Peregrine Semiconductor Corporation today released three new 7-bit UltraCMOS™ Digital Step Attenuators to complement its popular 50-Ohm DSA line. Building on their high-performance predecessors, along with flexible Serial and Parallel interface logic these new HaRP™-enhanced devices also offer an unprecedented serial-addressable control interface which allows the user to control up to 8 different DSAs using a common 3-wire interface bus. The new trio offers highly flexible attenuation options by covering a 31.75 dB attenuation range in 0.25 dB, 0.5 dB, or 1.0 dB steps.
The PE43701, PE42702 and PE43703 DSAs offer best-in-class linearity with and Input IP3 of +57 dBm, outstanding attenuation accuracy of +/- 0.20 + 2% of attenuation setting at 3 GHz, and low Insertion Loss of 1.6 dB (typical). As with all UltraCMOS silicon-on-sapphire RFICs, there is no gate lag to settling time nor phase shift, making them ideal for next-generation communication systems such as cellular base stations, repeaters, femtocells and power amplifier distortion cancelling loops. In particular, the PE43703 DSA delivers unprecedented settling time making it ideal for test and measurement applications and a perfect complement to Peregrine’s recently introduced PE42552 RF Switch.
These new 50-Ohm DSAs have an operating frequency range of near DC up to 6 GHz, with exceptional low-frequency performance, superior noise immunity and outstanding ESD tolerance of 2.0 kV HBM. They work with two typical supply voltages of 3.3V or 5V with very low power consumption, allowing the use of a single devices in both the RF and IF radio sections to save board space.
Peregrine’s PE4370x DSAs provide many additional features, including on-board CMOS logic which facilitates 2.75 V control, and a high-α state at power-up (PUP). The devices are available in the following ultra-compact, RoHS-compliant QFN packages: 32-lead 5x5x0.85 mm (PE43701 and PE43703) and 24-lead 4x4x0.85 mm (PE43702).