The PE43705 is a 50Ω, HaRP™ technology-enhanced, 7-bit RF digital step attenuator (DSA) designed for use in 3G/4G wireless infrastructure and other high performance RF applications. This DSA is a pin-compatible upgraded version of PE43703 with higher power handling and a wider frequency, control voltage and operating temperature range. An integrated digital control interface supports both serial and parallel programming of the attenuation, including the capability to program an initial attenuation state at power-up. Covering a 31.75 dB attenuation range in 0.25 dB, 0.50 dB, or 1 dB steps, it maintains a monotonic step response from 50 MHz through 8 GHz. PE43705 also features safe attenuation state transitions and is offered in a 32-lead 5 × 5 mm QFN package. In addition, no external blocking capacitors are required if 0V DC is present on the RF ports.
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