CMOS switches save over GaAs alternatives

CMOS 4 x 2 matrix HF switches are comparable in performance to GaAs switches at lower cost and in smaller packages.

Three new CMOS 4 x 2 matrix HF switches from NEC Electronics are comparable in performance to GaAs switches at lower cost and in smaller packages.

All three devices can be used in the frequency range from 250 to 2150MHz.

The isolation parameters range from 35dBm (0.25 to 0.95GHz) for the uPD5715GR and uPD5716GR to 42dBm (0.25 to 2.15GHz) for the uPD5720K.

Insertion loss is specified at 6.7 or 6.9dBm (depending on device type).

An additional 4bit decoder was integrated in the uPD5720K HF switch.

By means of this decoder, four SPDT switches can be saved by 8 x 2 multi-switch circuits.

The possibility to construct multi-switches on only two levels provides the user with a significant space advantage compared with a traditional design with pin diodes.

The CMOS 4 x 2 matrix HF switches uPD5716GR and uPD5720K, require 5V supply voltage; the uPD5715GR requires 3.3V and all three are designed for an operating ambient temperature range from -40 to +85C, The uPD5715GR and uPD5716GR devices are available in a Pb-free 16-pin thermal enhanced thin shrink small outline package (HTSSOP); the uPD5720K HF switch is in a 20-pin quad flat no-lead (QFN) package.

Samples and product literature for the uPD5715GR, uPD5716GR and uPD5720K CMOS 4 x 2 matrix HF switches are available from Gleichmann Sunrise.

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