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. ©2006, 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 sales-support@rfmd.com.

Ordering Information

BiFET HBT

LDMOS

1

2

3

4

9

10

11 12

20

19

18

17

32 31 30 29

A2

5

6

7

8

13 14 15 16

24

23

22

21

28 27 26 25

5-Bit Step

Attenuator

5-Bit Step

Attenuator

AMP

AMP

A3

A4

VCMA

VCMB

B4

B3

B2

OPA+

OPA-

ENBA

RESA

RESB

ENBB

OPB-

OPB+

RFDA0035

DIGITAL CONTROLLED IF DUAL VGA

5 BIT 1dB LSB CONTROL

RFMD's RFDA0035 is a dual-channel, digitally controlled variable gain amplifier fea-

turing high linearity over the entire 32 gain control steps. It features independent

channel power-up enable, independent channel current adjustability for optimizing

DC versus IP3 and a 200

 differential input and output impedance.

Features



Dual Independent Digitally

Controlled VGAs



Bandwidth of 500MHz (-3dB)



Gain Control Range=31dB (1dB

Step Size)



Differential Input and Output



Max Gain=19.0dB@180MHz



Noise Figure: 7.5dB@Maximum

Gain



High OIP3/P1dB=+42/21dBm

@180MHz





Single +5V Supply



Dual 5-Bit Parallel Control

Interface



Individual Enable Control for

Each VGA



Current Adjustable for IP3 Trade

Offs



Small 32-Pin, 5.0mmx5.0mm,

QFN

Applications



Differential ADC Drivers



Main and Diversity IF Sampling

Receivers



Wideband Multichannel

Receivers



Instrumentation

DS110329



Package: QFN 32-Pin, 5.0mmx5.0mm

RFDA0035Dig-

ital Controlled

IF Dual VGA

RFDA0035SR

7” Sample reel with 100 pieces

RFDA0035SQ

25 piece Sample bag

RFDA0035TR7

7” Reel with 750 pieces

RFDA0035TR13

13” Reel with 2500 pieces

RFDA0035PCK-410 50MHz to 500MHz PCBA with 5-piece sample bag