RFSA3043 Datasheet, PDF (1/18 Pages) RF Micro Devices – 75Ω Voltage Controlled Attenuator 5MHz to 3000MHz

RFSA3043
75Ω Voltage Controlled Attenuator
5MHz to 3000MHz
RFMD’s RFSA3043 is a fully monolithic analog voltage controlled
attenuator (VCA) featuring exceptional linearity over a typical temperature
compensated 30dB 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 2mA current and is
packaged in a small 3mm x 3mm QFN. This attenuator is matched to 75Ω
over its rated control range and frequency with no external matching
components required. Typical VCAs in this performance category have poor
inherent attenuation versus temperature and poor nonlinear attenuation
versus control voltage characteristics. To correct these short-comings, other
VCAs require extensive off chip analog support circuitry that consumes
valuable PCB area and additional DC power. This game changing product
incorporates the complete solution in a small 3mm x 3mm QFN package
that reduces the footprint 20x in area and reduces the DC power by 5x over
conventional PIN diode approaches.
RFSA3043
Package: QFN, 16-pin,
3.0mm x 3.0mm
Features
■ Patent Pending Circuit Architecture
■ Broadband 5MHz to 3000MHz
Frequency Range
■ 30dB Attenuation Range
■ +50dBm Input IP3 Typical
■ +80dBm Input IP2 Typical
■ Low Distortion -80dBc CSO and
-75dBc CTB for 132 Channel
38dBmV Input
■ High 1dB Compression Point
>+30dBm
■ Low Supply Current 2mA Typical
■ 3V to 5V Power Supply
■ Linear in dB Control Characteristic
■ Internal Temperature
Compensation
■ Class 2 ESD (2000V)
■ Complete Solution in a Small 3mm
x 3mm, QFN Package
Functional Block Diagram
Ordering Information
RFSA3043SQ
Sample bag with 25 pieces
RFSA3043SR
7" Reel with 100 pieces
RFSA3043TR7
7" Reel with 2500 pieces
RFSA3043PCK-410 5MHz to 3000MHz PCBA with 5-piece sample
bag
Applications
■ Cable Modems
■ CATV
■ High Linearity Power Control
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421
For sales or technical support, contact RFMD at +1.336.678.5570 or [e-mail].
DS160619
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trademarks, and registered trademarks are the property of their respective owners. ©2013, RF Micro Devices, Inc.
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