Data Sheet

–Rev E, Jan 4, 2019| Subject to change without notice

- 1 of 16 -

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QFN, 16pin, 3.0

 mm x 3.0 mm

Key Features

• Broadband 5 – 3000 MHz frequency range

• 30 dB attenuation range

• +50 dBm Input IP3 (typical)

• +80 dBm Input IP2 (typical)

• Low Distortion: -80 dBc CSO and -75 dBc CTB for 132

channel 38 dBmV input

• High 1 dB compression point (> +30 dBm)

• Low supply current: 2 mA (typical)

• 3 V to 5 V power supply

• Linear in dB control characteristic

Product Overview

The RFSA3043 is a fully monolithic analog voltage-

controlled

attenuator

(VCA)

featuring

exceptional

linearity over a typical temperature compensated 30 dB

gain control range. It incorporates a revolutionary new

circuit architecture to solve a long-standing industry

problem: high IP3, high attenuation range, low DC

current,

broad

bandwidth

and

temperature

compensated linear in dB control voltage characteristic.

This voltage-controlled attenuator is controlled by a

single

positive

control

voltage

with

on-chip

DC

conditioning circuitry. The slope of the control voltage

versus gain is selectable. The RFSA3043 draws a very

low 2 mA current and is packaged in a small 3 mm x

3 mm QFN. This attenuator is matched to 75 Ω over its

rated control range and frequency with no external

matching components required.

Ordering Information

Part Number

Description

RFSA3043SQ

Sample Bag with 25 Pieces

RFSA3043SR

7" Reel with 100 Pieces

RFSA3043TR7

7" Reel with 2500 Pieces

RFSA3043PCK-410

EVB with 5 Piece Sample Bag

RFSA3043

75Ω Voltage Controlled Attenuator (5 – 3000 MHz)

Functional Block Diagram

Top View

Applications

• Cable Modems

• CATV

• High Linearity Power Control

®