{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "adafruit-ads1115-1085",
 "name": "Adafruit ADS1115 16-bit ADC breakout (1085, STEMMA QT): 25.4 × 17.78 mm board and mounting holes",
 "kind": "modern",
 "category": "Electronic components",
 "group": "Modules, sensors & displays",
 "year": null,
 "question": "What are the Adafruit ADS1115 breakout dimensions and mounting-hole positions?",
 "tags": [
  "adafruit ads1115",
  "ads1115 breakout",
  "16-bit adc board",
  "stemma qt adc",
  "adc breakout holes"
 ],
 "aliases": [
  "Adafruit 1085",
  "Adafruit ADS1115",
  "ADS1115 STEMMA QT",
  "ads1115 breakout dimensions",
  "ads1115 mounting holes",
  "adafruit 4-channel adc breakout"
 ],
 "overall_mm": {
  "length": 25.4,
  "width": 17.78,
  "height": 4.55
 },
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 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/adafruit-ads1115-1085/",
 "sheet_txt": "https://xemstudio.com/objects/adafruit-ads1115-1085/sheet.txt",
 "sheet": {
  "basis": "Adafruit's Eagle board file for the ADS1115 STEMMA QT breakout and the JST SH connector datasheet.",
  "overall_mm": {
   "length": 25.4,
   "width": 17.78,
   "height": 4.55
  },
  "notes": [
   "Datum: board centred on X and Y, bottom on z=0, components up.",
   "Board 25.40 × 17.78 × 1.6 mm with R2.54 corners.",
   "Four Ø2.5 holes at (±10.16, ±6.35): a 20.32 × 12.70 mm pattern.",
   "Two side-entry JST SH 4-pin STEMMA QT connectors, each 4.25 × 6.10 × 2.95, centred at (±10.03, 0), openings facing outward; overall height 4.55.",
   "Not modelled: the two 1×6 headers along the ±Y edges (ship loose) and the ADC chip. The pre-2021 board (27.94 × 17.15, two holes) is a different part.",
   "Exact nominal mm."
  ],
  "table": {
   "columns": [
    "hole",
    "x (mm)",
    "y (mm)",
    "diameter (mm)"
   ],
   "rows": [
    [
     "1",
     -10.16,
     -6.35,
     2.5
    ],
    [
     "2",
     10.16,
     -6.35,
     2.5
    ],
    [
     "3",
     -10.16,
     6.35,
     2.5
    ],
    [
     "4",
     10.16,
     6.35,
     2.5
    ]
   ]
  }
 },
 "sheet_text": "Adafruit ADS1115 16-bit ADC breakout (1085, STEMMA QT): 25.4 × 17.78 mm board and mounting holes — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/adafruit-ads1115-1085/  (sheet CC BY 4.0)\nBasis: Adafruit's Eagle board file for the ADS1115 STEMMA QT breakout and the JST SH connector datasheet.\nCatalog version: 2026-10-20\n\nOverall (mm): length 25.4, width 17.78, height 4.55\n- Datum: board centred on X and Y, bottom on z=0, components up.\n- Board 25.40 × 17.78 × 1.6 mm with R2.54 corners.\n- Four Ø2.5 holes at (±10.16, ±6.35): a 20.32 × 12.70 mm pattern.\n- Two side-entry JST SH 4-pin STEMMA QT connectors, each 4.25 × 6.10 × 2.95, centred at (±10.03, 0), openings facing outward; overall height 4.55.\n- Not modelled: the two 1×6 headers along the ±Y edges (ship loose) and the ADC chip. The pre-2021 board (27.94 × 17.15, two holes) is a different part.\n- Exact nominal mm.\n\nhole  x (mm)  y (mm)  diameter (mm)\n1  -10.16  -6.35  2.5\n2  10.16  -6.35  2.5\n3  -10.16  6.35  2.5\n4  10.16  6.35  2.5\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Adafruit: ADS1115 16-Bit ADC – 4 Channel with Programmable Gain Amplifier — web — Publisher's page; dimensions are facts — https://www.adafruit.com/product/1085\n- Adafruit (GitHub): ADS1X15 Breakout Board PCB files — web — Publisher's page; dimensions are facts — https://github.com/adafruit/ADS1X15-Breakout-Board-PCBs\n- Adafruit Learn: Adafruit 4-Channel ADC Breakouts — web — Publisher's page; dimensions are facts — https://learn.adafruit.com/adafruit-4-channel-adc-breakouts\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/adafruit-ads1115-1085/index.json\nAPI: https://xemstudio.com/api/geometry?object=adafruit-ads1115-1085\n",
 "sources": [
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   "publisher": "Adafruit",
   "title": "ADS1115 16-Bit ADC – 4 Channel with Programmable Gain Amplifier",
   "url": "https://www.adafruit.com/product/1085",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
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  {
   "publisher": "Adafruit (GitHub)",
   "title": "ADS1X15 Breakout Board PCB files",
   "url": "https://github.com/adafruit/ADS1X15-Breakout-Board-PCBs",
   "formats": [
    "web"
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   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
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   "publisher": "Adafruit Learn",
   "title": "Adafruit 4-Channel ADC Breakouts",
   "url": "https://learn.adafruit.com/adafruit-4-channel-adc-breakouts",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
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  }
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 "related": [
  "adafruit-stemma-qt-breakouts",
  "jst-sh-connector",
  "pin-headers-2.54mm",
  "threaded-standoffs-metric",
  "adafruit-bme280-breakout-original"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no tolerance added)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no tolerance added. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn. Typical accuracy by process and ISO 286 fits: https://xemstudio.com/tolerances/",
 "mating": [
  {
   "feature": "Mounting holes",
   "exact": "4 × Ø2.5 on 20.32 × 12.70",
   "mates": "M2 screws or standoffs",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "STEMMA QT connectors",
   "exact": "JST SH 4-pin, 1.0 pitch",
   "mates": "STEMMA QT / Qwiic cable",
   "fit": "socket",
   "files": "all"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. ISO 286 equivalent: H7/p6 (locational interference) or tighter.",
  "slide": "assembles by hand and is held by a grub, pinch or clamp: shaft in a hub, rod in a socket, spigot in a bore. ISO 286 equivalent: H7/g6 or H7/h6.",
  "run": "turns or slides in use: pin in a link, rod through a guide. ISO 286 equivalent: H8/f7 (close running).",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. ISO 286 equivalent: H9/d9 (free running) or looser.",
  "clamp": "split part that closes on the mating part with screws: make it at size.",
  "designed": "a gap that is part of the design (piston fit option, displacer gap, air gap): do not change."
 },
 "faq": [
  {
   "q": "How big is the Adafruit ADS1115 breakout?",
   "a": "25.40 × 17.78 mm (STEMMA QT version), 4.55 mm tall over the connectors."
  },
  {
   "q": "Where are the mounting holes?",
   "a": "Four Ø2.5 holes on a 20.32 × 12.70 mm rectangle centred on the board."
  }
 ],
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   "note": "Adafruit ADS1115 16-bit ADC breakout (1085, STEMMA QT): 25.4 × 17.78 mm board and mounting holes"
  }
 ],
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