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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html lang="en"><head><title>Analog IO Ranges - Universal Driver Documentation</title><meta http-equiv="Content-type" content="text/html; charset=iso-8859-1"><meta name="robots" content="index,follow"><link rel="shortcut icon" href="/favicon.ico"><link rel="stylesheet" href="/dscud/style/wikiprintable.css"><script type="text/javascript" src="/dscud/style/wikibits.js"></script><style type='text/css'><!--a.new, #quickbar a.new { color: #CC2200; }#quickbar { position: absolute; top: 4px; left: 4px; border-right: 1px solid gray; }#article { margin-left: 152px; margin-right: 4px; }//--></style></head><body bgcolor='#FFFFFF'><div class='titlebox'><h1 class='pagetitle'>Analog IO Ranges</h1><span class='subtitle'>Universal Driver Documentation</span></div><div class='navbox'><a href="manual_Main_Page.html" class='printable' title ="Main Page">Main Page</a> || <a href="manual_Table_of_Contents.html" class='printable' title ="Table of Contents">Table_of_Contents</a> || <a href="http://www.diamondsystems.com/">Diamond Systems Website</a></div></div><div class='bodytext'>Several of the boards support programmable input ranges and resolution. For these boards, a table has been included detailing all possible A/D range settings. Here is a detailed description of the data in the tables:
<p>
<table cellpadding=10><tr ><TD valign=top><strong>Code</strong></TD><TD>This is the code for the particular input range</TD></tr><tr ><TD valign=top><strong>Range:</strong></TD><TD>This bit selects the board's A/D positive full-scale voltage range; 0 = 5V, 1 = 10V. Do not confuse this term with the board's "input range."</TD></tr><tr ><TD valign=top><strong>ADBU</strong></TD><TD>This bit selects the board's A/D bipolar/unipolar setting; 0 = bipolar, 1 = unipolar.</TD></tr><tr ><TD valign=top><strong>G1, G0</strong></TD><TD>These bits select the board's A/D gain setting. The gain settings and their respective control bits are as follows:<p>
<table cellpadding=8 cellspacing=0><tr ><TD> <strong>G1</strong></TD><TD> <strong>G0</strong></TD><TD> <strong>Gain</strong></TD></tr><tr ><TD align=center> 0</TD><TD align=center> 0</TD><TD align=center> 1</TD></tr><tr ><TD align=center> 0</TD><TD align=center> 1</TD><TD align=center> 2</TD></tr><tr ><TD align=center> 1</TD><TD align=center> 0</TD><TD align=center> 4</TD></tr><tr ><TD align=center> 1</TD><TD align=center> 1</TD><TD align=center> 8</TD></tr></table><p>
</TD></tr><tr ><TD valign=top><strong>Input Range</strong></TD><TD>This column lists the input range resulting from the particular configuration of control bits.</TD></tr><tr ><TD valign=top><strong>Resolution</strong></TD><TD>This column lists the voltage resolution resulting from the particular configuration of control bits. The resolution is equal to the smallest change in input voltage detectable by the A/D circuit. This smallest change results in a change in A/D code of 1 least significant bit, or LSB.<p>
The resolution is equal to the total voltage range (maximum input voltage - minimum input voltage) divided by the number of possible A/D codes (2n where n is the number of bits in the A/D converter). For an input range of ⌨️ 快捷键说明
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