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New Vishay Siliconix low-voltage analog switches and multiplexers bring improved throughput

Vishay Electronic : 25 April, 2002  (New Product)
A new family of low-voltage analog switches and multiplexers that will serve as high-bandwidth, high-throughput industry-standard devices was announced today by Siliconix incorporated, an 80.4%-owned subsidiary of Vishay Intertechnology.
Intended for precision signal processing applications, the new Vishay Siliconix 'L Series' analog switching devices will be used in networks, DSL modems, test and measurement systems, professional audio and video equipment, and a wide range of communications and computing systems.

The L Series devices are pin and function compatible companions to higher-voltage CMOS industry-standard analog switches and multiplexers. The devices' basic DG-part-number nomenclature allows designers both the flexibility of a recognizable standard and the ability to choose the best part for a given application. For example, a designer familiar with the DG409 for 12-V to 44-V applications may choose to incorporate the DG409L for 12-V down to 3-V applications.

Released today were five L Series monolithic quad SPST analog switches (DG411L, DG412L, DG413L, DG441L, and DG442L), two single SPST analog switches (DG417L and DG418L), a single SPDT analog switch (DG419L), and two precision analog multiplexers: the 8-channel DG408L and the dual 4-channel DG409L. The new L Series analog switches and multiplexers deliver faster, more accurate performance with lower power consumption.

Typical turn-on time for the L Series analog switches is just 20 ns, compared with up to 150 ns for industry-standard versions, while a 3-dB insertion loss at 280 MHz allows higher bandwidth operation. Providing the widest dynamic range with low signal errors and distortion, superior off-isolation performance of -71 dB at 50 MHz virtually eliminates crosstalk.

The DG408L and DG409L multiplexers offer a threefold or better performance improvement compared with the previous-generation DG408 and DG409. Maximum on-resistance in the new devices is reduced to 29 W from 100 W, typical transition time is cut to 30 ns from 160 ns, and turn-on time is lowered by a third - to 38 ns from 115 ns. Off-isolation is -70 dB at 1 MHz.

Allowing designers to take advantage of the power savings of lower supply voltages, devices in the L Series are specified for 2.7-V to 12-V single supplies or 3-V or 6-V dual-supply operation. Maximum on-resistance ranges of only 29 W to 80 W provide low power consumption, while flat performance over the full drain voltage and temperature range provides less variation between signals.

Compared with the standard SO-8 package, these new PowerPAK SO-8 devices deliver at least 21% higher maximum continuous drain current, dissipate at least 61% more power, and feature a 39% lower height profile. Their low thermal resistance enables these new MOSFETs to handle more power or run cooler, taking up less board space and resulting in thinner, less expensive end products.

All 10 devices provide a simple logic interface, break-before-make switching action, ESD protection to 2000 V, and narrow-body SOIC-16 or TSSOP-16 packaging. Samples and production quantities of the L Series analog switches and multiplexers are available now, with lead times of four to six weeks for larger orders.
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