1993_Motorola_Linear_Interface_ICs_Vol_2.pdf
1993_Motorola_Linear_Interface_ICs_Vol_2.pdf
1993_Motorola_Linear_Interface_ICs_Vol_2.pdf
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COMPONENT SUPPLIERS<br />
QUARTZ CRYSTALS - FREQUENCY CONTROL:<br />
California Crystal Laboratories (800) 333-9825<br />
Fox Electronics (813) 693-0099<br />
International Crystals (405) 236-3741<br />
Standard Crystal Corporation (818) 443-2121<br />
GENERAL COMPONENTS - PROTOTYPE QUANTITIES - ASSEMBLY MATERIAL -<br />
PC BOARD MATERIAL:<br />
Digi-Key Corporation<br />
Radio Shack Division,<br />
Tandy Corporation<br />
(800) 344-4539<br />
(See local telephone directory)<br />
INDUCTORS, COILS, RF TRANSFORMERS, FIXED AND VARIABLE:<br />
CoilCraft (800) 322-COIL<br />
(708) 639-6400<br />
Toko America, Inc.<br />
(708) 297-0070<br />
CERAMIC FILTERS AND RESONATORS, IF FILTERS - AM AND FM TYPES:<br />
muRata Erie (404) 436-1300 (Todd Brown, Harry Moore)<br />
TDK Corporation of America (708) 803-6100<br />
Toko America, Inc. (708) 297-0070<br />
BREADBOARDING<br />
Breadboarding RF or other high speed analog circuits can be a very frustrating process for the newcomer<br />
or even an experienced digital deSigner. Most of these circuits deal with very high gain (100+ dB), very<br />
small signals (less than a few microvolts), or with very high frequencies where a wavelength may be a<br />
fraction of a meter. Once "friendly" 0.1 IlF capacitors may now be inductors due to their parasitic<br />
inductance, and conventional construction methods may yield only circuits that oscillate.<br />
What to avoid (never use these):<br />
- Wire wrap for RF or high frequency breadboards.<br />
- Conventional push-in prototype boards.<br />
- Digital printed protoboards with ground and power supply bus lines.<br />
What to use:<br />
- Carefully laid-out double-sided groundplane PC boards.<br />
- Grid boards with a background plane.<br />
- Single-sided PC layouts with continuous full ground fill.<br />
- High frequency qualified components.<br />
- Adequate decoupling.<br />
You will find recommended PC layouts for most of the communications circuits in this chapter. These<br />
layouts are strongly recommended as starting points for new designs. They will allow you to develop your<br />
own benchmark standard circuit to be used as a standard of comparison during further design iterations.<br />
Many <strong>Motorola</strong> communications <strong>ICs</strong> have supporting development kits which include a PC board. These<br />
boards are meant to provide performance equivalent to the data sheets specifications and are easy to<br />
modify for other uses but these boards, however, are not optimized or intended for production applications.<br />
Contact your <strong>Motorola</strong> sales office or <strong>Motorola</strong> distributor for information on the availability of these<br />
development kits.<br />
MOTOROLA LlNEARIiNTERFACE <strong>ICs</strong> DEVICE DATA<br />
8-182
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