Week #13: (11/25-27) SNR, AD524, Comparators, Temp Sensor

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rjagodowski
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Joined: Fri Sep 04, 2015 6:59 pm

Week #13: (11/25-27) SNR, AD524, Comparators, Temp Sensor

Post by rjagodowski »

This week we'll finish up our discussion of CMRR and SNR from Week #10.

We will also discuss an Instrumentation Amplifier on a chip, the Analog Devices AD524. We'll investigate the key specs on the data sheet, the pin-programmable gain options as well as the user-settable gain options.

Sample Programmable Gain circuits are shown on Page 16. On Page 16, note there is a typo on the Gain formula. The formula in the upper right of the page should be: RG=40,000/(G-1) .

We'll also discuss the Sense and the Reference Terminals on page 18.

AD524_short.pdf
This is the shorter version (5 pages) of the AD524 data sheet and is the one distributed in class.
(300.13 KiB) Downloaded 158 times
AD524.pdf
This is the FULL document and is 28 pages long. The shorter 5 page version was distributed in class.
(548.25 KiB) Downloaded 161 times

LM34 Precision Temperature Sensor Data Sheet:
lm34_datasheet.pdf
(1.2 MiB) Downloaded 154 times

Then we begin the discussion on Precision Comparators:

Op-Amp Comparators from www.electronics-tutorials.ws
.

This is a great video on Comparator Applications from Texas Instruments.

Before we discuss the Precision Comparators, we need to spend a few minutes introducing Open Collector Outputs, in this case, from EvilMadScientist.com

Comparators: LM-339 Data Sheet or here as a pdf:
LM339 Datasheet.PDF
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This is the website that inspired this week's lab: ermicroblog. There are some typos on the schematics and their description of the circuit operation is misleading, which will be pointed out in class and when we build these circuits in lab. Actually, aside from the circuits, this site isn't so great. LOL

Voltage Comparator Information and Circuits.

A comparator summary from bristolwatch.com.

Here's the link to the Week #14 Comparator/Temp. Sensor Lab .

If you missed it, here is the set of Gain Calculation Problems originally posted and distributed back in Week #10.
Gain Calculation Problems v15.1.pdf
(65.29 KiB) Downloaded 140 times
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