NXP Semiconductors BFU520 User manual

UM10772

User Manual BFU5xx series starter kits

Rev. 1 — 21 January 2014

User manual

Document information

Info

Content

Keywords

BFU520, BFU530, BFU550, BFU520A, BFU530A, BFU550A, BFU520W

BFU530W, BFU550W, BFU520X, BFU530X, BFU550X, BFU520XR,

BFU530XR, BFU550XR, amplifier, LNA, Wide Band Amplifier, PCB

layout, Assembly drawings

Abstract

Document that describes the PCB’s and SW content as delivered in the

BFU5xx series transistor starter kit

NXP Semiconductors

UM10772

How to use BFU5xx starter-kit

UM10772

User manual

Rev. 1 — 21 January 2014

2 of 29

Contact information

For additional information, please visit:

http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Revision history

Rev

Date

Description

2014-01-21

First publication

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How to use BFU5xx starter-kit

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User manual

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1. Introduction

The BFU5xxX transistor family is designed to meet the latest requirements on high frequency

applications (up to approximately 1.5 GHz) such as communication, automotive and industrial

equipment.

As soon as fast, low noise analogue signal processing is required, combined with medium to high

voltage swings, the BFU5xxX transistors are the perfect choice. Due to the high gain at low supply

current those types can also be applied very well in battery fed equipment.

Compared to previous Philips / NXP transistor generations and competitor products, improvements

on gain, noise and thermal properties are realized. BFU5xxX transistors will be available in various

packages.

The transistors will be promoted with a full promotion package, called “starter kits” (one kit type per

package-type). Those kits include two PCB’s (one with grounded emitter, one with emitter

degeneration provision), RF connectors, transistors and simulation model parameters required to

perform simulations. See the overview of available starter kits in the table below.

Table 1. Customer evaluation kits

Transistor Types

Evaluation Kit

BFU520, BFU530, BFU550

OM7962, starter kit SOT143

BFU520X, BFU530X, BFU550X

OM7963, starter kit SOT143X

BFU520XR, BFU530XR, BFU550XR

OM7964, starter kit SOT143XR

BFU520A, BFU530A, BFU550A

OM7961, starter kit SOT23

BFU520W, BFU530W, BFU550W

OM7960, starter kit SOT323

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Table 2. Application Notes

Transistor Type

Application Notes (433MHz LNA; 866MHz LNA)

BFU520

AN11427; AN11428

BFU530

AN11429; AN11430

BFU550

AN11431; AN11432

BFU520A

AN11377; AN11378

BFU530A

AN11379; AN11380

BFU550A

AN11381; AN11382

BFU520W

AN11421; AN11422

BFU530W

AN11423; AN11424

BFU550W

AN11425; AN11426

BFU520X

AN11433; AN11434

BFU530X

AN11435; AN11436

BFU550X

AN11437; AN11438

BFU520XR

AN11439; AN11440

BFU530XR

AN11441; AN11442

BFU550XR

AN11443; AN11444

2. Content of the starter kits

The starter kits contains following items:

1) 10 transistors of BFU520W

2) 10 transistors of BFU530W

3) 10 transistors of BFU550W

4) One generic Printed Circuit Board for amplifier design with grounded emitter

5) One generic Printed Circuit Board for amplifier design using feedback via emitter

6) 4 SMA connectors

7) 2 DC connectors

8) A USB memory stick containing Application notes, models, datasheets, S parameter data

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2.1 The starter kit

Fig 1. BFU5xx series starter kit

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2.2 PCB’s example for BFU5xx series LNA

Fig 2. PCB’s BFU5-- series populated board, example 433MHz LNA in SOT143 package

3. Target applications for starter kit PCB’s

Basically the PCB’s are designed to accommodate an RF amplifier. These could be:

1) LNA’s

2) Generic RF Amplifiers, small signal, small band

3) Wide band amplifiers (by applying feedback)

4) Amplifiers for large signal (using for example BFU550 types).

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3.1 Basic schematic for Grounded Emitter versions (VGE0x)

Fig 3. Schematic Amplifier design VGE

Remarks:

- Not all components are required, depends on amplifier/matching configuration

- Input and output considered to be 50 Ohms characteristic impedance (SMA type)

- Generic PI or T matching network at input and output possible

- Basically on all BFU5xx series amplifier EVB’s this schematic is applied, small variations on

implementation are possible

Zin2 TR1

Zin1

Zin5

Zin3

Zin6

RF input

Zc1 Zc2

Zc3

Zbias2Zbias1

Zfb2

Zfb1

Zout1

Zout4

Zout2

Zout5

Zout3

Celectrolytic +

RF output

Zin4

Zbias3

Zfb3

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3.2 Basic schematic for Emitter Degeneration version (VED0x)

Fig 4. Schematic Amplifier design VED

Remarks:

- Not all components are required, depends on amplifier/matching configuration

- Input and output considered to be 50 Ohms characteristic impedance (SMA type)

- Two parallel components from emitter to GND enable to split DC/AC

- Generic PI or T matching network at input and output possible

Basically on all BFU5xx series amplifier EVB’s this schematic is applied, small variations on

implementation are possible

Zin2 TR1

Zin1

Zin5

Zin3

Zin6

RF input

Zc1 Zc2

Zc3

Zbias2Zbias1

Zfb2

Zfb1

Zout1

Zout4

Zout2

Zout5

Zout3

Celectrolytic +

RF output

Zin4

Zbias3

Zfb3

Ze1

Ze2

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4. PCB drawings for all versions

On all PCB’s, except SOT143XR types the same circuit can be applied. On all PCB’s

except the SOT323, 0603 footprints for capacitors/inductors/resistors are implemented.

For SOT323 types this is reduced to 0402 because of the smaller size transistor

package.

4.1 Layer stack

Fig 5. Applied PCB layout stack

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4.2 SOT323 Grounded Emitter

Fig 6. PCB Assembly drawing Amplifier design VGE

Fig 7. PCB Assembly drawing Amplifier design VGE zoomed in

Zin1 Zin2 Zin3

Zin4

Zin5

Zfb1

Zfb2

Zout1 Zout2 Zout3

Zout4

Zout5

Zb1

Zb2

Zc1 Zc2

C2 C3

Celectrolytic

RF input SMA RF output SMA

+Vcc GND

TR1

Zc3

GND

Zin6

Zfb3

Zb3

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