1 of 11

Optimum Technology Matching® Applied

GaAs HBT

InGaP HBT

GaAs MESFET

SiGe BiCMOS

Si BiCMOS

SiGe HBT

GaAs pHEMT

Si CMOS

Si BJT

GaN HEMT

Functional Block Diagram

RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-

mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2011, RF Micro Devices, Inc.

Product Description

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

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

BiFET HBT

LDMOS



9

10

1

2

3

4

5

6

7

8

11

12

13

14

15

16

24

23

22

21

20

19

18

17

32

31

30

29

28

27

26

25

AMPIN

GND

GND

ATTOUT

ACG1

ACG2

ACG3

ACG4

NC

NC

NC

NC

NC

NC

NC

Vdd

DSA

6-bit SPI

E-pad

GND

RFDA0025

DIGITAL CONTROLLED VARIABLE GAIN

AMPLIFIER

RFMD’s RFDA0025 is a digital controlled variable gain amplifier featuring high lin-

earity over the entire gain control range. The 6-bit digital step attenuator is pro-

grammed with a serial mode control interface. The RFDA0025 is packaged in a

small 5.2mmx5.2mm leadless laminate MCM with plated through thermal vias for

ultra low thermal resistance. The footprint for this module is directly compatible

with most 32-pin 5mmx5mm QFNs. The amplifier’s bias choke and DC blocks are

external, allowing for optimum performance over specific bands within 50MHz to

850MHz.

Features



50MHz to 850MHz Operation



6-Bit Digital Step Attenuator



Serial Control Interface



31.5dB Attenuation Range

(0.5dB Step)



High OIP3/P1dB=+42/20dBm



Single +5V Supply



Footprint Compatible with 32-Pin

5mmx5mm QFN

Applications



Transceiver IF DVGA



Cellular, PCS, 3G Infrastructure



Wireless Data, Satellite

Terminals

DS120817





Package: MCM 32-Pin, 5.2mmx5.2mm

RFDA0025Dig-

ital Controlled

Variable Gain

Amplifier

RFDA0025SQ

Sample bag with 25 pieces

RFDA0025SR

7” Reel with 100 pieces

RFDA0025R7

7” Reel with 750 pieces

RFDA0025R13

13” Reel with 2500 pieces

RFDA0025PCK-410 50MHz to 850MHz PCBA with 5-piece sample bag

Ordering Information