Linear Technology LTC2485 24-Bit Differential ADC Quick Start Guide

About this manual

This guide explains how to set up and use the Demonstration Circuit 956 to evaluate the LTC2485 ADC. It includes hardware connections, software setup, and basic experiments to test input noise, common mode rejection, and normal mode rejection. The board connects to a DC590 USB Serial Controller for data acquisition and control.

The guide provides step-by-step instructions for connecting the board, running evaluation software, and performing experiments to verify the ADC’s performance characteristics such as 600nV RMS noise and 140dB common mode rejection.

What's inside

• Quick Start Procedure
• Hardware Set-Up
• Connection to DC590 Serial Controller
• Analog Connections
• Experiments
• Input Noise
• Common Mode Rejection
• Bipolar Symmetry
• Input Normal Mode Rejection

Specifications

Frequently asked questions

What is the resolution of the LTC2485?

The resolution is 24 bits.

What is the input common mode rejection of the LTC2485?

The input common mode rejection is 140dB.

How do I connect the DC956 board to the DC590 controller?

Connect using the supplied 14-conductor ribbon cable.

What software is required to run the evaluation?

Use the evaluation software supplied with DC590 or downloaded from http://www.linear.com/software.