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The SP43503 is a HaRP

™-enhanced, high linearity, 5-bit RF

Digital Step Attenuator (DSA) covering a 31 dB attenuation

range in 1 dB steps. The Peregrine 50

Ω RF DSA provides a

serial CMOS control interface. It maintains high attenuation

accuracy over frequency and temperature and exhibits very low

insertion loss and low power consumption. Performance does

not change with Vdd due to on-board regulator. This next

generation Peregrine DSA is available in a 4x4 mm 24-lead

QFN footprint.

The SP43503 is manufactured on SIPAT’s CMOS

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

5-bit, 31 dB, 9 kHz - 6.0 GHz

Product Description

Figure 2. Functional Schematic Diagram

SP43503

Features

Figure 1. Package Type

Control Logic Interface

RF Input

RF Output

Switched Attenuator Array

Serial In

LE

CLK

A0

A1

A2

P/S

24-lead 4x4x0.85 mm QFN Package

Tel: +86-23-62808818

Fax: +86-23-62805284

www.sipatsaw.com / sawmkt@sipat.com