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Adc – Hardware details

Pinout​

adc pinout diagram
ADC pinout diagram
ℹ️
Pinouts for the 12-bit and the 16-bit ADC are the same!

Pin Details​

Pin MarkingPin NameDescription
VCCPowerSupply voltage (both 5V and 3V3 are supported).
GNDGroundCommon ground for power and signals.
SDADataI2C data line for communication.
SCLClockI2C clock line for communication.
A0-A3InputAnalog input channels.
ALERTOutputAlert pin for the programmable comparator function.
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The ALERT pin functions as an interrupt output for the programmable comparator, triggering when an input voltage exceeds a set threshold. This allows the microcontroller to respond to changes without continuous polling.

Qwiic (formerly easyC)​

EasyC/qwiic cable
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This board is fully Qwiic-compatible! Just plug it into your board using a Qwiic/easyC/STEMMA QT cable and start coding!

Qwiic (formerly easyC) details and specifications

Learn about hardware specifications, compatibility, and usage of the Qwiic connector.

Timing Characteristics​

The timing characteristics of the ADS1015 and ADS1115 are crucial for understanding their performance during analog-to-digital conversion. Key parameters include:

  • Conversion Time:

    • ADS1015: 160 µs (at 3.3 kSPS)
    • ADS1115: 4.92 ms (at 860 SPS)

  • Data Rate:

    • ADS1015: 128 SPS to 3.3 kSPS (programmable)
    • ADS1115: 128 SPS to 860 SPS (programmable)

  • Acquisition Time:

    • ADS1015: 4.9 µs
    • ADS1115: 4.92 ms (due to higher resolution)

Power Consumption​

The ADS1015 and ADS1115 are both designed for low power consumption. The power usage varies depending on the operating mode and data rate:

  • ADS1015 (12-bit resolution):

    • Continuous Conversion Mode: ~150 µA (at a full data rate of 3.3 kSPS)
    • Single-Shot Mode: Current consumption is significantly reduced in single-shot mode due to automatic shutdown after a conversion.

  • ADS1115 (16-bit resolution):

    • Continuous Conversion Mode: ~230 µA (at a full data rate of 860 SPS)
    • Single-Shot Mode: Similar to the ADS1015, the current consumption drops significantly in shutdown mode after a conversion.

Dimensions​

  • Board Dimensions: 22 × 22 mm (0.9 × 0.9 inch)
  • Header Pin Holes: 1.5 mm
  • Screw Holes: Designed for M3 screws (3.2 mm diameter)
  • Soldered boards are LEGO compatible! 🧱

Jumper Details​

ℹ️
Jumper details are the same for 12-bit and 16-bit versions.

This board contains hardware jumpers; see below for their locations and functions:

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JumperDefault StateFunction
JP1NC (Normally closed)Connects PWR LED.
JP2NC (Normally closed)I2C address 0x48 (Default).
JP3NO (Normally open)I2C address 0x39 when closed.
JP4NO (Normally open)I2C address 0x4A when closed.
JP5NO (Normally open)I2C address 0x4B when closed.
⚠️
The ADC should have only one I2C address at a time. Having multiple address jumpers closed at the same time may cause malfunction or damage.

Hardware repository​

Schematics, KiCad files, Gerber files, and more can be found in the GitHub repository:

ADC 12-bit ADS1015 Hardware design

GitHub hardware repository for this product

ADC 16-bit ADS1115 Hardware design

GitHub hardware repository for this product

The hardware repository contains everything you need to understand, modify, or manufacture the board. The different output folders are versioned. You can check which board version you have specifically by finding the version mark on the PCB.

Below is an overview of the available files.

CAD files​

We use KiCad, an open-source PCB design tool. You can open and edit the .kicad_pro project file, which includes both the schematic and PCB layout.

The PANEL files are used internally for production.

Schematic​

The OUTPUTS folder contains the schematic in .pdf format, exported from KiCad.

BOM (Bill of Materials)​

The bill of materials (BOM) is provided in two formats:

  • A standard .csv table, listing all components, part numbers, and values.
  • An interactive BOM (.html) that visually highlights each component on the PCB, making it easy to locate and reference parts.

3D files​

A 3D model of the PCB is available in .step format, allowing you to inspect the board design in CAD software.

Gerber files​

Gerber files are essential for PCB manufacturing, as they contain precise instructions for each layer of the board. The repository includes standard Gerber outputs in a .zip file, such as:

  • Copper layers (.Cu.gbr) – Defines the traces and pads on the board.
  • Solder mask layers (.Mask.gbr) – Specifies the protective solder mask.
  • Silkscreen layers (.Silkscreen.gbr) – Contains text and component markings.
  • Paste layers (.Paste.gbr) – Used for stencil fabrication in SMD assembly.
  • Drill files (.drl) – Provides drilling coordinates for vias and holes.
  • Board outline (.Edge_Cuts.gbr) – Defines the shape of the PCB.
  • Gerber job file (.gbrjob) – Describes the set of Gerber files used for production.

These files are ready for fabrication and can be used in PCB manufacturing.

Compliance​

The Compliance section includes important regulatory and safety documentation for this product. These files ensure compliance with relevant industry standards and legal requirements.

  • CE – Certification document confirming compliance with EU safety, health, and environmental requirements.
  • UKCA – UKCA (UK Conformity Assessed) certification for the UK market.
  • Safety Instructions – Safety guidelines and precautions in English and in German.
  • Info.txt – Contains product details such as SKU, country of origin, HS tariff code, and barcode.