ADA-4643 Datasheet, PDF(1/12 Page) Agilent(Hewlett-Packard)

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ADA-4643 Datasheet, PDF (1/12 Pages) Agilent(Hewlett-Packard) – Silicon Bipolar Darlington Amplifier

ADA-4643

Silicon Bipolar Darlington Amplifier

Data Sheet

Description

Avago Technologiesâ ADA-4643 is an economical, easy-to-

use, general purpose silicon bipolar RFIC gain block am-

plifiers 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 structure provides inherent

broad bandwidth performance, resulting in useful ope-

rating frequency up to 2.5 GHz. This is an ideal device for

small-signal gain cascades or IF amplification.

ADA-4643 is fabricated using Avagoâs HP25 silicon bipolar

process, which employs a double-diffused single poly-

silicon process with self-aligned submicron emitter

geometry. The process is capable of simultaneous high fT

and high NPN breakdown (25 GHz fT at 6 V BVCEO). The

process utilizes industry standard device oxide isolation

technologies and submicron aluminum multilayer inter-

connect to achieve superior performance, high uniformity,

and proven reliability.

Surface Mount Package

SOT-343

Pin Connections and Package Marking

Features

ï·ï ï Small Signal gain amplifier

ï·ï ï Operating frequency DC â 2.5 GHz

ï·ï ï Unconditionally stable

ï·ï ï 50 Ohms input & output

ï·ï ï Flat, Broadband Frequency Response up to 1 GHz

ï·ï ï Operating Current: 20 to 60 mA

ï·ï ï Industry standard SOT-343 package

ï·ï ï Lead-free option available

Specifications

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

ï·ï ï 17 dB associated gain

ï·ï ï 13.4 dBm P1dB

ï·ï ï 28.3 dBm OIP3

ï·ï ï 4 dB noise figure

ï·ï ï VSWR < 2.2 throughput operating frequency

ï·ï ï Single supply, typical Id = 35 mA

Applications

ï·ï ï Cellular/PCS/WLL base stations

ï·ï ï Wireless data/WLAN

ï·ï ï Fiber-optic systems

ï·ï ï ISM

Typical Biasing Configuration

Vcc â

VCC = 5 V

Cbypass

RFout

& Vd

GND

RFin

input

2Tx

Cblock

RFC

Cblock

Vd = 3.5 V

output

Note:

Top View. Package marking provides orientation and identification.

â2Tâ = Device Code

âxâ = Date code character identifies month of manufacture.

Attention: Observe precautions for

handling electrostatic sensitive devices.

ESD Machine Model (Class A)

ESD Human Body Mode (Class 1B)

Refer to Avago Application Note A004R:

Electrostatic Discharge, Damage and Control.

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