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The SP43701 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 steps. The

SIPAT 50

Ω RF DSA provides a parallel or serial-

addressable 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 SIPAT DSA is available in a

5x5 mm 32-lead QFN footprint.

The SP43701 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

7-bit, 31.75 dB, DC-4.0 GHz

Product Description

Figure 2. Functional Schematic Diagram

SP43701

Features

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

Tel: +86-23-62808818

Fax: +86-23-62805284

www.sipatsaw.com / sawmkt@sipat.com