RF3858

3.0 V TO 4.2V, ISM BAND TRANSMIT/RECEIVE

MODULE WITH DIVERSITY TRANSFER SWITCH

trademarks are the property of their respective owners. ©2009, RF Micro Devices, Inc.

DS130424

7628 Thorndike Road, Greensboro, NC 27409-9421 – For sales or technical

Support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com

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Package: LGA, 32-pin, 8mm x 8mm x 1.2mm

Features



Integrated LNA, PA and Transfer Switch



Small From Factor 8.0mm x 8.0mm x

1.2mm



50Ω Inputs and Outputs



Low Insertion Loss, High Isolation

Transfer Switch



31.5dBm PA Output Power



Low PA Harmonic Content

Applications



868MHz/900MHz ISM Band Application



Single Chip RF Front End Module



Portable Battery Powered Equipment



Wireless Automatic Metering Applications

Functional Block Diagram

Product Description

The RF3858 is a single-chip front-end module (FEM) for applications in the

868MHz/900MHz Band. The RF3858 addresses the need for aggressive size reduction for

typical portable equipment RF front-end design and greatly reduces the number of

components outside of the core chipset thus minimizing the footprint and assembly cost of

the overall solution. The RF 3858 contains an integrated 1 Watt PA, TX/RX transfer switch,

LNA with bypass mode, and matching components. The RF3858 is packaged in a 32-pin,

8.0mm x 8.0mm x 1.2mm over molded laminated package with backside ground which

greatly minimizes next level board space and allow for simplified integration .

Optimum Technology Matching® Applied

GaAs HBT

SiGe BiCMOS

GaAs pHEMT

GaN HEM

GaAs MESFET

Si BiCMOS

Si CMOS

RF MEMS

InGaP HBT

SiGe HBT

Si BJT

LDMOS