digital power supply 1.8-3.6 V. Connect a 1-uF bypass capacitor to DGND."
      },
      {
        "number": "49",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "50",
        "name": "DVDD",
        "type": "power_in",
        "description": "Digital power supply 1.8-3.6 V. Connect a 1-uF bypass capacitor to DGND."
      },
      {
        "number": "51",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "52",
        "name": "CLKSEL",
        "type": "input",
        "description": "Master clock select: 0 = external CLK, 1 = internal oscillator. Set through a >=10-kOhm resistor to DVDD or DGND."
      },
      {
        "number": "53",
        "name": "AVSS1",
        "type": "power_in",
        "description": "Analog ground for the charge pump / AVDD1 domain."
      },
      {
        "number": "54",
        "name": "AVDD1",
        "type": "power_in",
        "description": "Analog supply (charge-pump domain). Connect a 1-uF capacitor to AVSS1."
      },
      {
        "number": "55",
        "name": "VCAP3",
        "type": "passive",
        "description": "Analog bypass capacitor pin. Connect parallel 1-uF and 0.1-uF capacitors to AVSS."
      },
      {
        "number": "56",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog supply 4.75-5.25 V. Connect a 1-uF bypass capacitor to AVSS."
      },
      {
        "number": "57",
        "name": "AVSS",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "58",
        "name": "AVSS",
        "type": "power_in",
        "description": "Analog ground for the charge pump."
      },
      {
        "number": "59",
        "name": "AVDD",
        "type": "power_in",
        "description": "Charge-pump analog supply. Connect a 1-uF capacitor to AVSS (pin 58)."
      },
      {
        "number": "60",
        "name": "BIASREF",
        "type": "input",
        "description": "Bias-drive non-inverting input (reference voltage for the bias-drive amplifier)."
      },
      {
        "number": "61",
        "name": "BIASINV",
        "type": "bidirectional",
        "description": "Bias-drive inverting input/output node (for external feedback network of the bias amplifier)."
      },
      {
        "number": "62",
        "name": "BIASIN",
        "type": "input",
        "description": "Bias-drive input to the input MUX. Routes bias signal to any electrode in case the bias electrode falls off."
      },
      {
        "number": "63",
        "name": "BIASOUT",
        "type": "output",
        "description": "Bias-drive output. Provides patient-bias current derived from selected channels."
      },
      {
        "number": "64",
        "name": "RESERVED",
        "type": "unconnected",
        "description": "Reserved for future use. Leave as open circuit."
      }
    ],
    "provenance": {
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      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/ads1299-4",
        "pages": 84,
        "sha256": "459b96d289166ad4",
        "source_tier": "lcsc"
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        "total": 64,
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TQFP-64(10x10)",
      "Category": "Data Acquisition",
      "Pins": "64"
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  "author": {
    "name": "Ray",
    "email": "[email protected]"
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