Dual Channel Instrumentation Amplifier

THIS PRODUCT HAS BEEN RETIRED AND IS NO LONGER PRODUCED

Purpose

To provide an easy way to buffer, amplify, and filter analog signals. This is a common problem in prototyping and laboratory settings where instrumentation is often tested, changed, reconfigured, etc. This instrumentation grade product is built around the INA128 amplifier.

Purchasing

The dual channel instrumentation amplifier is available through Leeman Geophysical by emailing John R. Leeman at kd5wxb@gmail.com.

Project Information

This repository includes all design information, CAD files, PDF CAD output, gerbers, etc.

Additional resources for this project include:

• Bill of Materials (BoM)
• INA128 Datasheet

License

This product is licenced under the CERN Open Hardware License 1.2. The full license is included in this repository.

Hookup Guide

Hookup is self-explanitory, but some basic guidelines and cautions are provided below.

• Apply power and ground to the GND, Vin+, and Vin- terminals. The input voltage should follow the specifications for the voltage regulators fitted on your device. Normally 2-3 V over the regualted voltage is ideal.

• Apply signal to the In+ and In- terminals

• Hookup the output to your device (recorder, process, etc) via the Out+ and Out- terminals

• Note: Regulated power is available, but be mindful of the current pulled by sensors to not exceed the ratings of the on-board voltage regulators.