Difference between revisions of "Integrated Circuits"

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== Digital Potentiometers ==
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[[Digital Potentiometers|Digital Potentiometers(AD5204)]]
 
[[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.
 
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.
Line 22: Line 22:
 
'''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.
 
'''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.
 
|-
 
|-
|  
+
|
|-
 
! colspan="2" align="left"| Switching Regulators
 
|-
 
| align="center"| [[Image:MCP1253-ADJ.png|69px]]<br>[[MCP1252/3]]
 
| Extremely Efficient, 120mA Flyback Switching Regulators.
 
|-
 
|}
 
 
 
== Microcontrollers ==
 
 
 
* [[Image:lpc2103.jpg|69px|LPC2103]] [http://www.k9spud.com/arm/lpc2103/ LPC2103] Low cost 70MHz ARM7TDMI-S FLASH Microcontroller from Philips. The  [http://coridiumcorp.com/arm7/ "$49" "Coridium ARMmite"]  does use this chip.
 
* [[Atmel]] AVR 8 bit FLASH microcontrollers
 
* [[Microchip]] PIC 8 bit FLASH microcontrollers
 
* Microchip dsPIC 16 bit FLASH microcontrollers ( [[DsPIC30F 5011 Development Board]] )
 
* Cypress PSoC 8 bit FLASH microcontrollers
 
 
 
''I've written a little about the various kinds of microcontrollers at [http://en.wikibooks.org/wiki/Embedded_Systems/Particular_Microprocessors Wikibooks: Embedded Systems]. --[[User:DavidCary|DavidCary]] 06:15, 10 March 2007 (PST)''
 
 
 
== Op Amps ==
 
 
 
Op amps and instrumentation amps.
 
 
 
[[op amp]]s: great for amplifying weak signals from [[sensors]] to a more useful level. Also used in filters, integrators, etc.
 
* [[LT1168|LT1168 Programmable-Gain Precision Instrumentation Amplifier]]  - Low Power, Single Resistor Gain Programmable, Precision Instrumentation Amplifier
 
* [[LT1114|LT1114 Low Power Precision OP-Amps]] are used for amplification and filtering of the signal - Dual/Quad Low Power Precision, Picoamp Input Op Amps
 
* [http://en.wikibooks.org/wiki/Electronics/Op-Amps 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."''
 
* [http://ciphersbyritter.com/RADELECT/PREOPAMP/OPAMPDSN.HTM "Some Op Amp Audio Design Issues"] by Terry Ritter
 
 
 
== logic gates ==
 
 
 
* NAND gate: [http://www.coprolite.com/art48.html "Using a NAND Gate for a Set/Reset Latch"] (the 74HC132 Schmitt-trigger quad NAND is better than the 74HC00 quad NAND).
 
* [http://people.freenet.de/dieter.02/alu_4.htm "Multiplexers: the tactical Nuke of Logic Design"] by Dieter Mueller 2004 (74153)
 
 
 
There are hundreds of other specialized logic gates. Here we only list the ones we actually use in some Open Circuit [[Projects|Project]]:
 
 
 
* 74HC595 eight bit shift register with output latch (used for POV display)
 
 
 
== RF ICs/Modules ==
 
 
 
[http://www.linxtechnologies.com/ 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.
 
[[Category:Components]]
 
 
 
== ADC analog to digital converter ==
 
 
 
There are a huge variety of ADCs available.
 
 
 
If you need 10 bits or less of resolution,
 
counter-intuitively,
 
it costs less to buy an ADC plus a microcontroller on one chip
 
than to buy a stand-alone ADC.
 
 
 
* ATTINY13V -- lowest-price chip I know of with at least one 10 bit ADC
 
* ATTINY261 -- lowest $/ADC chip I know of
 
* LPC2101FBD48 -- lowest-price 32-bit microcontroller I know of with at least one internal 10 bit ADC
 
 
 
Many people (*) do EKGs with only 10 bit converters.
 
 
 
The [[Programmable Chip EEG]] might need more bits of resolution.
 
 
 
What low-cost ADC are available with at least 12 bits?
 
* $2.50 MCP3301 has 1 ADC input (13 bits)
 
* $3.50 MCP3302 has 2 ADC input (13 bits)
 
* $3.50 MCP3204 has 4 ADC input (12 bits)
 
* $4 MCP3208 has 8 ADC input (12 bits)
 
* $8 dsPIC30F 2011 microcontroller has 8 ADC inputs (12 bits). See [[dsPIC30F 5011 Development Board]] for details.
 
* $6 CY8C27443 Cypress PSoC microcontroller has 4 ADC inputs (14 bits) -- but what is the sampling rate? Also has 4 DAC outputs (9 bits).
 
 
 
* $56 biosemi used analog devices AD7716: four independent, simultaneous 22 bit ADCs.
 
* [http://www.maxim-ic.com/appnotes.cfm/an_pk/885 the Maxim MAX1460 includes a 16-bit ADC, 12-bit DAC], a programmable gain amp (PGA), temp sensor, and 16-bit processor. (Alas, its program is in unchangeable ROM).
 
* Analog Devices AduC812: 200kHz 12-bit ADC, 12-bit DAC, and flash-based 8051 MCU core.
 
 
 
''I am astonished to discover that (a few) microcontrollers include 12 bit or more ADCs. Are there others? --[[User:DavidCary|DavidCary]] 18:48, 28 August 2007 (PDT)''
 

Revision as of 09:18, 30 October 2007

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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.