1-Channel 12-Bit Analog to Digital Converter

  • 1-Channel 12-Bit Analog to Digital Conversion
  • Single-Ended 0 to 5VDC
  • 188.9K Samples per Second
  • Up to 9 Devices per I2C Port
  • 0x50 I2C Start Address


The ADC121C021 Analog-to-Digital Converter (ADC), from Texas Instruments, is one of our favorites. We use it in many of our analog I2C mini modules, including our very popular gas sensors.

The ADC121C021 offers 12-bits of resolution across a 0 - 5VDC voltage range. With over 188,000 samples per second, this little ADC is fast!

Perhaps our favorite feature is the addressing system. This chip supports floating addressing--so you can share up 9 devices on a single I2C port with just 2 jumpers. We packaged this device into a convenient I2C Mini Module footprint, making it easy to plug in and use.

This I2C Mini Module include open holes for Pull-Up and Pull-Down resistors for applications that require input bias.

This little ADC is suitable for just about any analog-to-digital conversion application and will likely be the focus of many of our future products for many years to come.


This is a general purpose I²C device compatible with all computing platforms and IoT technologies, including Raspberry Pi, BeagleBone, Arduino, Particle, BridgeX5, and many more.  All ControlEverything.com devices support a strict +5V I²C Bus standard.

Arduino Nano and Micro Interfaces:
Plug this Device into the Arduino Nano I²C Shield
Plug this Device into any Arduino Nano Master Device
Plug this Device into any Arduino Micro Master Device
Plug this Device into the Arduino Uno Interface Adapter

ESP8266 IoT Interfaces:
Use our ESP8266 Module and the PEI2C Interface Adapter
Use our ESP8266 Adapters for Adafruit and Huzzah

Onion Omega 1 & 2 IoT Interface:
Use our Onion Omega Adapters

Raspberry Pi Interfaces:
Use the Raspberry Pi I²C Interface Adapter
Use the Raspberry Pi 2/3 I²C Interface Adapter
Use the Raspberry Pi Zero I²C Interface Adapter

Particle IoT Interfaces: 
Plug this Device into the Particle Photon I²C Shield
Use as Expansion for any Particle Photon Device
Use as Expansion for any Particle Electron Device
Note: All devices above are compatible with Bluz Bluetooth Interface

Pycom IoT Interface:
Plug this Device into the WiPy I²C Shield

BeagleBone Interface:
Use the BeagleBone I²C Interface Adapter

Windows 8/10 PC Interface:
Use the Bridge Series Controller

Mini Modules

Our mini modules provide a standardized footprint to simplify the design of your project, and allow for a smaller form factor without sacrificing the plug-and-play  ease of use that our product line affords.

All I²C Mini Modules are designed to operate at 5VDC. Using a convenient quick connect 4-Pin plug, devices can be daisy-chained onto the I²C Bus, eliminating the need for soldering. Simply plug together the devices you need for your next automation application.

Pull-up resistors are included with all ControlEverything.com master devices. If you are wiring in your own I²C port, on-board 4.7K jumper-selectable pull-up resistors are available for convenience purposes.

All mini modules are 50.8 x 31.75 mm.


Dimensions: 50.80000 x 31.75000 x 12.12000 mm
Mechanical drawing


Code Libraries

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