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Document No. 70-0245-05

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©2008-2009 Peregrine Semiconductor Corp. All rights reserved.

The PE43703 is a HaRP

™-enhanced, high linearity, 7-bit RF

Digital Step Attenuator (DSA). This highly versatile DSA

covers a 31.75 dB attenuation range in 0.25 dB, 0.5 dB, or 1.0

dB steps. The customer can choose which step size and

associated specifications are best suited for their application.

The Peregrine 50

Ω RF DSA provides multiple CMOS control

interfaces and an optional external Vss feature. It maintains

high attenuation accuracy over frequency and temperature and

exhibits very low insertion loss and low power consumption.

regulator. This next generation Peregrine DSA is available in a

5x5 mm 32-lead QFN footprint.

The PE43703 is manufactured on Peregrine’s UltraCMOS™

process, a patented variation of silicon-on-insulator (SOI)

technology on a sapphire substrate, offering the performance

of GaAs with the economy and integration of conventional

CMOS.

Product Specification

50

Ω RF Digital Attenuator

7-bit, 31.75 dB, 9 kHz - 6000 MHz

Product Description

Figure 2. Functional Schematic Diagram

PE43703

Features

1.0 dB steps to 31.75 dB

≤ 4.0 GHz

≤ 5.0 GHz

≤ 6.0 GHz

eight addresses 000 - 111

Figure 1. Package Type

32-lead 5x5x0.85 mm QFN Package

Control Logic Interface

RF Input

RF Output

Switched Attenuator Array

Serial In

LE

CLK

A0

A1

A2

P/S

Vss

EXT

(optional)