Peregrine Semiconductor Corporation released three new 7-bit UltraCMOS digital step attenuators (DSAs) to complement its 50-Ohm DSA line: the PE43701, PE43702 and PE43703. The new DSAs are enhanced with the company's HaRP technology and feature serial and parallel interface logic. A serial-addressable control interface allows the user to control up to 8 different DSAs using a common 3-wire interface bus. The new DSAs offer 31.75dB attenuation range in 0.25 dB, 0.5 dB, or 1.0 dB steps.
Peregrine reports that the PE43701, PE43702 and PE43703 offer best-in-class linearity with and Input third-order intercept point (IP3) of +57 dBm, attenuation accuracy of +/- 0.20 + 2% of attenuation setting at 3GHz, and typical insertion loss of 1.6dB. There is no gate lag to settling time nor phase shift, making them well suited for next-generation communication systems such as cellular base stations, repeaters, femtocells and power amplifier distortion cancelling loops. In particular, the PE43703 DSA is particlalry well suited for test and measurement applications and complements Peregrine's recently introduced PE42552 RF Switch.
The 50-Ohm DSAs have an operating frequency range of near DC up to 6 GHz, with ESD tolerance of 2.0 kV HBM. They work with two typical supply voltages of 3.3V or 5V, allowing the use of a single devices in both the RF and IF radio sections to save board space.
Peregrine's PE4370x DSAs also include 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). All products are sampling now and are priced at PE43701: $3.65 (100K units); PE43702: $3.36 (100K units); and PE43703: $8.20 (100K units).