AN11293
BGA3012 - 5 MHz to 300 MHz 12 dB reverse amplifier
application
Rev. 1 — 14 February 2013
Application note
Document information
Info
Keywords
Abstract
Content
BGA3012, Evaluation board, CATV, Drop amplifier
This application note describes the schematic and layout requirements
for using the BGA3012 as a CATV reverse amplifier.
NXP Semiconductors
AN11293
BGA3012 - 5 MHz to 300 MHz 12 dB reverse amplifier application
Revision history
Rev
Date
1
20130214
Description
First publication
Contact information
For more information, please visit:
http://www.nxp.com
For sales office addresses, please send an email to:
salesaddresses@nxp.com
AN11293
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Application note
Rev. 1 — 14 February 2013
2 of 19
NXP Semiconductors
AN11293
BGA3012 - 5 MHz to 300 MHz 12 dB reverse amplifier application
1. Introduction
The BGA3012 customer evaluation board enables the user to evaluate the performance
of the wideband CATV MMIC amplifier BGA3012.
The BGA3012 performance information is available in the BGA3012 datasheet.
This application note describes the evaluation board schematic and layout requirements
for using the BGA3012 as a CATV reverse amplifier between 5 MHz and 300 MHz. The
BGA3012 is fabricated in the BiCMOS process and packaged in a lead-free 3-pin SOT89
package. The BGA3012 is surface-mounted on an evaluation board with element
matching and DC decoupling circuitry. The amplifier MMIC comprises a two stage
amplifier with internal bias network and operates over a frequency range of 5 MHz to
1006 MHz with a supply voltage between 5 V and 8 V.
2. System features
•
•
•
•
•
•
•
•
12 dB gain
Internally biased
Flat gain between 5 MHz and 300 MHz
Noise figure of 3.3 dB
High linearity with an IP3
O
of 40 dBm and IP2
O
of 60 dBm
75 Ω input and output impedance
Unconditionally stable
Excellent input and output return loss
3. Customer evaluation kit contents
The evaluation kit contains the following items:
•
ESD safe casing
•
BGA3012 evaluation board
•
BGA3012 SOT89 samples
AN11293
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Application note
Rev. 1 — 14 February 2013
3 of 19
NXP Semiconductors
AN11293
BGA3012 - 5 MHz to 300 MHz 12 dB reverse amplifier application
4. Application Information
For evaluation purposes an evaluation board is available. The evaluation circuit can be
seen in figure 1 and the corresponding PCB is shown in figure 2. Table 1 shows the bill
of materials.
4.1 Evaluation board circuit
Fig 1.
BGA3012 evaluation circuit
The power supply is applied on the center pin of connector J3 and is applied to the MMIC
via choke L2 which provides RF blocking to the supply line. Capacitors C4 and C5 are
supply decoupling capacitors.
At the F-connector J1 the RF input signal is applied where capacitor C1 provides DC-
blocking. Resistors R1 and R2 are used as feedback resistors to set the gain and slope.
Two resistors are used to lower the influence of the parasitic capacitance from the circuit
board. Capacitor C2 provides DC-blocking between the input and output of the MMIC.
Capacitor C3 provides DC-blocking before the RF signal is available at F-connector J2.
AN11293
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Application note
Rev. 1 — 14 February 2013
4 of 19
NXP Semiconductors
AN11293
BGA3012 - 5 MHz to 300 MHz 12 dB reverse amplifier application
4.2 Evaluation board layout
PCB material
PCB thickness
PCB size
ε
r
Copper thickness
Fig 2.
= FR4
= 1.5 mm
= 40 mm x 40 mm
= 4.6
= 35 µm
BGA3012 evaluation board layout
For optimum distortion performance it is important to have enough ground vias
underneath and around the MMICs ground pins. This lowers the inductance to the
ground plane. The evaluation board is made with two layer FR4 material.
AN11293
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Application note
Rev. 1 — 14 February 2013
5 of 19
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
