Integrated Circuits

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Revision as of 03:15, 29 June 2007 by 85.25.140.211 (talk)
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Digital Potentiometers

Digital Potentiometers(AD5204) The digital Potentiometers made by analog devices (AD5204) has 255 positions can be adjusted by the microcomputer that can receive commands from the computer. This is a great way for analog circuitry to have digital control. This is a chip with 4 digitally controlled POTs and the pots can be daisy chained to have multiple chips controled by a single SPI interface.


Voltage Regulators

Linear Regulators
LT1528
LT1528
High current, Variable Voltage Regulator
TPS V-Reg
TPS V-Regs
These are 3.3V and 5V LDO, Low-Noise Voltage Regulators. Very small SOT-23 SMD package. 150mA max current. Best used in battery applications.
Main-LM7805.jpg
Basic Voltage Regulators
Variable voltage regulators, set output regulators, we give you the whole breakdown. Perfect for use with an external wall-wart power supply.
UA723CN Symbol.gif
The 723 Voltage Regulator
Precision Voltage Regulator. Can be used as fixed or floating, variable, linear or switching.

NOTE: Only the DIP-14 version (image) has the Vz pin, which is used for negative regulators. The Metal Can and the Flat-Pack do not have enough pins so exclude the Vz.

 
Switching Regulators
MCP1253-ADJ.png
MCP1252/3
Extremely Efficient, 120mA Flyback Switching Regulators.

Microcontrollers

I've written a little about the various kinds of microcontrollers at Wikibooks: Embedded Systems. --DavidCary 06:15, 10 March 2007 (PST)

Op Amps

Op amps and instrumentation amps.

op amps: great for amplifying weak signals from sensors to a more useful level. Also used in filters, integrators, etc.

  • Wikibooks:Op-Amps has a "quick design process" using Daisy's theorem: "The sum of the gains = +1 in a properly-designed op amp circuit."

logic gates

There are hundreds of other specialized logic gates. Here we only list the ones we actually use in some Open Circuit Project:

  • 74HC595 eight bit shift register with output latch (used for POV display)

RF ICs/Modules

Linx Technologies makes several low power RF transmitter/receiver chips. Their range is around 500' - 1000'. They are geared for one way communication only, like keyless entry systems. They also make several serial encoding chips that make the wireless communication more secure/crack proof. Their latest chip, the HS series, is based upon the SkipJack algorithm developed by the NSA.