component
ADS1291IRSMT
Public Made by Adomby adom
Texas Instruments Analog Front End (AFEs), VQFN-32(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "ads1291irsmt",
"version": "0.1.0",
"type": "component",
"description": "Texas Instruments Analog Front End (AFEs), VQFN-32(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"data converters",
"ads1291irsmt",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
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"path": "docs/hero.png"
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"files": [
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"viewers/symbol.html",
"viewers/footprint.html",
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],
"component": {
"mpn": "ADS1291IRSMT",
"manufacturer": "Texas Instruments",
"package": "VQFN-32(4x4)",
"pin_count": 33,
"category": "Data Converters",
"subcategory": "Analog Front End (AFEs)",
"datasheet": "https://www.ti.com/lit/ds/symlink/ads1291irsmt.pdf",
"parts": {
"symbol": "ads1291irsmt.kicad_sym",
"footprint": "ads1291irsmt.kicad_mod",
"model_3d": "ads1291irsmt-hero.glb",
"model_3d_plain": "ads1291irsmt-etched.glb",
"model_3d_step": "ads1291irsmt-etched.step",
"model_3d_step_plain": "ads1291irsmt.step",
"lbr": "ads1291irsmt.lbr"
},
"distributor_links": {
"lcsc": "C2651548",
"digikey": "296-35022-2-ND",
"mouser": "595-ADS1291IRSMT"
},
"distributor_check": {
"checked_at": "2026-10-31T06:23:12Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "296-35022-2-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "595-ADS1291IRSMT",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "PGA1N",
"type": "output",
"description": "PGA1 inverting analog output."
},
{
"number": "2",
"name": "PGA1P",
"type": "output",
"description": "PGA1 noninverting analog 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 analog output."
},
{
"number": "8",
"name": "PGA2P",
"type": "output",
"description": "PGA2 noninverting analog output."
},
{
"number": "9",
"name": "VREFP",
"type": "bidirectional",
"description": "Positive reference voltage (analog input/output)."
},
{
"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 relative to AVSS."
},
{
"number": "13",
"name": "AVSS",
"type": "power_in",
"description": "Analog ground."
},
{
"number": "14",
"name": "CLKSEL",
"type": "input",
"description": "Master clock select (digital input)."
},
{
"number": "15",
"name": "PWDN/RESET",
"type": "input",
"description": "Power-down or system reset, active low."
},
{
"number": "16",
"name": "START",
"type": "input",
"description": "Start conversion (digital input)."
},
{
"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 in."
},
{
"number": "20",
"name": "SCLK",
"type": "input",
"description": "SPI clock."
},
{
"number": "21",
"name": "DOUT",
"type": "output",
"description": "SPI data out."
},
{
"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 relative 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)."
},
{
"number": "26",
"name": "GPIO1/RCLK1",
"type": "bidirectional",
"description": "General-purpose I/O 1 or respiration clock 1 (ADS1292R)."
},
{
"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); connect to AVDD if unused."
},
{
"number": "32",
"name": "RESP_MODN/IN3N",
"type": "bidirectional",
"description": "N-side respiration excitation signal (analog output) or auxiliary input 3N (analog input); connect to AVDD if unused."
},
{
"number": "33",
"name": "Thermal Pad",
"type": "power_in",
"description": "Thermal pad; must be connected to AVSS."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-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 has no pin number in the datasheet. I used '33' as a placeholder. Check this against; Pin 9 (VREFP) is listed as 'Analog input/output', so I mapped it to bidirectional. The datasheet onl; The datasheet says to connect unused analog inputs to AVDD (footnote 1). It states this for IN1N, IN"
],
"pages_sent": 10,
"cost_usd": 0.1366,
"at": "2026-10-31T06:22:43"
},
"datasheet": {
"url": "https://www.ti.com/lit/ds/symlink/ads1291irsmt.pdf",
"pages": 79,
"sha256": "d2926c2b261f0606",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 33,
"described": 33,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
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"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
4.0,
4.0,
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],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "7b482a511cdf2cf875c31931f9fea7f745b8dac2ea6203531cd6604f40a290cb",
"checked": "2026-10-31",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "ads1291irsmt-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
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4.0,
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],
"zmin_mm": 0.0,
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"footprint_binding": "identity",
"sha256": "63c2399ef5b76def17c508e935cc119ba4b859346d68f40fa964402d735e2dd3",
"checked": "2026-10-31",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}