Peregrine expands integrated-RF-device coverage from DC to X-band

October 08, 2014 // By Graham Prophet
From true DC to X-band, Peregrine Semiconductor says that its latest developments in its UltraCMOS technology enable the intelligent integration of RF, digital and analogue components onto a single die

Peregrine has added two integrated products—a true DC switch and an X-band core chip. Built on its UltraCMOS technology, both products integrate RF, digital and analogue components onto a single chip. While integration has traditionally offered high-volume markets the benefit of lower cost, Peregrine uses intelligent integration to offer performance advantages in high-performance markets. Peregrine's integrated products claim benefits such as configurability, flexibility, reliability, repeatability, ease-of-use, a reduced form factor and enhanced performance.

Low-frequency intelligent integration: a true DC switch

At the lower end of the frequency spectrum, Peregrine says it has set a new standard with the first RF integrated switch to achieve true DC capability. With a frequency range of 0 Hz to 8 GHz, the UltraCMOS True DC switch (PE42020) effectively operates in a previously unobtainable portion of the frequency spectrum. This frequency expansion is paramount to markets that rely on accuracy and precision, such as test and measurement. The True DC SPDT switch features high power handling, 30 dBm at 0 Hz and 36 dBm at 8 GHz, and maintains RF performance and linearity from DC through 8 GHz. Moreover, it can switch DC and AC peak voltages in the range of +10V to -10V at currents of up to 80 mA, a first for this kind of product.

On a single chip, the True DC switch integrates high-performance RF switching, DC tracking (an analogue function), and digital control logic and impedance control (50-Ohm absorptive or open reflective).

An advantage of the True DC switch is efficient switching time. While low-frequency operation typically requires a slow switching time, the True DC switch uses advanced circuitry to remove this dependence, resulting in a 10 µsec switching time, and a 15 µsec settling time which is critical for test-and-measurement applications.

The PE42020 features high-linearity (IIP3) performance of 63 dBm, and port-to-port isolation of 37 dB @ 6 GHz. It supports standard +1.8V and +3.3V control logic and operates