关于模拟ic介绍的一篇英文文章

About Analog IC Switches

Analog IC switches are actually integrated circuits (ICs) that will facilitate energy latest to flow when closed and prevent present from flowing when open. They're frequently utilized to interface analog signals to digital controllers. Analog IC switches differ in terms of the range of poles or contacts, as well as the quantity of positions or throws. Popular pole and throw configurations are single-pole, single-throw (SPST); single-pole, double-throw (SPDT); double-pole, single-throw (DPST), and double-pole, double throw (DPDT).<br> SPST switches make or break the connection of the one conductor inside a one branch circuit. They typically have two terminals. SPDT switches also make or break the connection of the solitary conductor, but with either of two other conductors. These switches, which generally have 3 terminals, are commonly utilised in pairs as three-way switches. DPST switches, yet another sort of double-pole device, make or break the connections of two circuit conductors in the one branch circuit. Normally, DPST switches have four terminals. Finally, DPDT switches make or break the connections of two conductors to two separate circuits. These switches typically have six terminals. Performance specifications for Analog IC switches contain maximum resistance, propagation delay, minimum operating latest, power dissipation, and operating ambient temperature. Some devices contain a bilateral feature that enables signals to be transmitted in either direction. Others are radiation tolerant or supply protection against overcurrent and electrostatic discharge (ESD).<br> Analog IC switches that fulfill army requirements (MIL-SPEC) and military standards (MIL-STD) are also accessible. Supply voltages range from -5 V to 5 V. Analog IC switches is offered inside a variety of Analog IC package deal forms. Examples comprise ball grid array (BGA), quad flat deal (QFP), dual in-line program (DIP), and little outline bundle (SOP) BGA places output pins in the solder ball matrix and offers reduced deal size and improved heat dissipation. Variants comprise plastic-ball grid array (PBGA), tape-ball grid array (TBGA), and fine-pitch land grid array (FLGA).<br> QFP devices contain a big range of fine, flexible, gull winged shaped leads. Low-profile quad flat program (LFQP) and thin quad flat package deal (TQFP) are frequent QFP variants. DIPs could be installed in sockets or soldered into holes that extend into the surface of printed circuit boards (PCBs).<br> They're generally made from plastic (PDIP) or ceramic (CDIP).<br> SOP variants consist of modest outline IC (SOIC), shrink modest outline program (SSOP), thin modest outline package deal (TSOP), thin extremely modest outline deal (TVSOP), and little outline flat-leaded package deal with heat sink (HSOF).<br> Smaller outline J-lead (SOJ) can be a typical form of surface-mount packaging. Plastic leaded chip carrier (PLCC) and leadless ceramic chip carrier (LCCC) are other deal forms for  analog ic switches. Selecting IC analog switches requires an analysis of logic families. Transistor-transistor logic (TTL) and related technologies for instance Fairchild advanced Schottky TTL (FAST) use transistors as digital switches. By contrast, emitter coupled logic (ECL) uses transistors to steer recent via gates that compute logical functions. One more logic family, complementary metal-oxide semiconductor (CMOS) uses a combination of p-type and n-type metal-oxide-semiconductor field effect transistors (MOSFET) to implement logic gates and other digital circuits. Logic families for IC analog switches include things like cross-bar switch technology (CBT), gallium arsenide (GaAs), integrated injection logic (and silicon on sapphire).<br> Gunning with transceiver logic (GTL) and gunning with transceiver logic plus (GTLP) are also accessible.

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