8-Channel Analog to Digital Converter 12-Bit + 8-Channel Digital IO +8-Channel Open Collector with I2C Interface

This multi-function I2C device includes a MCP23017 configured for 8-Channels of Open Collector Output (Up to 100ma per Channel) and 8-Bit General Purpose Programmable Input and Outputs. Open Collector outputs can be used to directly control mechanical relays or other low-power devices. On-Board LEDs indicate the On/Off status of each Open Collector output.

This device also includes a ADS7828 8-channel analog-to-digital converter (ADC) with 12-bit resolution per channel. This device contains a sample-and-hold amplifier that captures and locks the analog signal value at a constant level for a specific period of time.  The ADS7828 also features an internal, asynchronous circuit–meaning it does not follow a clock signal and the state of the circuit changes as soon as the input changes. The device has a 50kHz sampling rate and its I2C interface supports standard, fast, and high speed modes.

On-Board address jumpers allow you to define the start address range of each I2C chip. Up to 4 ADS7828 chips are supported per I2C port and up to 8 MCP23017 chips are supported per I2C port.  All analog and digital Inputs are designed for 5V operation (higher voltages will damage the on-board chip set).  May be powered by the I2C bus or powered externally (jumper-selectable).

What is the NCD I2C Interface?

NCD is the creator of plug and play modular hardware using the NCD I2C Interface connector standard.  NCD I2C devices allow you to chain together several devices on the I2C bus, and communicate to each device individually at high speed (subject to the limitations of I2C).  The NCD I2C Interface uses a standard 4-Pin I2C Input and I2C Output connector.  NCD I2C devices communicate 5V I2C data and provides 5V DC power through this connector.  NCD I2C devices use standard I2C communications for all data transport, which is supported by nearly every microcontroller in production today.  The NCD I2C Interface is strictly a 5V standard, which is ideal for transport across longer cables.  NCD I2C devices always include a 6″ (152mm) 4-conductor I2C cable.  NCD I2C Mini Modules always include a 3″ (76mm) 4-conductor I2C cable.  Cables and connectors are available separately for designers who would like to include their own NCD I2C Interface into their designs.

Plug and Play Connectivity

NCD I2C devices will plug in to any available NCD I2C Output.  This includes just about everything we make in the NCD IoT Category, including all NCD IoT devices.  We also manufacture a wide range of I2C adapters that make it easy to plug NCD I2C Devices directly into most computing platforms.  The NCD I2C Interface adapters are available for Arduino, Banana Pi, BeagleBone, Bluz, C.H.I.P., ESP8266, Onion Omega, Particle Photon and Electron, PyCom, Raspberry Pi, 2, 3, and Zero, and Windows.  We are always working to add new platform support for NCD I2C devices.  NCD I2C Interface devices are compatible with just about everything in the microcontroller industry.

Unlimited I2C Expansion

Based on our plug-and-play I2C interface standard, all NCD I2C devices are equipped with a I2C output port, making it easy to expand to a wide variety of sensors, current monitors, relay controllers, PWM controllers, and much more!  We are always designing new expansions for our modular plug-and-play I2C framework.  We are dedicated to building a product line of interconnected devices to simplify all forms of automation.  Re-use or upgrade your hardware in seconds by selecting the modules that best fit your needs, and chaining them together using the included I2C expansion cables!

Powering NCD I2C Interface Devices

Some NCD I2C devices require a external power supply, others may be powered through the 4-Pin I2C bus connector at 5VDC, and other devices are jumper selectable between external and I2C bus power.  All I2C mini modules are powered through the 5V I2C bus connector, greatly simplifying connectivity.

Features

• 8-Channel 12-Bit Analog to Digital Converter
• 8-Channel Programmable Open Collector Outputs
• 8-Channel Programmable General Purpose TTL IO
• I2C Input and Pass-Through Connector
• Screw Terminal Access to All Inputs and Outputs