ADA-4643 Agilent Technologies, Inc., ADA-4643 Datasheet

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ADA-4643

Manufacturer Part Number

ADA-4643

Description

ADA-4643 Silicon Bipolar Darlington Amplifier

Manufacturer

Agilent Technologies, Inc.

Datasheet

1.ADA-4643.pdf (10 pages)

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Description

Agilent Technologies’ ADA-4643

is an economical, easy-to-use,

general purpose silicon bipolar

RFIC gain block amplifiers

housed in a 4-lead SC-70

(SOT-343) surface mount plastic

package which requires only half

the board space of a SOT-143

package.

The Darlington feedback struc-

ture provides inherent broad

bandwidth performance, result-

ing in useful operating frequency

up to 2.5 GHz. This is an ideal

device for small-signal gain

cascades or IF amplification.

ADA-4643 is fabricated using

Agilent’s HP25 silicon bipolar

process, which employs a double-

diffused single polysilicon

process with self-aligned

submicron emitter geometry. The

process is capable of simulta-

neous high f

breakdown (25 GHz f

BVCEO). The process utilizes

industry standard device oxide

isolation technologies and

submicron aluminum multilayer

interconnect to achieve superior

performance, high uniformity,

and proven reliability.

T

and high NPN

T

at 6V

input

Agilent ADA-4643

Silicon Bipolar Darlington Amplifier

Data Sheet

Surface Mount Package

SOT-343

Pin Connections and

Package Marking

RFout

Typical Biasing Configuration

Note:

Top View. Package marking provides orientation

and identification.

“2T” = Device Code

“x” = Date code character

RF

& Vd

GND

R c =

C

block

V cc - V d

identifies month of manufacture.

I d

2Tx

V

d

= 3.5 V

R

RFC

c

GND

RFin

C

block

C

bypass

output

RF

V

CC

=

5

V

Features

• Small Signal gain amplifier

• Operating frequency DC – 2.5 GHz

• Unconditionally stable

• 50 Ohms input & output

• Flat, Broadband Frequency

• Operating Current: 20 to 60 mA

• Industry standard SOT-343 package

Specifications

900 MHz, 3.5V, 35 mA (typ.)

• 17 dB associated gain

• 13.4 dBm P

• 28.3 dBm OIP

• 4 dB noise figure

• VSWR < 2.2 throughput operating

• Single supply, typical I

Applications

• Cellular/PCS/WLL base stations

• Wireless data/WLAN

• Fiber-optic systems

• ISM

Response up to 1 GHz

frequency

1dB

3

d

= 35 mA

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