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Adafruit ADS1115 16-bit ADC breakout (1085, STEMMA QT): 25.4 × 17.78 mm board and mounting holes

What are the Adafruit ADS1115 breakout dimensions and mounting-hole positions? · Modern device · basis: Adafruit's Eagle board file for the ADS1115 STEMMA QT breakout and the JST SH connector datasheet.

Also called: Adafruit 1085, Adafruit ADS1115, ADS1115 STEMMA QT, ads1115 breakout dimensions, ads1115 mounting holes, adafruit 4-channel adc breakout

Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features

length
25.4 mm
width
17.78 mm
height
4.55 mm

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.

Adafruit ADS1115 16-bit ADC breakout (1085, STEMMA QT): 25.4 × 17.78… size chart

holex (mm)y (mm)diameter (mm)
1-10.16-6.352.5
210.16-6.352.5
3-10.166.352.5
410.166.352.5

Mating features

Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.

featureexactmates withfitfiles
Mounting holes4 × Ø2.5 on 20.32 × 12.70M2 screws or standoffsdesignedall
STEMMA QT connectorsJST SH 4-pin, 1.0 pitchSTEMMA QT / Qwiic cablesocketall

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

AdafruitADS1115 16-Bit ADC – 4 Channel with Programmable Gain AmplifierwebPublisher's page; dimensions are facts
Adafruit (GitHub)ADS1X15 Breakout Board PCB fileswebPublisher's page; dimensions are facts
Adafruit LearnAdafruit 4-Channel ADC BreakoutswebPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

adafruit-ads1115-1085Adafruit ADS1115 16-bit ADC breakout (1085, STEMMA QT): 25.4 × 17.78 mm board and mounting holesSTEP · STL
Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.
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Plain text: sheet.txt · JSON: /api/geometry?object=adafruit-ads1115-1085

Adafruit ADS1115 16-bit ADC breakout (1085, STEMMA QT): 25.4 × 17.78 mm board and mounting holes, isometric render of a generated part
Render of adafruit-ads1115-1085 from the free STEP; not to scale.

Fits with

Adafruit STEMMA QT sensor breakouts (BME280, BNO055/085, VL53, SCD-40, AHT20, SHT40, IMUs, light, magnet, RTC…), isometric render of a generated part
Adafruit STEMMA QT sensor breakouts (BME280, BNO055/085, VL53, SCD-40, AHT20, SHT40, IMUs, light, magnet, RTC…)33 sizes★ 33 files
opening
JST SH connector (1.0 mm pitch): wire, ratings, circuits8 sizes★ sheet
2.54 mm pin headers, 1×2 to 2×20, vertical and right-angle, isometric render of a generated part
2.54 mm pin headers, 1×2 to 2×20, vertical and right-angle30 sizes★ 30 files
Threaded standoffs, M2.5 and M3 (hex and round), isometric render of a generated part
Threaded standoffs, M2.5 and M3 (hex and round)2 sizes★ 16 files
Adafruit BME280 breakout (original), isometric render of a generated part
Adafruit BME280 breakout (original)17.78×19.05 mm★ 1 file

Questions

How big is the Adafruit ADS1115 breakout?

25.40 × 17.78 mm (STEMMA QT version), 4.55 mm tall over the connectors.

Where are the mounting holes?

Four Ø2.5 holes on a 20.32 × 12.70 mm rectangle centred on the board.